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openssl: fix CVE-2014-0195 

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

DTLS invalid fragment vulnerability (CVE-2014-0195)

A buffer overrun attack can be triggered by sending invalid DTLS fragments
to an OpenSSL DTLS client or server. This is potentially exploitable to
run arbitrary code on a vulnerable client or server.

Only applications using OpenSSL as a DTLS client or server affected.

(Patch borrowed from Fedora.)

(From OE-Core rev: c707b3ea9e1fbff2c6a82670e4b1af2b4f53d5e2)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Paul Eggleton 2014-06-09 16:53:43 +01:00 committed by Richard Purdie
parent ad2c79b0fd
commit c5d81c3386
2 changed files with 41 additions and 0 deletions
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40
meta/recipes-connectivity/openssl/openssl-1.0.1e/openssl-1.0.1e-cve-2014-0195.patch Normal file
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@ -0,0 +1,40 @@
commit 208d54db20d58c9a5e45e856a0650caadd7d9612
Author: Dr. Stephen Henson <steve@openssl.org>
Date: Tue May 13 18:48:31 2014 +0100
Fix for CVE-2014-0195
A buffer overrun attack can be triggered by sending invalid DTLS fragments
to an OpenSSL DTLS client or server. This is potentially exploitable to
run arbitrary code on a vulnerable client or server.
Fixed by adding consistency check for DTLS fragments.
Thanks to Jüri Aedla for reporting 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 2e8cf68..07f67f8 100644
--- a/ssl/d1_both.c
+++ b/ssl/d1_both.c
@@ -627,7 +627,16 @@ dtls1_reassemble_fragment(SSL *s, struct hm_header_st* msg_hdr, int *ok)
frag->msg_header.frag_off = 0;
}
else
+ {
frag = (hm_fragment*) item->data;
+ if (frag->msg_header.msg_len != msg_hdr->msg_len)
+ {
+ item = NULL;
+ frag = NULL;
+ goto err;
+ }
+ }
+
/* If message is already reassembled, this must be a
* retransmit and can be dropped.

1
meta/recipes-connectivity/openssl/openssl_1.0.1e.bb
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@ -39,6 +39,7 @@ SRC_URI += "file://configure-targets.patch \
file://0001-Use-version-in-SSL_METHOD-not-SSL-structure.patch \
file://CVE-2014-0160.patch \
file://openssl-CVE-2014-0198-fix.patch \
file://openssl-1.0.1e-cve-2014-0195.patch \
"
SRC_URI[md5sum] = "66bf6f10f060d561929de96f9dfe5b8c"