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Ubuntu Security Notice USN-1418-1

Ubuntu Security Notice USN-1418-1
Posted Apr 6, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1418-1 - Alban Crequy discovered that the GnuTLS library incorrectly checked array bounds when copying TLS session data. A remote attacker could crash a client application, leading to a denial of service, as the client application prepared for TLS session resumption. Matthew Hall discovered that the GnuTLS library incorrectly handled TLS records. A remote attacker could crash client and server applications, leading to a denial of service, by sending a crafted TLS record. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2011-4128, CVE-2012-1573, CVE-2011-4128, CVE-2012-1573
MD5 | 1b4345011546b31df45e939a80cba711

Ubuntu Security Notice USN-1418-1

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Content-Disposition: inline

==========================================================================Ubuntu Security Notice USN-1418-1
April 05, 2012

gnutls13, gnutls26 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS

Summary:

The GnuTLS library could be made to crash under certain conditions.

Software Description:
- gnutls26: the GNU TLS library - commandline utilities
- gnutls13: the GNU TLS library - commandline utilities

Details:

Alban Crequy discovered that the GnuTLS library incorrectly checked array
bounds when copying TLS session data. A remote attacker could crash a client
application, leading to a denial of service, as the client application prepared
for TLS session resumption. (CVE-2011-4128)

Matthew Hall discovered that the GnuTLS library incorrectly handled TLS
records. A remote attacker could crash client and server applications, leading
to a denial of service, by sending a crafted TLS record. (CVE-2012-1573)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 11.10:
libgnutls26 2.10.5-1ubuntu3.1

Ubuntu 11.04:
libgnutls26 2.8.6-1ubuntu2.1

Ubuntu 10.10:
libgnutls26 2.8.6-1ubuntu0.1

Ubuntu 10.04 LTS:
libgnutls26 2.8.5-2ubuntu0.1

Ubuntu 8.04 LTS:
libgnutls13 2.0.4-1ubuntu2.7

In general, a standard system update will make all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-1418-1
CVE-2011-4128, CVE-2012-1573

Package Information:
https://launchpad.net/ubuntu/+source/gnutls26/2.10.5-1ubuntu3.1
https://launchpad.net/ubuntu/+source/gnutls26/2.8.6-1ubuntu2.1
https://launchpad.net/ubuntu/+source/gnutls26/2.8.6-1ubuntu0.1
https://launchpad.net/ubuntu/+source/gnutls26/2.8.5-2ubuntu0.1
https://launchpad.net/ubuntu/+source/gnutls13/2.0.4-1ubuntu2.7
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