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Red Hat: RHSA-2008:0489-01 Critical: GnuTLS Remote Crash Issue

red hat
Calendar Grey May 20, 2008
Dist Redhat Esm H88
Essential OpenSSL security patch for Fedora Linux addresses vulnerabilities that may lead to remote user crashes and potential exploits.
Updated gnutls packages that fix several security issues are now available for Red Hat Enterprise Linux 5

Solution

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

This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at

Summary

The GnuTLS Library provides support for cryptographic algorithms and protocols such as TLS. GnuTLS includes libtasn1, a library developed for ASN.1 structures management that includes DER encoding and decoding.
Flaws were found in the way GnuTLS handles malicious client connections. A malicious remote client could send a specially crafted request to a service using GnuTLS that could cause the service to crash. (CVE-2008-1948, CVE-2008-1949, CVE-2008-1950)
We believe it is possible to leverage the flaw CVE-2008-1948 to execute arbitrary code but have been unable to prove this at the time of releasing this advisory. Red Hat Enterprise Linux 5 includes applications, such as CUPS, that would be directly vulnerable to any such an exploit, however. Consequently, we have assigned it critical severity.
Users of GnuTLS are advised to upgrade to these updated packages, which contain a backported patch that corrects these issues.

Topics%20covered

Topics Covered

security advisory update critical Red Hat Enterprise Linux remote crash gnutls service issue

References

https://www.cve.org/CVERecord?id=CVE-2008-1948 https://www.cve.org/CVERecord?id=CVE-2008-1949 https://www.cve.org/CVERecord?id=CVE-2008-1950 https://access.redhat.com/security/updates/classification#critical

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386: gnutls-1.4.1-3.el5_1.i386.rpm gnutls-debuginfo-1.4.1-3.el5_1.i386.rpm gnutls-utils-1.4.1-3.el5_1.i386.rpm
x86_64: gnutls-1.4.1-3.el5_1.i386.rpm gnutls-1.4.1-3.el5_1.x86_64.rpm gnutls-debuginfo-1.4.1-3.el5_1.i386.rpm gnutls-debuginfo-1.4.1-3.el5_1.x86_64.rpm gnutls-utils-1.4.1-3.el5_1.x86_64.rpm
RHEL Desktop Workstation (v. 5 client):
Source:
i386: gnutls-debuginfo-1.4.1-3.el5_1.i386.rpm gnutls-devel-1.4.1-3.el5_1.i386.rpm
x86_64: gnutls-debuginfo-1.4.1-3.el5_1.i386.rpm gnutls-debuginfo-1.4.1-3.el5_1.x86_64.rpm gnutls-devel-1.4.1-3.el5_1.i386.rpm gnutls-devel-1.4.1-3.el5_1.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386: gnutls-1.4.1-3.el5_1.i386.rpm gnutls-debuginfo-1.4.1-3.el5_1.i386.rpm gnutls-devel-1.4.1-3.el5_1.i386.rpm gnutls-utils-1.4.1-3.el5_1.i386.rpm
ia64: gnutls-1.4.1-3.el5_1.i386.rpm gnutls-1.4.1-3.el5_1.ia64.rpm gnutls-debuginfo-1.4.1-3.el5_1.i386.rpm gnutls-debuginfo-1.4.1-3.el5_1.ia64.rpm gnutls-devel-1.4.1-3.el5_1.ia64.rpm gnutls-utils-1.4.1-3.el5_1.ia64.rpm
ppc: gnutls-1.4.1-3.el5_1.ppc.rpm gnutls-1.4.1-3.el5_1.ppc64.rpm gnutls-debuginfo-1.4.1-3.el5_1.ppc.rpm gnutls-debuginfo-1.4.1-3.el5_1.ppc64.rpm

Read the Full Advisory


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2008:0489-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2008:0489.html
Issue date: 2008-05-20

Topic

Updated gnutls packages that fix several security issues are now available for Red Hat Enterprise Linux 5.

This update has been rated as having critical security impact by the Red Hat Security Response Team.

Topics%20covered

Topics Covered

security advisory update critical Red Hat Enterprise Linux remote crash gnutls service issue

Relevant Releases Architectures

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

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

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

Bugs Fixed

447461 - CVE-2008-1948 GNUTLS-SA-2008-1-1 GnuTLS buffer overflow

447462 - CVE-2008-1949 GNUTLS-SA-2008-1-2 GnuTLS null-pointer dereference

447463 - CVE-2008-1950 GNUTLS-SA-2008-1-3 GnuTLS memory overread flaw

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