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import mod_http2-1.15.7-3.module+el8.4.0+8625+d397f3da

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CentOS Sources 2021-03-30 12:50:58 -04:00 committed by Stepan Oksanichenko
parent 51b909f5ab
commit 733bd757cc
3 changed files with 523 additions and 1 deletions
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119
SOURCES/mod_http2-1.15.7-CVE-2020-11993.patch Normal file
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@ -0,0 +1,119 @@
diff --git a/mod_http2/h2_mplx.c b/mod_http2/h2_mplx.c
index c3d590d..33ea45e 100644
--- a/mod_http2/h2_mplx.c
+++ b/mod_http2/h2_mplx.c
@@ -56,7 +56,7 @@ typedef struct {
apr_size_t count;
} stream_iter_ctx;
-static apr_status_t mplx_be_happy(h2_mplx *m);
+static apr_status_t mplx_be_happy(h2_mplx *m, h2_task *task);
static apr_status_t mplx_be_annoyed(h2_mplx *m);
apr_status_t h2_mplx_child_init(apr_pool_t *pool, server_rec *s)
@@ -526,10 +526,10 @@ static apr_status_t out_open(h2_mplx *m, int stream_id, h2_bucket_beam *beam)
stream->output = beam;
if (APLOGctrace2(m->c)) {
- h2_beam_log(beam, m->c, APLOG_TRACE2, "out_open");
+ h2_beam_log(beam, stream->task->c, APLOG_TRACE2, "out_open");
}
else {
- ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, m->c,
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, stream->task->c,
"h2_mplx(%s): out open", stream->task->id);
}
@@ -579,10 +579,10 @@ static apr_status_t out_close(h2_mplx *m, h2_task *task)
return APR_ECONNABORTED;
}
- ap_log_cerror(APLOG_MARK, APLOG_TRACE2, status, m->c,
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE2, status, task->c,
"h2_mplx(%s): close", task->id);
status = h2_beam_close(task->output.beam);
- h2_beam_log(task->output.beam, m->c, APLOG_TRACE2, "out_close");
+ h2_beam_log(task->output.beam, task->c, APLOG_TRACE2, "out_close");
output_consumed_signal(m, task);
check_data_for(m, stream, 1);
return status;
@@ -782,18 +782,18 @@ static void task_done(h2_mplx *m, h2_task *task)
{
h2_stream *stream;
- ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, m->c,
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, task->c,
"h2_mplx(%ld): task(%s) done", m->id, task->id);
out_close(m, task);
task->worker_done = 1;
task->done_at = apr_time_now();
- ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, m->c,
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, task->c,
"h2_mplx(%s): request done, %f ms elapsed", task->id,
(task->done_at - task->started_at) / 1000.0);
if (task->c && !task->c->aborted && task->started_at > m->last_mood_change) {
- mplx_be_happy(m);
+ mplx_be_happy(m, task);
}
ap_assert(task->done_done == 0);
@@ -805,13 +805,13 @@ static void task_done(h2_mplx *m, h2_task *task)
/* reset and schedule again */
h2_task_redo(task);
h2_iq_add(m->q, stream->id, NULL, NULL);
- ap_log_cerror(APLOG_MARK, APLOG_INFO, 0, m->c,
+ ap_log_cerror(APLOG_MARK, APLOG_INFO, 0, task->c,
H2_STRM_MSG(stream, "redo, added to q"));
}
else {
/* stream not cleaned up, stay around */
task->done_done = 1;
- ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, m->c,
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, task->c,
H2_STRM_MSG(stream, "task_done, stream open"));
if (stream->input) {
h2_beam_leave(stream->input);
@@ -824,7 +824,7 @@ static void task_done(h2_mplx *m, h2_task *task)
else if ((stream = h2_ihash_get(m->shold, task->stream_id)) != NULL) {
/* stream is done, was just waiting for this. */
task->done_done = 1;
- ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, m->c,
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, task->c,
H2_STRM_MSG(stream, "task_done, in hold"));
if (stream->input) {
h2_beam_leave(stream->input);
@@ -832,12 +832,12 @@ static void task_done(h2_mplx *m, h2_task *task)
stream_joined(m, stream);
}
else if ((stream = h2_ihash_get(m->spurge, task->stream_id)) != NULL) {
- ap_log_cerror(APLOG_MARK, APLOG_WARNING, 0, m->c,
+ ap_log_cerror(APLOG_MARK, APLOG_WARNING, 0, task->c,
H2_STRM_LOG(APLOGNO(03517), stream, "already in spurge"));
ap_assert("stream should not be in spurge" == NULL);
}
else {
- ap_log_cerror(APLOG_MARK, APLOG_WARNING, 0, m->c, APLOGNO(03518)
+ ap_log_cerror(APLOG_MARK, APLOG_WARNING, 0, task->c, APLOGNO(03518)
"h2_mplx(%s): task_done, stream not found",
task->id);
ap_assert("stream should still be available" == NULL);
@@ -963,7 +963,7 @@ static apr_status_t unschedule_slow_tasks(h2_mplx *m)
return rv;
}
-static apr_status_t mplx_be_happy(h2_mplx *m)
+static apr_status_t mplx_be_happy(h2_mplx *m, h2_task *task)
{
apr_time_t now;
@@ -975,7 +975,7 @@ static apr_status_t mplx_be_happy(h2_mplx *m)
m->limit_active = H2MIN(m->limit_active * 2, m->max_active);
m->last_mood_change = now;
m->irritations_since = 0;
- ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, m->c,
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, task->c,
"h2_mplx(%ld): mood update, increasing worker limit to %d",
m->id, m->limit_active);
}

391
SOURCES/mod_http2-1.15.7-CVE-2020-9490.patch Normal file
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@ -0,0 +1,391 @@
From b8a8c5061eada0ce3339b24ba1d587134552bc0c Mon Sep 17 00:00:00 2001
From: Stefan Eissing <stefan.eissing@greenbytes.de>
Date: Wed, 29 Jul 2020 14:41:38 +0200
Subject: [PATCH] * Removing support for abandoned draft of http-wg regarding
cache-digests.
---
diff --git a/mod_http2/h2_push.c b/mod_http2/h2_push.c
index 4a70674..8ae0b49 100644
--- a/mod_http2/h2_push.c
+++ b/mod_http2/h2_push.c
@@ -464,33 +464,6 @@ apr_array_header_t *h2_push_collect(apr_pool_t *p, const h2_request *req,
return NULL;
}
-/*******************************************************************************
- * push diary
- *
- * - The push diary keeps track of resources already PUSHed via HTTP/2 on this
- * connection. It records a hash value from the absolute URL of the resource
- * pushed.
- * - Lacking openssl, it uses 'apr_hashfunc_default' for the value
- * - with openssl, it uses SHA256 to calculate the hash value
- * - whatever the method to generate the hash, the diary keeps a maximum of 64
- * bits per hash, limiting the memory consumption to about
- * H2PushDiarySize * 8
- * bytes. Entries are sorted by most recently used and oldest entries are
- * forgotten first.
- * - Clients can initialize/replace the push diary by sending a 'Cache-Digest'
- * header. Currently, this is the base64url encoded value of the cache digest
- * as specified in https://datatracker.ietf.org/doc/draft-kazuho-h2-cache-digest/
- * This draft can be expected to evolve and the definition of the header
- * will be added there and refined.
- * - The cache digest header is a Golomb Coded Set of hash values, but it may
- * limit the amount of bits per hash value even further. For a good description
- * of GCS, read here:
- * http://giovanni.bajo.it/post/47119962313/golomb-coded-sets-smaller-than-bloom-filters
- * - The means that the push diary might be initialized with hash values of much
- * less than 64 bits, leading to more false positives, but smaller digest size.
- ******************************************************************************/
-
-
#define GCSLOG_LEVEL APLOG_TRACE1
typedef struct h2_push_diary_entry {
@@ -618,38 +591,48 @@ static int h2_push_diary_find(h2_push_diary *diary, apr_uint64_t hash)
return -1;
}
-static h2_push_diary_entry *move_to_last(h2_push_diary *diary, apr_size_t idx)
+static void move_to_last(h2_push_diary *diary, apr_size_t idx)
{
h2_push_diary_entry *entries = (h2_push_diary_entry*)diary->entries->elts;
h2_push_diary_entry e;
- apr_size_t lastidx = (apr_size_t)diary->entries->nelts;
+ int lastidx;
+ /* Move an existing entry to the last place */
+ if (diary->entries->nelts <= 0)
+ return;
+
/* move entry[idx] to the end */
- if (idx+1 < lastidx) {
+ lastidx = diary->entries->nelts - 1;
+ if (idx < lastidx) {
e = entries[idx];
- memmove(entries+idx, entries+idx+1, sizeof(e) * (lastidx - idx));
+ memmove(entries+idx, entries+idx+1, sizeof(h2_push_diary_entry) * (lastidx - idx));
entries[lastidx] = e;
}
- return &entries[lastidx];
}
-static void h2_push_diary_append(h2_push_diary *diary, h2_push_diary_entry *e)
+static void remove_first(h2_push_diary *diary)
{
- h2_push_diary_entry *ne;
+ h2_push_diary_entry *entries = (h2_push_diary_entry*)diary->entries->elts;
+ int lastidx;
- if (diary->entries->nelts < diary->N) {
- /* append a new diary entry at the end */
- APR_ARRAY_PUSH(diary->entries, h2_push_diary_entry) = *e;
- ne = &APR_ARRAY_IDX(diary->entries, diary->entries->nelts-1, h2_push_diary_entry);
+ /* move remaining entries to index 0 */
+ lastidx = diary->entries->nelts - 1;
+ if (lastidx > 0) {
+ --diary->entries->nelts;
+ memmove(entries, entries+1, sizeof(h2_push_diary_entry) * diary->entries->nelts);
}
- else {
- /* replace content with new digest. keeps memory usage constant once diary is full */
- ne = move_to_last(diary, 0);
- *ne = *e;
+}
+
+static void h2_push_diary_append(h2_push_diary *diary, h2_push_diary_entry *e)
+{
+ while (diary->entries->nelts >= diary->N) {
+ remove_first(diary);
}
+ /* append a new diary entry at the end */
+ APR_ARRAY_PUSH(diary->entries, h2_push_diary_entry) = *e;
/* Intentional no APLOGNO */
ap_log_perror(APLOG_MARK, GCSLOG_LEVEL, 0, diary->entries->pool,
- "push_diary_append: %"APR_UINT64_T_HEX_FMT, ne->hash);
+ "push_diary_append: %"APR_UINT64_T_HEX_FMT, e->hash);
}
apr_array_header_t *h2_push_diary_update(h2_session *session, apr_array_header_t *pushes)
@@ -692,30 +675,12 @@ apr_array_header_t *h2_push_collect_update(h2_stream *stream,
const struct h2_request *req,
const struct h2_headers *res)
{
- h2_session *session = stream->session;
- const char *cache_digest = apr_table_get(req->headers, "Cache-Digest");
apr_array_header_t *pushes;
- apr_status_t status;
- if (cache_digest && session->push_diary) {
- status = h2_push_diary_digest64_set(session->push_diary, req->authority,
- cache_digest, stream->pool);
- if (status != APR_SUCCESS) {
- ap_log_cerror(APLOG_MARK, APLOG_DEBUG, status, session->c,
- H2_SSSN_LOG(APLOGNO(03057), session,
- "push diary set from Cache-Digest: %s"), cache_digest);
- }
- }
pushes = h2_push_collect(stream->pool, req, stream->push_policy, res);
return h2_push_diary_update(stream->session, pushes);
}
-static apr_int32_t h2_log2inv(unsigned char log2)
-{
- return log2? (1 << log2) : 1;
-}
-
-
typedef struct {
h2_push_diary *diary;
unsigned char log2p;
@@ -830,11 +795,6 @@ apr_status_t h2_push_diary_digest_get(h2_push_diary *diary, apr_pool_t *pool,
apr_size_t hash_count;
nelts = diary->entries->nelts;
-
- if ((apr_uint32_t)nelts > APR_UINT32_MAX) {
- /* should not happen */
- return APR_ENOTIMPL;
- }
N = ceil_power_of_2(nelts);
log2n = h2_log2(N);
@@ -896,166 +856,3 @@ apr_status_t h2_push_diary_digest_get(h2_push_diary *diary, apr_pool_t *pool,
return APR_SUCCESS;
}
-typedef struct {
- h2_push_diary *diary;
- apr_pool_t *pool;
- unsigned char log2p;
- const unsigned char *data;
- apr_size_t datalen;
- apr_size_t offset;
- unsigned int bit;
- apr_uint64_t last_val;
-} gset_decoder;
-
-static int gset_decode_next_bit(gset_decoder *decoder)
-{
- if (++decoder->bit >= 8) {
- if (++decoder->offset >= decoder->datalen) {
- return -1;
- }
- decoder->bit = 0;
- }
- return (decoder->data[decoder->offset] & cbit_mask[decoder->bit])? 1 : 0;
-}
-
-static apr_status_t gset_decode_next(gset_decoder *decoder, apr_uint64_t *phash)
-{
- apr_uint64_t flex = 0, fixed = 0, delta;
- int i;
-
- /* read 1 bits until we encounter 0, then read log2n(diary-P) bits.
- * On a malformed bit-string, this will not fail, but produce results
- * which are pbly too large. Luckily, the diary will modulo the hash.
- */
- while (1) {
- int bit = gset_decode_next_bit(decoder);
- if (bit == -1) {
- return APR_EINVAL;
- }
- if (!bit) {
- break;
- }
- ++flex;
- }
-
- for (i = 0; i < decoder->log2p; ++i) {
- int bit = gset_decode_next_bit(decoder);
- if (bit == -1) {
- return APR_EINVAL;
- }
- fixed = (fixed << 1) | bit;
- }
-
- delta = (flex << decoder->log2p) | fixed;
- *phash = delta + decoder->last_val;
- decoder->last_val = *phash;
-
- /* Intentional no APLOGNO */
- ap_log_perror(APLOG_MARK, GCSLOG_LEVEL, 0, decoder->pool,
- "h2_push_diary_digest_dec: val=%"APR_UINT64_T_HEX_FMT", delta=%"
- APR_UINT64_T_HEX_FMT", flex=%d, fixed=%"APR_UINT64_T_HEX_FMT,
- *phash, delta, (int)flex, fixed);
-
- return APR_SUCCESS;
-}
-
-/**
- * Initialize the push diary by a cache digest as described in
- * https://datatracker.ietf.org/doc/draft-kazuho-h2-cache-digest/
- * .
- * @param diary the diary to set the digest into
- * @param data the binary cache digest
- * @param len the length of the cache digest
- * @return APR_EINVAL if digest was not successfully parsed
- */
-apr_status_t h2_push_diary_digest_set(h2_push_diary *diary, const char *authority,
- const char *data, apr_size_t len)
-{
- gset_decoder decoder;
- unsigned char log2n, log2p;
- int N, i;
- apr_pool_t *pool = diary->entries->pool;
- h2_push_diary_entry e;
- apr_status_t status = APR_SUCCESS;
-
- if (len < 2) {
- /* at least this should be there */
- return APR_EINVAL;
- }
- log2n = data[0];
- log2p = data[1];
- diary->mask_bits = log2n + log2p;
- if (diary->mask_bits > 64) {
- /* cannot handle */
- return APR_ENOTIMPL;
- }
-
- /* whatever is in the digest, it replaces the diary entries */
- apr_array_clear(diary->entries);
- if (!authority || !strcmp("*", authority)) {
- diary->authority = NULL;
- }
- else if (!diary->authority || strcmp(diary->authority, authority)) {
- diary->authority = apr_pstrdup(diary->entries->pool, authority);
- }
-
- N = h2_log2inv(log2n + log2p);
-
- decoder.diary = diary;
- decoder.pool = pool;
- decoder.log2p = log2p;
- decoder.data = (const unsigned char*)data;
- decoder.datalen = len;
- decoder.offset = 1;
- decoder.bit = 8;
- decoder.last_val = 0;
-
- diary->N = N;
- /* Determine effective N we use for storage */
- if (!N) {
- /* a totally empty cache digest. someone tells us that she has no
- * entries in the cache at all. Use our own preferences for N+mask
- */
- diary->N = diary->NMax;
- return APR_SUCCESS;
- }
- else if (N > diary->NMax) {
- /* Store not more than diary is configured to hold. We open us up
- * to DOS attacks otherwise. */
- diary->N = diary->NMax;
- }
-
- /* Intentional no APLOGNO */
- ap_log_perror(APLOG_MARK, GCSLOG_LEVEL, 0, pool,
- "h2_push_diary_digest_set: N=%d, log2n=%d, "
- "diary->mask_bits=%d, dec.log2p=%d",
- (int)diary->N, (int)log2n, diary->mask_bits,
- (int)decoder.log2p);
-
- for (i = 0; i < diary->N; ++i) {
- if (gset_decode_next(&decoder, &e.hash) != APR_SUCCESS) {
- /* the data may have less than N values */
- break;
- }
- h2_push_diary_append(diary, &e);
- }
-
- /* Intentional no APLOGNO */
- ap_log_perror(APLOG_MARK, GCSLOG_LEVEL, 0, pool,
- "h2_push_diary_digest_set: diary now with %d entries, mask_bits=%d",
- (int)diary->entries->nelts, diary->mask_bits);
- return status;
-}
-
-apr_status_t h2_push_diary_digest64_set(h2_push_diary *diary, const char *authority,
- const char *data64url, apr_pool_t *pool)
-{
- const char *data;
- apr_size_t len = h2_util_base64url_decode(&data, data64url, pool);
- /* Intentional no APLOGNO */
- ap_log_perror(APLOG_MARK, GCSLOG_LEVEL, 0, pool,
- "h2_push_diary_digest64_set: digest=%s, dlen=%d",
- data64url, (int)len);
- return h2_push_diary_digest_set(diary, authority, data, len);
-}
-
diff --git a/mod_http2/h2_push.h b/mod_http2/h2_push.h
index 0533853..5dc189f 100644
--- a/mod_http2/h2_push.h
+++ b/mod_http2/h2_push.h
@@ -35,6 +35,44 @@ typedef enum {
H2_PUSH_DIGEST_SHA256
} h2_push_digest_type;
+/*******************************************************************************
+ * push diary
+ *
+ * - The push diary keeps track of resources already PUSHed via HTTP/2 on this
+ * connection. It records a hash value from the absolute URL of the resource
+ * pushed.
+ * - Lacking openssl,
+ * - with openssl, it uses SHA256 to calculate the hash value, otherwise it
+ * falls back to apr_hashfunc_default()
+ * - whatever the method to generate the hash, the diary keeps a maximum of 64
+ * bits per hash, limiting the memory consumption to about
+ * H2PushDiarySize * 8
+ * bytes. Entries are sorted by most recently used and oldest entries are
+ * forgotten first.
+ * - While useful by itself to avoid duplicated PUSHes on the same connection,
+ * the original idea was that clients provided a 'Cache-Digest' header with
+ * the values of *their own* cached resources. This was described in
+ * <https://datatracker.ietf.org/doc/draft-kazuho-h2-cache-digest/>
+ * and some subsequent revisions that tweaked values but kept the overall idea.
+ * - The draft was abandoned by the IETF http-wg, as support from major clients,
+ * e.g. browsers, was lacking for various reasons.
+ * - For these reasons, mod_h2 abandoned its support for client supplied values
+ * but keeps the diary. It seems to provide value for applications using PUSH,
+ * is configurable in size and defaults to a very moderate amount of memory
+ * used.
+ * - The cache digest header is a Golomb Coded Set of hash values, but it may
+ * limit the amount of bits per hash value even further. For a good description
+ * of GCS, read here:
+ * <http://giovanni.bajo.it/post/47119962313/golomb-coded-sets-smaller-than-bloom-filters>
+ ******************************************************************************/
+
+
+/*
+ * The push diary is based on the abandoned draft
+ * <https://datatracker.ietf.org/doc/draft-kazuho-h2-cache-digest/>
+ * that describes how to use golomb filters.
+ */
+
typedef struct h2_push_diary h2_push_diary;
typedef void h2_push_digest_calc(h2_push_diary *diary, apr_uint64_t *phash, h2_push *push);
@@ -101,20 +139,4 @@ apr_status_t h2_push_diary_digest_get(h2_push_diary *diary, apr_pool_t *p,
int maxP, const char *authority,
const char **pdata, apr_size_t *plen);
-/**
- * Initialize the push diary by a cache digest as described in
- * https://datatracker.ietf.org/doc/draft-kazuho-h2-cache-digest/
- * .
- * @param diary the diary to set the digest into
- * @param authority the authority to set the data for
- * @param data the binary cache digest
- * @param len the length of the cache digest
- * @return APR_EINVAL if digest was not successfully parsed
- */
-apr_status_t h2_push_diary_digest_set(h2_push_diary *diary, const char *authority,
- const char *data, apr_size_t len);
-
-apr_status_t h2_push_diary_digest64_set(h2_push_diary *diary, const char *authority,
- const char *data64url, apr_pool_t *pool);
-
#endif /* defined(__mod_h2__h2_push__) */

14
SPECS/mod_http2.spec
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@ -3,12 +3,14 @@
Name: mod_http2
Version: 1.15.7
Release: 1%{?dist}
Release: 3%{?dist}
Summary: module implementing HTTP/2 for Apache 2
Group: System Environment/Daemons
License: ASL 2.0
URL: https://icing.github.io/mod_h2/
Source0: https://github.com/icing/mod_h2/releases/download/v%{version}/mod_http2-%{version}.tar.gz
Patch1: mod_http2-1.15.7-CVE-2020-9490.patch
Patch2: mod_http2-1.15.7-CVE-2020-11993.patch
BuildRequires: pkgconfig, httpd-devel >= 2.4.20, libnghttp2-devel >= 1.7.0, openssl-devel >= 1.0.2
Requires: httpd-mmn = %{_httpd_mmn}
Conflicts: httpd < 2.4.25-8
@ -20,6 +22,8 @@ top of libnghttp2 for httpd 2.4 servers.
%prep
%setup -q
%patch1 -p1 -b .CVE-2020-9490
%patch2 -p1 -b .CVE-2020-11993
%build
%configure
@ -46,6 +50,14 @@ make check
%{_httpd_moddir}/mod_proxy_http2.so
%changelog
* Fri Oct 30 2020 Lubos Uhliarik <luhliari@redhat.com> - 1.15.7-3
- Resolves: #1869077 - CVE-2020-11993 httpd:2.4/mod_http2: httpd:
mod_http2 concurrent pool usage
* Mon Aug 17 2020 Lubos Uhliarik <luhliari@redhat.com> - 1.15.7-2
- Resolves: #1869073 - CVE-2020-9490 httpd:2.4/mod_http2: httpd:
Push diary crash on specifically crafted HTTP/2 header
* Tue Apr 14 2020 Lubos Uhliarik <luhliari@redhat.com> - 1.15.7-1
- new version 1.15.7
- Resolves: #1814236 - RFE: mod_http2 rebase