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Red Hat Enterprise Linux RHSA-2013:0588-01 Moderate: GnuTLS Timing Attack

red hat
Calendar Grey March 4, 2013
Scroller Redhat
Red Hat released an important security advisory for a GnuTLS update, addressing a timing issue in Enterprise Linux, highlighting the importance of patching for strong security
Updated gnutls packages that fix one security issue are now available for Red Hat Enterprise Linux 5 and 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).
It was discovered that GnuTLS leaked timing information when decrypting TLS/SSL protocol encrypted records when CBC-mode cipher suites were used. A remote attacker could possibly use this flaw to retrieve plain text from the encrypted packets by using a TLS/SSL server as a padding oracle. (CVE-2013-1619)
Users of GnuTLS are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. 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 update moderate threat timing attack GnuTLS

References

https://access.redhat.com/security/cve/CVE-2013-1619 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386: gnutls-1.4.1-10.el5_9.1.i386.rpm gnutls-debuginfo-1.4.1-10.el5_9.1.i386.rpm gnutls-utils-1.4.1-10.el5_9.1.i386.rpm
x86_64: gnutls-1.4.1-10.el5_9.1.i386.rpm gnutls-1.4.1-10.el5_9.1.x86_64.rpm gnutls-debuginfo-1.4.1-10.el5_9.1.i386.rpm gnutls-debuginfo-1.4.1-10.el5_9.1.x86_64.rpm gnutls-utils-1.4.1-10.el5_9.1.x86_64.rpm
RHEL Desktop Workstation (v. 5 client):
Source:
i386: gnutls-debuginfo-1.4.1-10.el5_9.1.i386.rpm gnutls-devel-1.4.1-10.el5_9.1.i386.rpm
x86_64: gnutls-debuginfo-1.4.1-10.el5_9.1.i386.rpm gnutls-debuginfo-1.4.1-10.el5_9.1.x86_64.rpm gnutls-devel-1.4.1-10.el5_9.1.i386.rpm gnutls-devel-1.4.1-10.el5_9.1.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386: gnutls-1.4.1-10.el5_9.1.i386.rpm gnutls-debuginfo-1.4.1-10.el5_9.1.i386.rpm gnutls-devel-1.4.1-10.el5_9.1.i386.rpm gnutls-utils-1.4.1-10.el5_9.1.i386.rpm
ia64: gnutls-1.4.1-10.el5_9.1.i386.rpm gnutls-1.4.1-10.el5_9.1.ia64.rpm gnutls-debuginfo-1.4.1-10.el5_9.1.i386.rpm gnutls-debuginfo-1.4.1-10.el5_9.1.ia64.rpm gnutls-devel-1.4.1-10.el5_9.1.ia64.rpm gnutls-utils-1.4.1-10.el5_9.1.ia64.rpm
ppc: gnutls-1.4.1-10.el5_9.1.ppc.rpm gnutls-1.4.1-10.el5_9.1.ppc64.rpm gnutls-debuginfo-1.4.1-10.el5_9.1.ppc.rpm

Read the Full Advisory


Advisory ID: RHSA-2013:0588-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2013:0588.html
Issue date: 2013-03-04

Topic

Updated gnutls packages that fix one security issue are now available forRed Hat Enterprise Linux 5 and 6.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory Red Hat update moderate threat timing attack GnuTLS

Relevant Releases Architectures

RHEL Desktop Workstation (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

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

908238 - CVE-2013-1619 gnutls: TLS CBC padding timing attack (lucky-13)

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