Bug 389097 – <net-misc/openswan-2.6.37 Cryptographic Helper Use-After-Free DoS (CVE-2011-4073)

• Status: RESOLVED FIXED
• Product: Gentoo Security

[Description Agostino Sarubbo 2011-10-31 13:53:11 UTC]

From secunia security advisory at $URL:

Description:
The vulnerability is caused due to a use-after-free error related to the crypto helper handler, which can be exploited to crash the IKE daemon by passing specially crafted ISAKMP phase 1 authentication.

The vulnerability is reported in versions 2.3.0 through 2.6.36 (configured with nhelpers=0).

Solution:
Update to version 2.6.37 or apply patch.

[Comment 1 Agostino Sarubbo 2011-10-31 13:55:50 UTC]

Atm I set to B3 because I don't know if nhelpers=0 is a default or not configuration.

Anyway there is no big difference from B3 ad C3

[Comment 2 Alin Năstac (RETIRED) 2011-11-08 20:26:51 UTC]

net-misc/openswan-2.6.37 has been submitted to the tree

[Comment 3 Agostino Sarubbo 2011-11-08 20:34:30 UTC]

Thanks.

Arches please test and mark stable:

=net-misc/openswan-2.6.37
target KEYWORDS : "amd64 x86"

[Comment 4 Agostino Sarubbo 2011-11-08 20:53:40 UTC]

@mrness, is enough compile test or is required other?

[Comment 5 Alin Năstac (RETIRED) 2011-11-08 23:01:41 UTC]

I've test it myself in a L2TP setup, a simple compile test should be enough.

[Comment 6 Paweł Hajdan, Jr. (RETIRED) 2011-11-09 13:52:18 UTC]

x86 stable

[Comment 7 Agostino Sarubbo 2011-11-09 17:25:08 UTC]

amd64 ok

[Comment 8 Ian Delaney (RETIRED) 2011-11-10 11:14:53 UTC]

amd64:

just a minor QA issue;

* QA Notice: Package has poor programming practices which may compile
 *            fine but exhibit random runtime failures.
 * ikeping.c:257:9: warning: dereferencing type-punned pointer will break strict-aliasing rules
 * ikeping.c:259:9: warning: dereferencing type-punned pointer will break strict-aliasing rules

 * Please do not file a Gentoo bug and instead report the above QA
 * issues directly to the upstream developers of this software.

otherwise all aok

[Comment 9 Tony Vroon (RETIRED) 2011-11-10 14:32:11 UTC]

+  10 Nov 2011; Tony Vroon <[e-mail]> openswan-2.6.37.ebuild:
+  Marked stable on AMD64 based on arch testing by Agostino "ago" Sarubbo & Ian
+  "idella4" Delaney in security bug #389097.

[Comment 10 Agostino Sarubbo 2011-11-10 16:05:40 UTC]

Thanks, added glsa request vote

[Comment 11 Tim Sammut (RETIRED) 2011-11-10 19:24:26 UTC]

Thanks, folks. GLSA Vote: yes.

[Comment 12 GLSAMaker/CVETool Bot 2011-11-18 06:17:46 UTC]

CVE-2011-4073 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-4073):
  Use-after-free vulnerability in the cryptographic helper handler
  functionality in Openswan 2.3.0 through 2.6.36 allows remote attackers to
  cause a denial of service (pluto IKE daemon crash) via vectors related to
  the (1) quick_outI1_continue and (2) quick_outI1 functions.

[Comment 13 Sean Amoss (RETIRED) 2012-03-06 21:12:59 UTC]

Vote: Yes.

Created new GLSA request.

[Comment 14 GLSAMaker/CVETool Bot 2012-03-16 11:15:27 UTC]

This issue was resolved and addressed in
 GLSA 201203-13 at http://security.gentoo.org/glsa/glsa-201203-13.xml
by GLSA coordinator Sean Amoss (ackle).