Vulnerability Monitor

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CVE-2009-0846

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.

Security Impact Summary

CVE-2009-0846 is a security vulnerability that . Impacting 9 products from mit, from fedoraproject, from canonical and 6 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 2009, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

2009-04-09T00:30:00.267

Last Modified

2026-06-16T23:05:56.677

Status

Modified

Source

[email protected]

Severity

CVSSv2: 10.0 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: COMPLETE
  • Integrity Impact: COMPLETE
  • Availability Impact: COMPLETE
Exploitability Score

10.0

Impact Score

10.0

Weaknesses
  • Type: Primary
    CWE-824
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application mit kerberos_5 < 1.6.4 Yes
Operating System fedoraproject fedora 9 Yes
Operating System fedoraproject fedora 10 Yes
Operating System canonical ubuntu_linux 6.06 Yes
Operating System canonical ubuntu_linux 7.10 Yes
Operating System canonical ubuntu_linux 8.04 Yes
Operating System canonical ubuntu_linux 8.10 Yes
Operating System apple mac_os_x < 10.5.7 Yes
Operating System redhat enterprise_linux 4.0 Yes
Operating System redhat enterprise_linux_desktop 3.0 Yes
Operating System redhat enterprise_linux_desktop 4.0 Yes
Operating System redhat enterprise_linux_eus 4.7 Yes
Operating System redhat enterprise_linux_server 2.0 Yes
Operating System redhat enterprise_linux_server 3.0 Yes
Operating System redhat enterprise_linux_server 4.0 Yes
Operating System redhat enterprise_linux_workstation 2.0 Yes
Operating System redhat enterprise_linux_workstation 3.0 Yes
Operating System redhat enterprise_linux_workstation 4.0 Yes
References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For mit's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.