High 10.0Published Apr 8, 2009

CVE-2009-0846The 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 servic…

Updated under an hour ago (Nov 2, 2026, 12:20 AM ET)

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It affects mit kerberos_5 and 8 other products. Add what you run to find out whether that includes you.

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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.

CVSS: 10.0 HIGH (v2.0, NVD)AV:N/AC:L/Au:N/C:C/I:C/A:C
Weakness (CWE): CWE-824
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

mit kerberos_5 mit:kerberos_5	before 1.6.4	NVD
fedoraproject fedora fedoraproject:fedora	9; 10	NVD
canonical ubuntu_linux canonical:ubuntu_linux	6.06; 7.10; 8.04; 8.10	NVD
apple mac_os_x apple:mac_os_x	before 10.5.7	NVD
redhat enterprise_linux redhat:enterprise_linux	4.0	NVD
redhat enterprise_linux_desktop redhat:enterprise_linux_desktop	3.0; 4.0	NVD
redhat enterprise_linux_eus redhat:enterprise_linux_eus	4.7	NVD
redhat enterprise_linux_server redhat:enterprise_linux_server	2.0; 3.0; 4.0	NVD
redhat enterprise_linux_workstation redhat:enterprise_linux_workstation	2.0; 3.0; 4.0	NVD

References

References

http://lists.apple.com/archives/security-announce/2009/May/msg00002.html	mailing-list
http://lists.vmware.com/pipermail/security-announce/2009/000059.html	broken-link
http://marc.info/?l=bugtraq&m=124896429301168&w=2	third-party-advisory
http://marc.info/?l=bugtraq&m=130497213107107&w=2	third-party-advisory
http://rhn.redhat.com/errata/RHSA-2009-0409.html	third-party-advisory
http://rhn.redhat.com/errata/RHSA-2009-0410.html	third-party-advisory
http://secunia.com/advisories/34594	broken-link
http://secunia.com/advisories/34598	broken-link
http://secunia.com/advisories/34617	broken-link
http://secunia.com/advisories/34622	broken-link
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.