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Subject: SVN Commit

PKINIT (draft9) null ptr deref [CVE-2012-1016]

Don't check for an agility KDF identifier in the non-draft9 reply
structure when we're building a draft9 reply, because it'll be NULL.

The KDC plugin for PKINIT can dereference a null pointer when handling
a draft9 request, leading to a crash of the KDC process. An attacker
would need to have a valid PKINIT certificate, or an unauthenticated
attacker could execute the attack if anonymous PKINIT is enabled.

CVSSv2 vector: AV:N/AC:M/Au:N/C:N/I:N/A:P/E:P/RL:O/RC:C

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(back ported from commit cd5ff932c9d1439c961b0cf9ccff979356686aff)
Author: Nalin Dahyabhai <>
Committer: Tom Yu <>
Commit: db64ca25d661a47b996b4e2645998b5d7f0eb52c
Branch: krb5-1.10
src/plugins/preauth/pkinit/pkinit_srv.c | 7 ++++---
1 files changed, 4 insertions(+), 3 deletions(-)