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Red Hat: RHSA-2009:0409-01 Important: KRB5 Remote Attack

red hat
Calendar Grey April 7, 2009
Dist Redhat Esm H88
Ubuntu releases critical OpenSSL patch tackling severe vulnerability to enhance system security protocols.
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 S...

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

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.

Topics%20covered

Topics Covered

security advisory remote attack Red Hat Enterprise Linux important impact input validation krb5 network authentication

References

https://www.cve.org/CVERecord?id=CVE-2009-0846 https://access.redhat.com/security/updates/classification#important http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-002.txt

Package List

Red Hat Enterprise Linux AS version 4:
Source:
i386: krb5-debuginfo-1.3.4-60.el4_7.2.i386.rpm krb5-devel-1.3.4-60.el4_7.2.i386.rpm krb5-libs-1.3.4-60.el4_7.2.i386.rpm krb5-server-1.3.4-60.el4_7.2.i386.rpm krb5-workstation-1.3.4-60.el4_7.2.i386.rpm
ia64: krb5-debuginfo-1.3.4-60.el4_7.2.i386.rpm krb5-debuginfo-1.3.4-60.el4_7.2.ia64.rpm krb5-devel-1.3.4-60.el4_7.2.ia64.rpm krb5-libs-1.3.4-60.el4_7.2.i386.rpm krb5-libs-1.3.4-60.el4_7.2.ia64.rpm krb5-server-1.3.4-60.el4_7.2.ia64.rpm krb5-workstation-1.3.4-60.el4_7.2.ia64.rpm
ppc: krb5-debuginfo-1.3.4-60.el4_7.2.ppc.rpm krb5-debuginfo-1.3.4-60.el4_7.2.ppc64.rpm krb5-devel-1.3.4-60.el4_7.2.ppc.rpm krb5-libs-1.3.4-60.el4_7.2.ppc.rpm krb5-libs-1.3.4-60.el4_7.2.ppc64.rpm krb5-server-1.3.4-60.el4_7.2.ppc.rpm krb5-workstation-1.3.4-60.el4_7.2.ppc.rpm
s390: krb5-debuginfo-1.3.4-60.el4_7.2.s390.rpm krb5-devel-1.3.4-60.el4_7.2.s390.rpm krb5-libs-1.3.4-60.el4_7.2.s390.rpm krb5-server-1.3.4-60.el4_7.2.s390.rpm krb5-workstation-1.3.4-60.el4_7.2.s390.rpm
s390x: krb5-debuginfo-1.3.4-60.el4_7.2.s390.rpm krb5-debuginfo-1.3.4-60.el4_7.2.s390x.rpm krb5-devel-1.3.4-60.el4_7.2.s390x.rpm krb5-libs-1.3.4-60.el4_7.2.s390.rpm krb5-libs-1.3.4-60.el4_7.2.s390x.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2009:0409-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2009:0409.html
Issue date: 2009-04-07

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.

Topics%20covered

Topics Covered

security advisory remote attack Red Hat Enterprise Linux important impact input validation krb5 network authentication

Relevant Releases Architectures

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64

Red Hat Enterprise Linux Desktop version 4 - i386, x86_64

Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64

Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

Bugs Fixed

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

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