Overly broad permissions can turn one compromised account into a much larger security problem. Learn how to reduce unnecessary access, review privileges, and apply least privilege across modern Linux systems. Review Linux Privileges×

Alerts This Week
Warning Icon 1 521
Alerts This Week
Warning Icon 1 521

Red Hat Enterprise Linux 6 RHSA-2012:0429-01 Critical TLS Issue

red hat
Calendar Grey March 27, 2012
Scroller Redhat
Crucial patch released for OpenSSL tackling severe HTTPS management vulnerabilities on CentOS Linux.
Updated gnutls packages that fix two security issues are now available for Red Hat Enterprise Linux 6

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258

Summary

The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security (TLS).
A flaw was found in the way GnuTLS decrypted malformed TLS records. This could cause a TLS/SSL client or server to crash when processing a specially-crafted TLS record from a remote TLS/SSL connection peer. (CVE-2012-1573)
A boundary error was found in the gnutls_session_get_data() function. A malicious TLS/SSL server could use this flaw to crash a TLS/SSL client or, possibly, execute arbitrary code as the client, if the client passed a fixed-sized buffer to gnutls_session_get_data() before checking the real size of the session data provided by the server. (CVE-2011-4128)
Red Hat would like to thank Matthew Hall of Mu Dynamics for reporting CVE-2012-1573.
Users of GnuTLS are advised to upgrade to these updated packages, which contain backported patches to correct these issues. For the update to take effect, all applications linked to the GnuTLS library must be restarted, or the system rebooted.

Topics%20covered

Topics Covered

security advisory red hat critical update security impact gnutls tls issues

References

https://access.redhat.com/security/cve/CVE-2011-4128 https://access.redhat.com/security/cve/CVE-2012-1573 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source:
i386: gnutls-2.8.5-4.el6_2.2.i686.rpm gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm gnutls-utils-2.8.5-4.el6_2.2.i686.rpm
x86_64: gnutls-2.8.5-4.el6_2.2.i686.rpm gnutls-2.8.5-4.el6_2.2.x86_64.rpm gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm gnutls-debuginfo-2.8.5-4.el6_2.2.x86_64.rpm gnutls-utils-2.8.5-4.el6_2.2.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source:
i386: gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm gnutls-devel-2.8.5-4.el6_2.2.i686.rpm gnutls-guile-2.8.5-4.el6_2.2.i686.rpm
x86_64: gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm gnutls-debuginfo-2.8.5-4.el6_2.2.x86_64.rpm gnutls-devel-2.8.5-4.el6_2.2.i686.rpm gnutls-devel-2.8.5-4.el6_2.2.x86_64.rpm gnutls-guile-2.8.5-4.el6_2.2.i686.rpm gnutls-guile-2.8.5-4.el6_2.2.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
x86_64: gnutls-2.8.5-4.el6_2.2.i686.rpm gnutls-2.8.5-4.el6_2.2.x86_64.rpm gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm gnutls-debuginfo-2.8.5-4.el6_2.2.x86_64.rpm gnutls-utils-2.8.5-4.el6_2.2.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source:
x86_64: gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm gnutls-debuginfo-2.8.5-4.el6_2.2.x86_64.rpm gnutls-devel-2.8.5-4.el6_2.2.i686.rpm gnutls-devel-2.8.5-4.el6_2.2.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2012:0429-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2012:0429.html
Issue date: 2012-03-27

Topic

Updated gnutls packages that fix two security issues are now available forRed Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as havingimportant security impact. Common Vulnerability Scoring System (CVSS) basescores, which give detailed severity ratings, are available for eachvulnerability from the CVE links in the References section.

Topics%20covered

Topics Covered

security advisory red hat critical update security impact gnutls tls issues

Relevant Releases Architectures

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

Bugs Fixed

752308 - CVE-2011-4128 gnutls: buffer overflow in gnutls_session_get_data() (GNUTLS-SA-2011-2)

805432 - CVE-2012-1573 gnutls: TLS record handling issue (GNUTLS-SA-2012-2, MU-201202-01)

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.