critical
10
CWE
20 824
Advisory Published
Updated

CVE-2009-0846: Input Validation

First published: Thu Apr 09 2009(Updated: )

The asn1_decode_generaltime function in lib/krb5/asn.1/asn1_decode.c in the ASN.1 GeneralizedTime decoder in MIT Kerberos 5 (aka krb5) before 1.6.4 allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via vectors involving an invalid DER encoding that triggers a free of an uninitialized pointer.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Kerberos=5-1.6.3
Kerberos
Kerberos=1.1
Kerberos=1.2
Kerberos=1.2.1
Kerberos=1.2.2
Kerberos=1.2.3
Kerberos=1.2.4
Kerberos=1.2.5
Kerberos=1.2.6
Kerberos=1.2.7
Kerberos=1.2.8
Kerberos=1.3-alpha1
Kerberos=1.3
Kerberos=1.3.1
Kerberos=1.3.2
Kerberos=1.3.3
Kerberos=1.3.4
Kerberos=1.3.5
Kerberos=1.3.6
Kerberos=1.4
Kerberos=1.4.1
Kerberos=1.4.2
Kerberos=1.4.3
Kerberos=1.4.4
Kerberos=1.5
Kerberos=1.5.1
Kerberos=1.5.2
Kerberos=1.5.3
Kerberos=1.6
Kerberos=1.6.1
Kerberos=1.6.2
Kerberos=1.0
Kerberos=1.0.6
Kerberos=1.1.1
Kerberos=1.2-beta1
Kerberos=1.2-beta2
Kerberos<1.6.4
Red Hat Fedora=9
Red Hat Fedora=10
Ubuntu=6.06
Ubuntu=7.10
Ubuntu=8.04
Ubuntu=8.10
Apple iOS and macOS<10.5.7
Red Hat Enterprise Linux=4.0
Red Hat Enterprise Linux Desktop=3.0
Red Hat Enterprise Linux Desktop=4.0
Red Hat Enterprise Linux Server EUS=4.7
Red Hat Enterprise Linux Server=2.0
Red Hat Enterprise Linux Server=3.0
Red Hat Enterprise Linux Server=4.0
Red Hat Enterprise Linux Workstation=2.0
Red Hat Enterprise Linux Workstation=3.0
Red Hat Enterprise Linux Workstation=4.0

Remedy

http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-002.txt

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2009-0846?

    CVE-2009-0846 has been classified with a critical severity level due to its potential to cause a denial of service or allow arbitrary code execution.

  • How do I fix CVE-2009-0846?

    To resolve CVE-2009-0846, upgrade your MIT Kerberos installation to version 1.6.4 or later, which addresses this vulnerability.

  • What are the affected versions for CVE-2009-0846?

    CVE-2009-0846 affects MIT Kerberos versions before 1.6.4, including various earlier versions such as 5-1.6.3, 1.5.3, and others.

  • What are the potential impacts of CVE-2009-0846?

    The potential impacts of CVE-2009-0846 include daemon crashes and possible execution of arbitrary code by remote attackers.

  • Which systems are primarily affected by CVE-2009-0846?

    CVE-2009-0846 primarily affects systems running MIT Kerberos 5, particularly those on platforms like Fedora, Ubuntu, and Red Hat.

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