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openssl: fix CVE-2014-3470

Browse Source 
http://www.openssl.org/news/secadv_20140605.txt

Anonymous ECDH denial of service (CVE-2014-3470)

OpenSSL TLS clients enabling anonymous ECDH ciphersuites are subject to a
denial of service attack.

(Patch borrowed from Fedora.)

(From OE-Core rev: 595f2fc7dd642d729ab61f20a6719a2cc6c80426)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Paul Eggleton
2014-06-09 16:51:20 +01:00
committed by Richard Purdie
parent 96ca984621
commit 3428e6e0e4
2 changed files with 32 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
meta/recipes-connectivity/openssl/openssl/openssl-1.0.1e-cve-2014-3470.patch Normal file
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@@ -0,0 +1,31 @@
commit 4ad43d511f6cf064c66eb4bfd0fb0919b5dd8a86
Author: Dr. Stephen Henson <steve@openssl.org>
Date: Thu May 29 15:00:05 2014 +0100
Fix CVE-2014-3470
Check session_cert is not NULL before dereferencing it.
Patch borrowed from Fedora
Upstream-Status: Backport
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
diff --git a/ssl/s3_clnt.c b/ssl/s3_clnt.c
index d35376d..4324f8d 100644
--- a/ssl/s3_clnt.c
+++ b/ssl/s3_clnt.c
@@ -2511,6 +2511,13 @@ int ssl3_send_client_key_exchange(SSL *s)
int ecdh_clnt_cert = 0;
int field_size = 0;
+ if (s->session->sess_cert == NULL)
+ {
+ ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
+ SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
+ goto err;
+ }
+
/* Did we send out the client's
* ECDH share for use in premaster
* computation as part of client certificate?

1
meta/recipes-connectivity/openssl/openssl_1.0.1g.bb
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@@ -38,6 +38,7 @@ SRC_URI += "file://configure-targets.patch \
file://openssl-1.0.1e-cve-2014-0198.patch \
file://openssl-1.0.1e-cve-2014-0221.patch \
file://openssl-1.0.1e-cve-2014-0224.patch \
file://openssl-1.0.1e-cve-2014-3470.patch \
file://openssl-CVE-2010-5298.patch \
"