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
MIT Kerberos 5=5-1.6.3
MIT Kerberos 5
MIT Kerberos 5=1.0
MIT Kerberos 5=1.0.6
MIT Kerberos 5=1.1
MIT Kerberos 5=1.1.1
MIT Kerberos 5=1.2
MIT Kerberos 5=1.2-beta1
MIT Kerberos 5=1.2-beta2
MIT Kerberos 5=1.2.1
MIT Kerberos 5=1.2.2
MIT Kerberos 5=1.2.3
MIT Kerberos 5=1.2.4
MIT Kerberos 5=1.2.5
MIT Kerberos 5=1.2.6
MIT Kerberos 5=1.2.7
MIT Kerberos 5=1.2.8
MIT Kerberos 5=1.3
MIT Kerberos 5=1.3-alpha1
MIT Kerberos 5=1.3.1
MIT Kerberos 5=1.3.2
MIT Kerberos 5=1.3.3
MIT Kerberos 5=1.3.4
MIT Kerberos 5=1.3.5
MIT Kerberos 5=1.3.6
MIT Kerberos 5=1.4
MIT Kerberos 5=1.4.1
MIT Kerberos 5=1.4.2
MIT Kerberos 5=1.4.3
MIT Kerberos 5=1.4.4
MIT Kerberos 5=1.5
MIT Kerberos 5=1.5.1
MIT Kerberos 5=1.5.2
MIT Kerberos 5=1.5.3
MIT Kerberos 5=1.6
MIT Kerberos 5=1.6.1
MIT Kerberos 5=1.6.2
MIT Kerberos 5<1.6.4
Fedora=9
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
redhat enterprise Linux desktop=3.0
redhat enterprise Linux desktop=4.0
redhat enterprise Linux eus=4.7
redhat enterprise Linux server=2.0
redhat enterprise Linux server=3.0
redhat enterprise Linux server=4.0
redhat enterprise Linux workstation=2.0
redhat enterprise Linux workstation=3.0
redhat enterprise Linux workstation=4.0

Remedy

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

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

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.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203