[17194] in Kerberos-V5-bugs
[krbdev.mit.edu #9266] git commit
daemon@ATHENA.MIT.EDU (Greg Hudson via RT)
Mon Nov 9 11:59:01 2026
From: "Greg Hudson via RT" <rt-comment@krbdev.mit.edu>
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Date: Mon, 09 Nov 2026 11:58:53 -0500
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Mon Nov 09 11:58:53 2026: Request 9266 was acted upon.
Transaction: Ticket created by ghudson@mit.edu
Queue: krb5
Subject: git commit
Owner: ghudson@mit.edu
Requestors:
Status: new
Ticket <URL: https://krbdev.mit.edu/rt/Ticket/Display.html?id=9266 >
Avoid repeated reallocation when decoding ASN.1
In decode_sequence_of(), make a first pass over the tags to count and
validate the elements, allowing the array to be allocated once instead
of reallocated for each element.
CVE-2026-119079:
In MIT krb5 release 1.11 and later, an unauthenticated attacker can
cause the KDC or an application server to consume a large amount of
CPU time decoding ASN.1 protocol elements by sending a long sequence.
https://github.com/krb5/krb5/commit/782e5ac4fb1496a79de0b87e1fc485f897e97d6d
Author: Greg Hudson <ghudson@mit.edu>
Commit: 782e5ac4fb1496a79de0b87e1fc485f897e97d6d
Branch: master
src/lib/krb5/asn.1/asn1_encode.c | 38 ++++++++++++++++++++------------------
1 file changed, 20 insertions(+), 18 deletions(-)
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