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Resolves: CVE-2022-43552 - smb/telnet: fix use-after-free when HTTP proxy denies tunnel

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This commit is contained in:
Kamil Dudka 2022-12-21 15:31:04 +01:00
parent 09780ef69d
commit eab48830b3
2 changed files with 89 additions and 1 deletions
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81
0023-curl-7.76.1-CVE-2022-43552.patch Normal file
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@ -0,0 +1,81 @@
From 5cdcf1dbd39c64e18a81fc912a36942a3ec87565 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 19 Dec 2022 08:38:37 +0100
Subject: [PATCH] smb/telnet: do not free the protocol struct in *_done()
It is managed by the generic layer.
Reported-by: Trail of Bits
Closes #10112
Upstream-commit: 4f20188ac644afe174be6005ef4f6ffba232b8b2
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
---
lib/smb.c | 14 ++------------
lib/telnet.c | 3 ---
2 files changed, 2 insertions(+), 15 deletions(-)
diff --git a/lib/smb.c b/lib/smb.c
index 039d680..f682c1f 100644
--- a/lib/smb.c
+++ b/lib/smb.c
@@ -60,8 +60,6 @@ static CURLcode smb_connect(struct Curl_easy *data, bool *done);
static CURLcode smb_connection_state(struct Curl_easy *data, bool *done);
static CURLcode smb_do(struct Curl_easy *data, bool *done);
static CURLcode smb_request_state(struct Curl_easy *data, bool *done);
-static CURLcode smb_done(struct Curl_easy *data, CURLcode status,
- bool premature);
static CURLcode smb_disconnect(struct Curl_easy *data,
struct connectdata *conn, bool dead);
static int smb_getsock(struct Curl_easy *data, struct connectdata *conn,
@@ -76,7 +74,7 @@ const struct Curl_handler Curl_handler_smb = {
"SMB", /* scheme */
smb_setup_connection, /* setup_connection */
smb_do, /* do_it */
- smb_done, /* done */
+ ZERO_NULL, /* done */
ZERO_NULL, /* do_more */
smb_connect, /* connect_it */
smb_connection_state, /* connecting */
@@ -103,7 +101,7 @@ const struct Curl_handler Curl_handler_smbs = {
"SMBS", /* scheme */
smb_setup_connection, /* setup_connection */
smb_do, /* do_it */
- smb_done, /* done */
+ ZERO_NULL, /* done */
ZERO_NULL, /* do_more */
smb_connect, /* connect_it */
smb_connection_state, /* connecting */
@@ -941,14 +939,6 @@ static CURLcode smb_request_state(struct Curl_easy *data, bool *done)
return CURLE_OK;
}
-static CURLcode smb_done(struct Curl_easy *data, CURLcode status,
- bool premature)
-{
- (void) premature;
- Curl_safefree(data->req.p.smb);
- return status;
-}
-
static CURLcode smb_disconnect(struct Curl_easy *data,
struct connectdata *conn, bool dead)
{
diff --git a/lib/telnet.c b/lib/telnet.c
index 923c7f8..48cd0d7 100644
--- a/lib/telnet.c
+++ b/lib/telnet.c
@@ -1248,9 +1248,6 @@ static CURLcode telnet_done(struct Curl_easy *data,
curl_slist_free_all(tn->telnet_vars);
tn->telnet_vars = NULL;
-
- Curl_safefree(data->req.p.telnet);
-
return CURLE_OK;
}
--
2.38.1

9
curl.spec
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@ -1,7 +1,7 @@
Summary: A utility for getting files from remote servers (FTP, HTTP, and others)
Name: curl
Version: 7.76.1
Release: 21%{?dist}
Release: 22%{?dist}
License: MIT
Source: https://curl.se/download/%{name}-%{version}.tar.xz
@ -68,6 +68,9 @@ Patch21: 0021-curl-7.76.1-CVE-2022-35252.patch
# fix POST following PUT confusion (CVE-2022-32221)
Patch22: 0022-curl-7.76.1-CVE-2022-32221.patch
# smb/telnet: fix use-after-free when HTTP proxy denies tunnel (CVE-2022-43552)
Patch23: 0023-curl-7.76.1-CVE-2022-43552.patch
# patch making libcurl multilib ready
Patch101: 0101-curl-7.32.0-multilib.patch
@ -264,6 +267,7 @@ be installed.
%patch20 -p1
%patch21 -p1
%patch22 -p1
%patch23 -p1
# Fedora patches
%patch101 -p1
@ -489,6 +493,9 @@ rm -f ${RPM_BUILD_ROOT}%{_libdir}/libcurl.la
%{_libdir}/libcurl.so.4.[0-9].[0-9].minimal
%changelog
* Wed Dec 21 2022 Kamil Dudka <kdudka@redhat.com> - 7.76.1-22
- smb/telnet: fix use-after-free when HTTP proxy denies tunnel (CVE-2022-43552)
* Wed Oct 26 2022 Kamil Dudka <kdudka@redhat.com> - 7.76.1-21
- fix POST following PUT confusion (CVE-2022-32221)