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CVE-2023-44487 - fix HTTP/2 Rapid Reset

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Resolves: RHEL-12524
This commit is contained in:
Jan Macku 2023-10-13 12:27:46 +02:00
parent 40051991f0
commit b8b72ac2f0
2 changed files with 984 additions and 1 deletions
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976
0003-nghttp2-1.33.0-CVE-2023-44487.patch Normal file
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@ -0,0 +1,976 @@
From 095040ff7ac242cec5075b8d4bd8c9884bc3ec30 Mon Sep 17 00:00:00 2001
From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Sun, 1 Oct 2023 00:05:01 +0900
Subject: [PATCH] Rework session management
(cherry picked from commit 72b4af6143681f528f1d237b21a9a7aee1738832)
Signed-off-by: Jan Macku <jamacku@redhat.com>
---
CMakeLists.txt | 4 ++
cmakeconfig.h.in | 9 +++
configure.ac | 21 +++++++
doc/Makefile.am | 1 +
lib/CMakeLists.txt | 2 +
lib/Makefile.am | 4 ++
lib/includes/nghttp2/nghttp2.h | 17 ++++++
lib/nghttp2_option.c | 7 +++
lib/nghttp2_option.h | 6 ++
lib/nghttp2_ratelim.c | 75 ++++++++++++++++++++++++
lib/nghttp2_ratelim.h | 57 ++++++++++++++++++
lib/nghttp2_session.c | 34 ++++++++++-
lib/nghttp2_session.h | 12 +++-
lib/nghttp2_time.c | 62 ++++++++++++++++++++
lib/nghttp2_time.h | 38 ++++++++++++
tests/CMakeLists.txt | 1 +
tests/Makefile.am | 6 +-
tests/main.c | 7 ++-
tests/nghttp2_ratelim_test.c | 101 ++++++++++++++++++++++++++++++++
tests/nghttp2_ratelim_test.h | 35 +++++++++++
tests/nghttp2_session_test.c | 103 +++++++++++++++++++++++++++++++++
tests/nghttp2_session_test.h | 1 +
22 files changed, 598 insertions(+), 5 deletions(-)
create mode 100644 lib/nghttp2_ratelim.c
create mode 100644 lib/nghttp2_ratelim.h
create mode 100644 lib/nghttp2_time.c
create mode 100644 lib/nghttp2_time.h
create mode 100644 tests/nghttp2_ratelim_test.c
create mode 100644 tests/nghttp2_ratelim_test.h
diff --git a/CMakeLists.txt b/CMakeLists.txt
index dbac6c8..78b356d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -262,6 +262,7 @@ check_include_file("netinet/in.h" HAVE_NETINET_IN_H)
check_include_file("pwd.h" HAVE_PWD_H)
check_include_file("sys/socket.h" HAVE_SYS_SOCKET_H)
check_include_file("sys/time.h" HAVE_SYS_TIME_H)
+check_include_file("sysinfoapi.h" HAVE_SYSINFOAPI_H)
check_include_file("syslog.h" HAVE_SYSLOG_H)
check_include_file("time.h" HAVE_TIME_H)
check_include_file("unistd.h" HAVE_UNISTD_H)
@@ -302,8 +303,11 @@ check_type_size("time_t" SIZEOF_TIME_T)
include(CheckFunctionExists)
check_function_exists(_Exit HAVE__EXIT)
check_function_exists(accept4 HAVE_ACCEPT4)
+check_function_exists(clock_gettime HAVE_CLOCK_GETTIME)
check_function_exists(mkostemp HAVE_MKOSTEMP)
+check_symbol_exists(GetTickCount64 sysinfoapi.h HAVE_GETTICKCOUNT64)
+
include(CheckSymbolExists)
# XXX does this correctly detect initgroups (un)availability on cygwin?
check_symbol_exists(initgroups grp.h HAVE_DECL_INITGROUPS)
diff --git a/cmakeconfig.h.in b/cmakeconfig.h.in
index d67b540..4065029 100644
--- a/cmakeconfig.h.in
+++ b/cmakeconfig.h.in
@@ -34,9 +34,15 @@
/* Define to 1 if you have the `accept4` function. */
#cmakedefine HAVE_ACCEPT4 1
+/* Define to 1 if you have the `clock_gettime` function. */
+#cmakedefine HAVE_CLOCK_GETTIME 1
+
/* Define to 1 if you have the `mkostemp` function. */
#cmakedefine HAVE_MKOSTEMP 1
+/* Define to 1 if you have the `GetTickCount64` function. */
+#cmakedefine HAVE_GETTICKCOUNT64 1
+
/* Define to 1 if you have the `initgroups` function. */
#cmakedefine01 HAVE_DECL_INITGROUPS
@@ -73,6 +79,9 @@
/* Define to 1 if you have the <sys/time.h> header file. */
#cmakedefine HAVE_SYS_TIME_H 1
+/* Define to 1 if you have the <sysinfoapi.h> header file. */
+#cmakedefine HAVE_SYSINFOAPI_H 1
+
/* Define to 1 if you have the <syslog.h> header file. */
#cmakedefine HAVE_SYSLOG_H 1
diff --git a/configure.ac b/configure.ac
index a54398e..a41492c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -607,6 +607,7 @@ AC_CHECK_HEADERS([ \
string.h \
sys/socket.h \
sys/time.h \
+ sysinfoapi.h \
syslog.h \
time.h \
unistd.h \
@@ -681,6 +682,7 @@ AC_FUNC_STRNLEN
AC_CHECK_FUNCS([ \
_Exit \
accept4 \
+ clock_gettime \
dup2 \
getcwd \
getpwnam \
@@ -706,6 +708,25 @@ AC_CHECK_FUNCS([ \
AC_CHECK_FUNC([timerfd_create],
[have_timerfd_create=yes], [have_timerfd_create=no])
+AC_MSG_CHECKING([checking for GetTickCount64])
+AC_LINK_IFELSE([AC_LANG_PROGRAM(
+[[
+#include <sysinfoapi.h>
+]],
+[[
+GetTickCount64();
+]])],
+[have_gettickcount64=yes],
+[have_gettickcount64=no])
+
+if test "x${have_gettickcount64}" = "xyes"; then
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([HAVE_GETTICKCOUNT64], [1],
+ [Define to 1 if you have `GetTickCount64` function.])
+else
+ AC_MSG_RESULT([no])
+fi
+
# For cygwin: we can link initgroups, so AC_CHECK_FUNCS succeeds, but
# cygwin disables initgroups due to feature test macro magic with our
# configuration. FreeBSD declares initgroups() in unistd.h.
diff --git a/doc/Makefile.am b/doc/Makefile.am
index 5a58f8e..87f6c43 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -69,6 +69,7 @@ APIDOCS= \
nghttp2_option_set_user_recv_extension_type.rst \
nghttp2_option_set_max_outbound_ack.rst \
nghttp2_option_set_max_settings.rst \
+ nghttp2_option_set_stream_reset_rate_limit.rst \
nghttp2_pack_settings_payload.rst \
nghttp2_priority_spec_check_default.rst \
nghttp2_priority_spec_default_init.rst \
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 17e422b..d44de28 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -23,6 +23,8 @@ set(NGHTTP2_SOURCES
nghttp2_mem.c
nghttp2_http.c
nghttp2_rcbuf.c
+ nghttp2_ratelim.c
+ nghttp2_time.c
nghttp2_debug.c
)
diff --git a/lib/Makefile.am b/lib/Makefile.am
index 24a5bd6..595714d 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -49,6 +49,8 @@ OBJECTS = nghttp2_pq.c nghttp2_map.c nghttp2_queue.c \
nghttp2_mem.c \
nghttp2_http.c \
nghttp2_rcbuf.c \
+ nghttp2_ratelim.c \
+ nghttp2_time.c \
nghttp2_debug.c
HFILES = nghttp2_pq.h nghttp2_int.h nghttp2_map.h nghttp2_queue.h \
@@ -65,6 +67,8 @@ HFILES = nghttp2_pq.h nghttp2_int.h nghttp2_map.h nghttp2_queue.h \
nghttp2_mem.h \
nghttp2_http.h \
nghttp2_rcbuf.h \
+ nghttp2_ratelim.h \
+ nghttp2_time.h \
nghttp2_debug.h
libnghttp2_la_SOURCES = $(HFILES) $(OBJECTS)
diff --git a/lib/includes/nghttp2/nghttp2.h b/lib/includes/nghttp2/nghttp2.h
index b0ff6c5..9eb764c 100644
--- a/lib/includes/nghttp2/nghttp2.h
+++ b/lib/includes/nghttp2/nghttp2.h
@@ -2671,6 +2671,23 @@ NGHTTP2_EXTERN void nghttp2_option_set_max_outbound_ack(nghttp2_option *option,
NGHTTP2_EXTERN void nghttp2_option_set_max_settings(nghttp2_option *option,
size_t val);
+/**
+ * @function
+ *
+ * This function sets the rate limit for the incoming stream reset
+ * (RST_STREAM frame). It is server use only. It is a token-bucket
+ * based rate limiter. |burst| specifies the number of tokens that is
+ * initially available. The maximum number of tokens is capped to
+ * this value. |rate| specifies the number of tokens that are
+ * regenerated per second. An incoming RST_STREAM consumes one token.
+ * If there is no token available, GOAWAY is sent to tear down the
+ * connection. |burst| and |rate| default to 1000 and 33
+ * respectively.
+ */
+NGHTTP2_EXTERN void
+nghttp2_option_set_stream_reset_rate_limit(nghttp2_option *option,
+ uint64_t burst, uint64_t rate);
+
/**
* @function
*
diff --git a/lib/nghttp2_option.c b/lib/nghttp2_option.c
index 34348e6..0d9a404 100644
--- a/lib/nghttp2_option.c
+++ b/lib/nghttp2_option.c
@@ -126,3 +126,10 @@ void nghttp2_option_set_max_settings(nghttp2_option *option, size_t val) {
option->opt_set_mask |= NGHTTP2_OPT_MAX_SETTINGS;
option->max_settings = val;
}
+
+void nghttp2_option_set_stream_reset_rate_limit(nghttp2_option *option,
+ uint64_t burst, uint64_t rate) {
+ option->opt_set_mask |= NGHTTP2_OPT_STREAM_RESET_RATE_LIMIT;
+ option->stream_reset_burst = burst;
+ option->stream_reset_rate = rate;
+}
diff --git a/lib/nghttp2_option.h b/lib/nghttp2_option.h
index 939729f..e6ba910 100644
--- a/lib/nghttp2_option.h
+++ b/lib/nghttp2_option.h
@@ -68,12 +68,18 @@ typedef enum {
NGHTTP2_OPT_NO_CLOSED_STREAMS = 1 << 10,
NGHTTP2_OPT_MAX_OUTBOUND_ACK = 1 << 11,
NGHTTP2_OPT_MAX_SETTINGS = 1 << 12,
+ NGHTTP2_OPT_STREAM_RESET_RATE_LIMIT = 1 << 15,
} nghttp2_option_flag;
/**
* Struct to store option values for nghttp2_session.
*/
struct nghttp2_option {
+ /**
+ * NGHTTP2_OPT_STREAM_RESET_RATE_LIMIT
+ */
+ uint64_t stream_reset_burst;
+ uint64_t stream_reset_rate;
/**
* NGHTTP2_OPT_MAX_SEND_HEADER_BLOCK_LENGTH
*/
diff --git a/lib/nghttp2_ratelim.c b/lib/nghttp2_ratelim.c
new file mode 100644
index 0000000..7011655
--- /dev/null
+++ b/lib/nghttp2_ratelim.c
@@ -0,0 +1,75 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2023 nghttp2 contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_ratelim.h"
+#include "nghttp2_helper.h"
+
+void nghttp2_ratelim_init(nghttp2_ratelim *rl, uint64_t burst, uint64_t rate) {
+ rl->val = rl->burst = burst;
+ rl->rate = rate;
+ rl->tstamp = 0;
+}
+
+void nghttp2_ratelim_update(nghttp2_ratelim *rl, uint64_t tstamp) {
+ uint64_t d, gain;
+
+ if (tstamp == rl->tstamp) {
+ return;
+ }
+
+ if (tstamp > rl->tstamp) {
+ d = tstamp - rl->tstamp;
+ } else {
+ d = 1;
+ }
+
+ rl->tstamp = tstamp;
+
+ if (UINT64_MAX / d < rl->rate) {
+ rl->val = rl->burst;
+
+ return;
+ }
+
+ gain = rl->rate * d;
+
+ if (UINT64_MAX - gain < rl->val) {
+ rl->val = rl->burst;
+
+ return;
+ }
+
+ rl->val += gain;
+ rl->val = nghttp2_min(rl->val, rl->burst);
+}
+
+int nghttp2_ratelim_drain(nghttp2_ratelim *rl, uint64_t n) {
+ if (rl->val < n) {
+ return -1;
+ }
+
+ rl->val -= n;
+
+ return 0;
+}
diff --git a/lib/nghttp2_ratelim.h b/lib/nghttp2_ratelim.h
new file mode 100644
index 0000000..866ed3f
--- /dev/null
+++ b/lib/nghttp2_ratelim.h
@@ -0,0 +1,57 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2023 nghttp2 contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_RATELIM_H
+#define NGHTTP2_RATELIM_H
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+typedef struct nghttp2_ratelim {
+ /* burst is the maximum value of val. */
+ uint64_t burst;
+ /* rate is the amount of value that is regenerated per 1 tstamp. */
+ uint64_t rate;
+ /* val is the amount of value available to drain. */
+ uint64_t val;
+ /* tstamp is the last timestamp in second resolution that is known
+ to this object. */
+ uint64_t tstamp;
+} nghttp2_ratelim;
+
+/* nghttp2_ratelim_init initializes |rl| with the given parameters. */
+void nghttp2_ratelim_init(nghttp2_ratelim *rl, uint64_t burst, uint64_t rate);
+
+/* nghttp2_ratelim_update updates rl->val with the current |tstamp|
+ given in second resolution. */
+void nghttp2_ratelim_update(nghttp2_ratelim *rl, uint64_t tstamp);
+
+/* nghttp2_ratelim_drain drains |n| from rl->val. It returns 0 if it
+ succeeds, or -1. */
+int nghttp2_ratelim_drain(nghttp2_ratelim *rl, uint64_t n);
+
+#endif /* NGHTTP2_RATELIM_H */
diff --git a/lib/nghttp2_session.c b/lib/nghttp2_session.c
index 8271198..5ee08df 100644
--- a/lib/nghttp2_session.c
+++ b/lib/nghttp2_session.c
@@ -36,6 +36,7 @@
#include "nghttp2_option.h"
#include "nghttp2_http.h"
#include "nghttp2_pq.h"
+#include "nghttp2_time.h"
#include "nghttp2_debug.h"
/*
@@ -443,6 +444,10 @@ static int session_new(nghttp2_session **session_ptr,
NGHTTP2_DEFAULT_MAX_CONCURRENT_STREAMS;
(*session_ptr)->pending_enable_push = 1;
+ nghttp2_ratelim_init(&(*session_ptr)->stream_reset_ratelim,
+ NGHTTP2_DEFAULT_STREAM_RESET_BURST,
+ NGHTTP2_DEFAULT_STREAM_RESET_RATE);
+
if (server) {
(*session_ptr)->server = 1;
}
@@ -527,6 +532,12 @@ static int session_new(nghttp2_session **session_ptr,
option->max_settings) {
(*session_ptr)->max_settings = option->max_settings;
}
+
+ if (option->opt_set_mask & NGHTTP2_OPT_STREAM_RESET_RATE_LIMIT) {
+ nghttp2_ratelim_init(&(*session_ptr)->stream_reset_ratelim,
+ option->stream_reset_burst,
+ option->stream_reset_rate);
+ }
}
rv = nghttp2_hd_deflate_init2(&(*session_ptr)->hd_deflater,
@@ -4144,6 +4155,23 @@ static int session_process_priority_frame(nghttp2_session *session) {
return nghttp2_session_on_priority_received(session, frame);
}
+static int session_update_stream_reset_ratelim(nghttp2_session *session) {
+ if (!session->server || (session->goaway_flags & NGHTTP2_GOAWAY_SUBMITTED)) {
+ return 0;
+ }
+
+ nghttp2_ratelim_update(&session->stream_reset_ratelim,
+ nghttp2_time_now_sec());
+
+ if (nghttp2_ratelim_drain(&session->stream_reset_ratelim, 1) == 0) {
+ return 0;
+ }
+
+ return nghttp2_session_add_goaway(session, session->last_recv_stream_id,
+ NGHTTP2_INTERNAL_ERROR, NULL, 0,
+ NGHTTP2_GOAWAY_AUX_NONE);
+}
+
int nghttp2_session_on_rst_stream_received(nghttp2_session *session,
nghttp2_frame *frame) {
int rv;
@@ -4173,7 +4201,8 @@ int nghttp2_session_on_rst_stream_received(nghttp2_session *session,
if (nghttp2_is_fatal(rv)) {
return rv;
}
- return 0;
+
+ return session_update_stream_reset_ratelim(session);
}
static int session_process_rst_stream_frame(nghttp2_session *session) {
@@ -6941,6 +6970,9 @@ int nghttp2_session_add_goaway(nghttp2_session *session, int32_t last_stream_id,
nghttp2_mem_free(mem, item);
return rv;
}
+
+ session->goaway_flags |= NGHTTP2_GOAWAY_SUBMITTED;
+
return 0;
}
diff --git a/lib/nghttp2_session.h b/lib/nghttp2_session.h
index e62a3bb..03f8bee 100644
--- a/lib/nghttp2_session.h
+++ b/lib/nghttp2_session.h
@@ -39,6 +39,7 @@
#include "nghttp2_buf.h"
#include "nghttp2_callbacks.h"
#include "nghttp2_mem.h"
+#include "nghttp2_ratelim.h"
/* The global variable for tests where we want to disable strict
preface handling. */
@@ -102,6 +103,10 @@ typedef struct {
/* The default value of maximum number of concurrent streams. */
#define NGHTTP2_DEFAULT_MAX_CONCURRENT_STREAMS 0xffffffffu
+/* The default values for stream reset rate limiter. */
+#define NGHTTP2_DEFAULT_STREAM_RESET_BURST 1000
+#define NGHTTP2_DEFAULT_STREAM_RESET_RATE 33
+
/* Internal state when receiving incoming frame */
typedef enum {
/* Receiving frame header */
@@ -175,7 +180,9 @@ typedef enum {
/* Flag means GOAWAY was sent */
NGHTTP2_GOAWAY_SENT = 0x4,
/* Flag means GOAWAY was received */
- NGHTTP2_GOAWAY_RECV = 0x8
+ NGHTTP2_GOAWAY_RECV = 0x8,
+ /* Flag means GOAWAY has been submitted at least once */
+ NGHTTP2_GOAWAY_SUBMITTED = 0x10
} nghttp2_goaway_flag;
/* nghttp2_inflight_settings stores the SETTINGS entries which local
@@ -229,6 +236,9 @@ struct nghttp2_session {
/* Queue of In-flight SETTINGS values. SETTINGS bearing ACK is not
considered as in-flight. */
nghttp2_inflight_settings *inflight_settings_head;
+ /* Stream reset rate limiter. If receiving excessive amount of
+ stream resets, GOAWAY will be sent. */
+ nghttp2_ratelim stream_reset_ratelim;
/* The number of outgoing streams. This will be capped by
remote_settings.max_concurrent_streams. */
size_t num_outgoing_streams;
diff --git a/lib/nghttp2_time.c b/lib/nghttp2_time.c
new file mode 100644
index 0000000..2a5f1a6
--- /dev/null
+++ b/lib/nghttp2_time.c
@@ -0,0 +1,62 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2023 nghttp2 contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_time.h"
+
+#ifdef HAVE_TIME_H
+# include <time.h>
+#endif /* HAVE_TIME_H */
+
+#ifdef HAVE_SYSINFOAPI_H
+# include <sysinfoapi.h>
+#endif /* HAVE_SYSINFOAPI_H */
+
+#ifndef HAVE_GETTICKCOUNT64
+static uint64_t time_now_sec(void) {
+ time_t t = time(NULL);
+
+ if (t == -1) {
+ return 0;
+ }
+
+ return (uint64_t)t;
+}
+#endif /* HAVE_GETTICKCOUNT64 */
+
+#ifdef HAVE_CLOCK_GETTIME
+uint64_t nghttp2_time_now_sec(void) {
+ struct timespec tp;
+ int rv = clock_gettime(CLOCK_MONOTONIC, &tp);
+
+ if (rv == -1) {
+ return time_now_sec();
+ }
+
+ return (uint64_t)tp.tv_sec;
+}
+#elif defined(HAVE_GETTICKCOUNT64)
+uint64_t nghttp2_time_now_sec(void) { return GetTickCount64() / 1000; }
+#else /* !HAVE_CLOCK_GETTIME && !HAVE_GETTICKCOUNT64 */
+uint64_t nghttp2_time_now_sec(void) { return time_now_sec(); }
+#endif /* !HAVE_CLOCK_GETTIME && !HAVE_GETTICKCOUNT64 */
diff --git a/lib/nghttp2_time.h b/lib/nghttp2_time.h
new file mode 100644
index 0000000..03c0bbe
--- /dev/null
+++ b/lib/nghttp2_time.h
@@ -0,0 +1,38 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2023 nghttp2 contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_TIME_H
+#define NGHTTP2_TIME_H
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+/* nghttp2_time_now_sec returns seconds from implementation-specific
+ timepoint. If it is unable to get seconds, it returns 0. */
+uint64_t nghttp2_time_now_sec(void);
+
+#endif /* NGHTTP2_TIME_H */
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 4250ac3..344c542 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -21,6 +21,7 @@ if(HAVE_CUNIT)
nghttp2_npn_test.c
nghttp2_helper_test.c
nghttp2_buf_test.c
+ nghttp2_ratelim_test.c
)
add_executable(main EXCLUDE_FROM_ALL
diff --git a/tests/Makefile.am b/tests/Makefile.am
index c3e4392..c130a00 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -40,14 +40,16 @@ OBJECTS = main.c nghttp2_pq_test.c nghttp2_map_test.c nghttp2_queue_test.c \
nghttp2_hd_test.c \
nghttp2_npn_test.c \
nghttp2_helper_test.c \
- nghttp2_buf_test.c
+ nghttp2_buf_test.c \
+ nghttp2_ratelim_test.c
HFILES = nghttp2_pq_test.h nghttp2_map_test.h nghttp2_queue_test.h \
nghttp2_session_test.h \
nghttp2_frame_test.h nghttp2_stream_test.h nghttp2_hd_test.h \
nghttp2_npn_test.h nghttp2_helper_test.h \
nghttp2_test_helper.h \
- nghttp2_buf_test.h
+ nghttp2_buf_test.h \
+ nghttp2_ratelim_test.h
main_SOURCES = $(HFILES) $(OBJECTS)
diff --git a/tests/main.c b/tests/main.c
index 1f795cd..334cad8 100644
--- a/tests/main.c
+++ b/tests/main.c
@@ -40,6 +40,7 @@
#include "nghttp2_npn_test.h"
#include "nghttp2_helper_test.h"
#include "nghttp2_buf_test.h"
+#include "nghttp2_ratelim_test.h"
extern int nghttp2_enable_strict_preface;
@@ -323,6 +324,8 @@ int main() {
test_nghttp2_session_no_closed_streams) ||
!CU_add_test(pSuite, "session_set_stream_user_data",
test_nghttp2_session_set_stream_user_data) ||
+ !CU_add_test(pSuite, "session_stream_reset_ratelim",
+ test_nghttp2_session_stream_reset_ratelim) ||
!CU_add_test(pSuite, "http_mandatory_headers",
test_nghttp2_http_mandatory_headers) ||
!CU_add_test(pSuite, "http_content_length",
@@ -418,7 +421,9 @@ int main() {
!CU_add_test(pSuite, "bufs_advance", test_nghttp2_bufs_advance) ||
!CU_add_test(pSuite, "bufs_next_present",
test_nghttp2_bufs_next_present) ||
- !CU_add_test(pSuite, "bufs_realloc", test_nghttp2_bufs_realloc)) {
+ !CU_add_test(pSuite, "bufs_realloc", test_nghttp2_bufs_realloc) ||
+ !CU_add_test(pSuite, "ratelim_update", test_nghttp2_ratelim_update) ||
+ !CU_add_test(pSuite, "ratelim_drain", test_nghttp2_ratelim_drain)) {
CU_cleanup_registry();
return (int)CU_get_error();
}
diff --git a/tests/nghttp2_ratelim_test.c b/tests/nghttp2_ratelim_test.c
new file mode 100644
index 0000000..6abece9
--- /dev/null
+++ b/tests/nghttp2_ratelim_test.c
@@ -0,0 +1,101 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2023 nghttp2 contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_ratelim_test.h"
+
+#include <stdio.h>
+
+#include <CUnit/CUnit.h>
+
+#include "nghttp2_ratelim.h"
+
+void test_nghttp2_ratelim_update(void) {
+ nghttp2_ratelim rl;
+
+ nghttp2_ratelim_init(&rl, 1000, 21);
+
+ CU_ASSERT(1000 == rl.val);
+ CU_ASSERT(1000 == rl.burst);
+ CU_ASSERT(21 == rl.rate);
+ CU_ASSERT(0 == rl.tstamp);
+
+ nghttp2_ratelim_update(&rl, 999);
+
+ CU_ASSERT(1000 == rl.val);
+ CU_ASSERT(999 == rl.tstamp);
+
+ nghttp2_ratelim_drain(&rl, 100);
+
+ CU_ASSERT(900 == rl.val);
+
+ nghttp2_ratelim_update(&rl, 1000);
+
+ CU_ASSERT(921 == rl.val);
+
+ nghttp2_ratelim_update(&rl, 1002);
+
+ CU_ASSERT(963 == rl.val);
+
+ nghttp2_ratelim_update(&rl, 1004);
+
+ CU_ASSERT(1000 == rl.val);
+ CU_ASSERT(1004 == rl.tstamp);
+
+ /* timer skew */
+ nghttp2_ratelim_init(&rl, 1000, 21);
+ nghttp2_ratelim_update(&rl, 1);
+
+ CU_ASSERT(1000 == rl.val);
+
+ nghttp2_ratelim_update(&rl, 0);
+
+ CU_ASSERT(1000 == rl.val);
+
+ /* rate * duration overflow */
+ nghttp2_ratelim_init(&rl, 1000, 100);
+ nghttp2_ratelim_drain(&rl, 999);
+
+ CU_ASSERT(1 == rl.val);
+
+ nghttp2_ratelim_update(&rl, UINT64_MAX);
+
+ CU_ASSERT(1000 == rl.val);
+
+ /* val + rate * duration overflow */
+ nghttp2_ratelim_init(&rl, UINT64_MAX - 1, 2);
+ nghttp2_ratelim_update(&rl, 1);
+
+ CU_ASSERT(UINT64_MAX - 1 == rl.val);
+}
+
+void test_nghttp2_ratelim_drain(void) {
+ nghttp2_ratelim rl;
+
+ nghttp2_ratelim_init(&rl, 100, 7);
+
+ CU_ASSERT(-1 == nghttp2_ratelim_drain(&rl, 101));
+ CU_ASSERT(0 == nghttp2_ratelim_drain(&rl, 51));
+ CU_ASSERT(0 == nghttp2_ratelim_drain(&rl, 49));
+ CU_ASSERT(-1 == nghttp2_ratelim_drain(&rl, 1));
+}
diff --git a/tests/nghttp2_ratelim_test.h b/tests/nghttp2_ratelim_test.h
new file mode 100644
index 0000000..02b2f2b
--- /dev/null
+++ b/tests/nghttp2_ratelim_test.h
@@ -0,0 +1,35 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2023 nghttp2 contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_RATELIM_TEST_H
+#define NGHTTP2_RATELIM_TEST_H
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+void test_nghttp2_ratelim_update(void);
+void test_nghttp2_ratelim_drain(void);
+
+#endif /* NGHTTP2_RATELIM_TEST_H */
diff --git a/tests/nghttp2_session_test.c b/tests/nghttp2_session_test.c
index ab76ab4..dece5c1 100644
--- a/tests/nghttp2_session_test.c
+++ b/tests/nghttp2_session_test.c
@@ -10790,6 +10790,109 @@ void test_nghttp2_session_set_stream_user_data(void) {
nghttp2_session_del(session);
}
+void test_nghttp2_session_stream_reset_ratelim(void) {
+ nghttp2_session *session;
+ nghttp2_session_callbacks callbacks;
+ nghttp2_frame frame;
+ ssize_t rv;
+ nghttp2_bufs bufs;
+ nghttp2_buf *buf;
+ nghttp2_mem *mem;
+ size_t i;
+ nghttp2_hd_deflater deflater;
+ size_t nvlen;
+ nghttp2_nv *nva;
+ int32_t stream_id;
+ nghttp2_outbound_item *item;
+ nghttp2_option *option;
+
+ mem = nghttp2_mem_default();
+ frame_pack_bufs_init(&bufs);
+
+ memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+ callbacks.send_callback = null_send_callback;
+
+ nghttp2_option_new(&option);
+ nghttp2_option_set_stream_reset_rate_limit(
+ option, NGHTTP2_DEFAULT_STREAM_RESET_BURST, 0);
+
+ nghttp2_session_server_new2(&session, &callbacks, NULL, option);
+
+ nghttp2_frame_settings_init(&frame.settings, NGHTTP2_FLAG_NONE, NULL, 0);
+ rv = nghttp2_frame_pack_settings(&bufs, &frame.settings);
+
+ CU_ASSERT(0 == rv);
+
+ nghttp2_frame_settings_free(&frame.settings, mem);
+
+ buf = &bufs.head->buf;
+ rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+ CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+
+ /* Send SETTINGS ACK */
+ rv = nghttp2_session_send(session);
+
+ CU_ASSERT(0 == rv);
+
+ nghttp2_hd_deflate_init(&deflater, mem);
+
+ for (i = 0; i < NGHTTP2_DEFAULT_STREAM_RESET_BURST + 2; ++i) {
+ stream_id = (int32_t)(i * 2 + 1);
+
+ nghttp2_bufs_reset(&bufs);
+
+ /* HEADERS */
+ nvlen = ARRLEN(reqnv);
+ nghttp2_nv_array_copy(&nva, reqnv, nvlen, mem);
+ nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS,
+ stream_id, NGHTTP2_HCAT_HEADERS, NULL, nva,
+ nvlen);
+ rv = nghttp2_frame_pack_headers(&bufs, &frame.headers, &deflater);
+
+ CU_ASSERT(0 == rv);
+
+ nghttp2_frame_headers_free(&frame.headers, mem);
+
+ buf = &bufs.head->buf;
+ rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+ CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+
+ nghttp2_bufs_reset(&bufs);
+
+ /* RST_STREAM */
+ nghttp2_frame_rst_stream_init(&frame.rst_stream, stream_id,
+ NGHTTP2_NO_ERROR);
+ nghttp2_frame_pack_rst_stream(&bufs, &frame.rst_stream);
+ nghttp2_frame_rst_stream_free(&frame.rst_stream);
+
+ buf = &bufs.head->buf;
+ rv = nghttp2_session_mem_recv(session, buf->pos, nghttp2_buf_len(buf));
+
+ CU_ASSERT((ssize_t)nghttp2_buf_len(buf) == rv);
+
+ if (i < NGHTTP2_DEFAULT_STREAM_RESET_BURST) {
+ CU_ASSERT(0 == nghttp2_outbound_queue_size(&session->ob_reg));
+
+ continue;
+ }
+
+ CU_ASSERT(1 == nghttp2_outbound_queue_size(&session->ob_reg));
+
+ item = nghttp2_session_get_next_ob_item(session);
+
+ CU_ASSERT(NGHTTP2_GOAWAY == item->frame.hd.type);
+ CU_ASSERT(NGHTTP2_DEFAULT_STREAM_RESET_BURST * 2 + 1 ==
+ item->frame.goaway.last_stream_id);
+ }
+
+ nghttp2_hd_deflate_free(&deflater);
+ nghttp2_session_del(session);
+ nghttp2_bufs_free(&bufs);
+ nghttp2_option_del(option);
+}
+
static void check_nghttp2_http_recv_headers_fail(
nghttp2_session *session, nghttp2_hd_deflater *deflater, int32_t stream_id,
int stream_state, const nghttp2_nv *nva, size_t nvlen) {
diff --git a/tests/nghttp2_session_test.h b/tests/nghttp2_session_test.h
index c5095c2..2b74e88 100644
--- a/tests/nghttp2_session_test.h
+++ b/tests/nghttp2_session_test.h
@@ -160,6 +160,7 @@ void test_nghttp2_session_removed_closed_stream(void);
void test_nghttp2_session_pause_data(void);
void test_nghttp2_session_no_closed_streams(void);
void test_nghttp2_session_set_stream_user_data(void);
+void test_nghttp2_session_stream_reset_ratelim(void);
void test_nghttp2_http_mandatory_headers(void);
void test_nghttp2_http_content_length(void);
void test_nghttp2_http_content_length_mismatch(void);
--
2.41.0

9
nghttp2.spec
View File

@ -1,7 +1,7 @@
Summary: Experimental HTTP/2 client, server and proxy
Name: nghttp2
Version: 1.33.0
Release: 4%{?dist}
Release: 5%{?dist}
License: MIT
Group: Applications/Internet
URL: https://nghttp2.org/
@ -13,6 +13,9 @@ Patch1: nghttp2-1.31.1-CVE-2019-9511-and-CVE-2019-9513.patch
# prevent DoS caused by overly large SETTINGS frames (CVE-2020-11080)
Patch2: nghttp2-1.33.0-CVE-2020-11080.patch
# fix HTTP/2 Rapid Reset (CVE-2023-44487)
Patch3: 0003-nghttp2-1.33.0-CVE-2023-44487.patch
BuildRequires: automake
BuildRequires: libtool
@ -56,6 +59,7 @@ for building applications with libnghttp2.
%setup -q
%patch1 -p1
%patch2 -p1
%patch3 -p1
autoreconf -fiv
# make fetch-ocsp-response use Python 3
@ -127,6 +131,9 @@ make %{?_smp_mflags} check
%changelog
* Fri Oct 13 2023 Jan Macku <jamacku@redhat.com> - 1.33.0-5
- fix HTTP/2 Rapid Reset (CVE-2023-44487)
* Tue Jun 09 2020 Kamil Dudka <kdudka@redhat.com> 1.33.0-4
- prevent DoS caused by overly large SETTINGS frames (CVE-2020-11080)