CVE-2012-1016

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2013-03-05 · updated 2026-06-16
Weakness: CWE-476

Description

The pkinit_server_return_padata function in plugins/preauth/pkinit/pkinit_srv.c in the PKINIT implementation in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.4 attempts to find an agility KDF identifier in inappropriate circumstances, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted Draft 9 request.

Affected products

MIT Kerberos 5: before 1.10.4 — fixed in 1.10.4

How to fix

Upgrade to a fixed version: MIT Kerberos 5 1.10.4. Check the vendor advisory for mitigations.

References

http://krbdev.mit.edu/rt/Ticket/Display.html?id=7527
http://secunia.com/advisories/55040
http://web.mit.edu/kerberos/www/krb5-1.10/
https://github.com/krb5/krb5/commit/db64ca25d661a47b996b4e2645998b5d7f0eb52c
http://krbdev.mit.edu/rt/Ticket/Display.html?id=7527
http://secunia.com/advisories/55040
http://web.mit.edu/kerberos/www/krb5-1.10/
https://github.com/krb5/krb5/commit/db64ca25d661a47b996b4e2645998b5d7f0eb52c

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