Security Advisory - openssl - CVE-2013-6449

The ssl_get_algorithm2 function in ssl/s3_lib.c in OpenSSL before 1.0.2
obtains a certain version number from an incorrect data structure, which
allows remote attackers to cause a denial of service (daemon crash) via
crafted traffic from a TLS 1.2 client.

(From OE-Core master rev: 3e0ac7357a962e3ef6595d21ec4843b078a764dd)

(From OE-Core rev: 33b6441429603b82cfca3d35e68e47e1ca021fd7)

Signed-off-by: Yue Tao <Yue.Tao@windriver.com>
Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Yue Tao 2014-04-08 19:15:07 +01:00 committed by Richard Purdie
parent 0cdc1147d3
commit 7f9dd3ff42
2 changed files with 34 additions and 0 deletions

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@ -0,0 +1,33 @@
From ca989269a2876bae79393bd54c3e72d49975fc75 Mon Sep 17 00:00:00 2001
From: "Dr. Stephen Henson" <steve@openssl.org>
Date: Thu, 19 Dec 2013 14:37:39 +0000
Subject: [PATCH] Use version in SSL_METHOD not SSL structure.
Upstream-Status: Backport
commit ca989269a2876bae79393bd54c3e72d49975fc75 upstream
When deciding whether to use TLS 1.2 PRF and record hash algorithms
use the version number in the corresponding SSL_METHOD structure
instead of the SSL structure. The SSL structure version is sometimes
inaccurate. Note: OpenSSL 1.0.2 and later effectively do this already.
(CVE-2013-6449)
---
ssl/s3_lib.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/ssl/s3_lib.c b/ssl/s3_lib.c
index bf832bb..c4ef273 100644
--- a/ssl/s3_lib.c
+++ b/ssl/s3_lib.c
@@ -4286,7 +4286,7 @@ need to go to SSL_ST_ACCEPT.
long ssl_get_algorithm2(SSL *s)
{
long alg2 = s->s3->tmp.new_cipher->algorithm2;
- if (TLS1_get_version(s) >= TLS1_2_VERSION &&
+ if (s->method->version == TLS1_2_VERSION &&
alg2 == (SSL_HANDSHAKE_MAC_DEFAULT|TLS1_PRF))
return SSL_HANDSHAKE_MAC_SHA256 | TLS1_PRF_SHA256;
return alg2;
--
1.7.5.4

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@ -36,6 +36,7 @@ SRC_URI += "file://configure-targets.patch \
file://find.pl \
file://0001-Fix-for-TLS-record-tampering-bug-CVE-2013-4353.patch \
file://0001-Fix-DTLS-retransmission-from-previous-session.patch \
file://0001-Use-version-in-SSL_METHOD-not-SSL-structure.patch \
"
SRC_URI[md5sum] = "66bf6f10f060d561929de96f9dfe5b8c"