Bug 752308 - (CVE-2011-4128) CVE-2011-4128 gnutls: buffer overflow in gnutls_session_get_data() (GNUTLS-SA-2011-2)
CVE-2011-4128 gnutls: buffer overflow in gnutls_session_get_data() (GNUTLS-SA...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20111107,reported=2...
: Security
Depends On: 752703 805074 805075 805078 805079 805438 805439 841165 1063396
Blocks: 752310
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Reported: 2011-11-09 01:27 EST by Vincent Danen
Modified: 2014-10-20 07:05 EDT (History)
4 users (show)

See Also:
Fixed In Version: gnutls 2.12.14, gnutls 3.0.7
Doc Type: Bug Fix
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Last Closed: 2014-03-14 03:49:45 EDT
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Description Vincent Danen 2011-11-09 01:27:41 EST
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 2 Vincent Danen 2011-11-09 12:07:10 EST
This has been assigned the name CVE-2011-4128.
Comment 7 Huzaifa S. Sidhpurwala 2011-11-10 02:21:33 EST
This issue affects the version of gnutls as shipped with Fedora 14, 15 and 16.
Comment 9 Huzaifa S. Sidhpurwala 2011-11-10 02:28:20 EST
Created gnutls tracking bugs for this issue

Affects: fedora-all [bug 752703]
Comment 14 errata-xmlrpc 2012-03-27 18:56:54 EDT
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 18:57:04 EDT
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 19:55:09 EDT
Statement:

This issue does not affect the version of gnutls as shipped with Red Hat Enterprise Linux 4.
Comment 17 Fedora Update System 2012-04-10 23:49:38 EDT
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 13:00:25 EDT
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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