Synopsis

Important: krb5 security update

Type/Severity

Security Advisory: Important

Topic

Updated krb5 packages that fix a security issue are now available for Red
Hat Enterprise Linux 4.

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

Description

Kerberos is a network authentication system which allows clients and
servers to authenticate to each other using symmetric encryption and a
trusted third party, the Key Distribution Center (KDC).

An input validation flaw was found in the ASN.1 (Abstract Syntax Notation
One) decoder used by MIT Kerberos. A remote attacker could use this flaw to
crash a network service using the MIT Kerberos library, such as kadmind or
krb5kdc, by causing it to dereference or free an uninitialized pointer.
(CVE-2009-0846)

All krb5 users should upgrade to these updated packages, which contain a
backported patch to correct this issue. All running services using the MIT
Kerberos libraries must be restarted for the update to take effect.

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
http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 4 x86_64
• Red Hat Enterprise Linux Server 4 ia64
• Red Hat Enterprise Linux Server 4 i386
• Red Hat Enterprise Linux Server - Extended Update Support 4.7 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support 4.7 ia64
• Red Hat Enterprise Linux Server - Extended Update Support 4.7 i386
• Red Hat Enterprise Linux Workstation 4 x86_64
• Red Hat Enterprise Linux Workstation 4 ia64
• Red Hat Enterprise Linux Workstation 4 i386
• Red Hat Enterprise Linux Desktop 4 x86_64
• Red Hat Enterprise Linux Desktop 4 i386
• Red Hat Enterprise Linux for IBM z Systems 4 s390x
• Red Hat Enterprise Linux for IBM z Systems 4 s390
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 4.7 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 4.7 s390
• Red Hat Enterprise Linux for Power, big endian 4 ppc
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 4.7 ppc

Fixes

• BZ - 491036 - CVE-2009-0846 krb5: ASN.1 decoder can free uninitialized pointer when decoding an invalid encoding (MITKRB5-SA-2009-002)

CVEs

• CVE-2009-0846

References

• http://www.redhat.com/security/updates/classification/#important
• http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-002.txt

Red Hat Enterprise Linux for IBM z Systems 4

SRPM
s390x
krb5-libs-1.3.4-60.el4_7.2.s390.rpm	SHA-256: dbebd2cd688c1e7f4b5c4f39eea55b53f130913824863371603021394c18fd7d
s390
krb5-devel-1.3.4-60.el4_7.2.s390.rpm	SHA-256: 886a6e1c16e230f56bdfa5176fed23a2c1f59959534c9caa2d3a7cd60f043905
krb5-libs-1.3.4-60.el4_7.2.s390.rpm	SHA-256: dbebd2cd688c1e7f4b5c4f39eea55b53f130913824863371603021394c18fd7d
krb5-server-1.3.4-60.el4_7.2.s390.rpm	SHA-256: 04faebfad963efd35539e14c492bd572918e720af9f1a90c1cd29ace283a0c2d
krb5-workstation-1.3.4-60.el4_7.2.s390.rpm	SHA-256: 8a356fc410d672a7a661941cc2834b54911ee4a0c633be2642ee5d1d3de31ec3

Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 4.7

SRPM
s390x
krb5-libs-1.3.4-60.el4_7.2.s390.rpm	SHA-256: dbebd2cd688c1e7f4b5c4f39eea55b53f130913824863371603021394c18fd7d
s390
krb5-devel-1.3.4-60.el4_7.2.s390.rpm	SHA-256: 886a6e1c16e230f56bdfa5176fed23a2c1f59959534c9caa2d3a7cd60f043905
krb5-libs-1.3.4-60.el4_7.2.s390.rpm	SHA-256: dbebd2cd688c1e7f4b5c4f39eea55b53f130913824863371603021394c18fd7d
krb5-server-1.3.4-60.el4_7.2.s390.rpm	SHA-256: 04faebfad963efd35539e14c492bd572918e720af9f1a90c1cd29ace283a0c2d
krb5-workstation-1.3.4-60.el4_7.2.s390.rpm	SHA-256: 8a356fc410d672a7a661941cc2834b54911ee4a0c633be2642ee5d1d3de31ec3