Bug 752308 (CVE-2011-4128) - CVE-2011-4128 gnutls: buffer overflow in gnutls_session_get_data() (GNUTLS-SA-2011-2)
Summary: CVE-2011-4128 gnutls: buffer overflow in gnutls_session_get_data() (GNUTLS-SA...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2011-4128
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 752703 805074 805075 805078 805079 805438 805439 841165 1063396
Blocks: 752310
TreeView+ depends on / blocked
 
Reported: 2011-11-09 06:27 UTC by Vincent Danen
Modified: 2021-02-24 13:45 UTC (History)
4 users (show)

Fixed In Version: gnutls 2.12.14, gnutls 3.0.7
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2014-03-14 07:49:45 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2012:0428 0 normal SHIPPED_LIVE Important: gnutls security update 2012-03-28 02:54:10 UTC
Red Hat Product Errata RHSA-2012:0429 0 normal SHIPPED_LIVE Important: gnutls security update 2012-03-28 02:53:57 UTC

Description Vincent Danen 2011-11-09 06:27:41 UTC 
A flaw was reported [1] in the GnuTLS gnutls_session_get_data() function, which could overflow a too-short buffer parameter allocated by the caller.  The test which was to avoid such buffer overflows was not working.  A malicious server could use this flaw in a vulnerable client to send a larger SessionTicket in the hope of overflowing the client.

Upstream has indicated that they are unaware of any client software that does not properly use the session resumption functions; clients that perform session resumption as documented [2] are not vulnerable.

[1] http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/5596
[2] http://www.gnu.org/s/gnutls/manual/html_node/Client-with-Resume-capability-example.html#Client-with-Resume-capability-example
Comment 1 Vincent Danen 2011-11-09 06:32:11 UTC 
Upstream git commits to correct the flaw:

http://git.savannah.gnu.org/gitweb/?p=gnutls.git;a=commitdiff;h=190cef6eed37d0e73a73c1e205eb31d45ab60a3c
http://git.savannah.gnu.org/gitweb/?p=gnutls.git;a=commitdiff;h=e82ef4545e9e98cbcb032f55d7c750b81e3a0450

This is corrected in upstream 2.12.14 and 3.0.7.
Comment 2 Vincent Danen 2011-11-09 17:07:10 UTC 
This has been assigned the name CVE-2011-4128.
Comment 7 Huzaifa S. Sidhpurwala 2011-11-10 07:21:33 UTC 
This issue affects the version of gnutls as shipped with Fedora 14, 15 and 16.
Comment 9 Huzaifa S. Sidhpurwala 2011-11-10 07:28:20 UTC 
Created gnutls tracking bugs for this issue

Affects: fedora-all [bug 752703]
Comment 14 errata-xmlrpc 2012-03-27 22:56:54 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2012:0429 https://rhn.redhat.com/errata/RHSA-2012-0429.html
Comment 15 errata-xmlrpc 2012-03-27 22:57:04 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2012:0428 https://rhn.redhat.com/errata/RHSA-2012-0428.html
Comment 16 Vincent Danen 2012-03-27 23:55:09 UTC 
Statement:

This issue does not affect the version of gnutls as shipped with Red Hat Enterprise Linux 4.
Comment 17 Fedora Update System 2012-04-11 03:49:38 UTC 
gnutls-2.10.5-3.fc15 has been pushed to the Fedora 15 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 18 Fedora Update System 2012-04-11 17:00:25 UTC 
gnutls-2.10.5-3.fc15 has been pushed to the Fedora 15 stable repository.  If problems still persist, please make note of it in this bug report.
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