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openssl: fix CVE-2014-0221

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

DTLS recursion flaw (CVE-2014-0221)

By sending an invalid DTLS handshake to an OpenSSL DTLS client the code
can be made to recurse eventually crashing in a DoS attack.

Only applications using OpenSSL as a DTLS client are affected.

(Patch borrowed from Fedora.)

(From OE-Core rev: 833920fadd58fe353d27f94f340e3a9f6923afb8)

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 16:51:18 +01:00
committed by Richard Purdie
parent b4b50e52d2
commit 8386f4203d
2 changed files with 39 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
meta/recipes-connectivity/openssl/openssl/openssl-1.0.1e-cve-2014-0221.patch Normal file
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@@ -0,0 +1,38 @@
commit d30e582446b027868cdabd0994681643682045a4
Author: Dr. Stephen Henson <steve@openssl.org>
Date: Fri May 16 13:00:45 2014 +0100
Fix CVE-2014-0221
Unnecessary recursion when receiving a DTLS hello request can be used to
crash a DTLS client. Fixed by handling DTLS hello request without recursion.
Thanks to Imre Rad (Search-Lab Ltd.) for discovering this issue.
Patch borrowed from Fedora
Upstream-Status: Backport
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
diff --git a/ssl/d1_both.c b/ssl/d1_both.c
index 07f67f8..4c2fd03 100644
--- a/ssl/d1_both.c
+++ b/ssl/d1_both.c
@@ -793,6 +793,7 @@ dtls1_get_message_fragment(SSL *s, int st1, int stn, long max, int *ok)
int i,al;
struct hm_header_st msg_hdr;
+ redo:
/* see if we have the required fragment already */
if ((frag_len = dtls1_retrieve_buffered_fragment(s,max,ok)) || *ok)
{
@@ -851,8 +852,7 @@ dtls1_get_message_fragment(SSL *s, int st1, int stn, long max, int *ok)
s->msg_callback_arg);
s->init_num = 0;
- return dtls1_get_message_fragment(s, st1, stn,
- max, ok);
+ goto redo;
}
else /* Incorrectly formated Hello request */
{

1
meta/recipes-connectivity/openssl/openssl_1.0.1g.bb
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@@ -36,6 +36,7 @@ SRC_URI += "file://configure-targets.patch \
file://openssl-fix-des.pod-error.patch \
file://openssl-1.0.1e-cve-2014-0195.patch \
file://openssl-1.0.1e-cve-2014-0198.patch \
file://openssl-1.0.1e-cve-2014-0221.patch \
file://openssl-CVE-2010-5298.patch \
"