[16659] in Kerberos-V5-bugs
[krbdev.mit.edu #8959] git commit
daemon@ATHENA.MIT.EDU (Greg Hudson via RT)
Tue Nov 3 15:57:23 2020
From: "Greg Hudson via RT" <rt-comment@krbdev.mit.edu>
In-Reply-To:
Message-ID: <rt-4.4.4-46892-1604437023-1591.8959-4-0@mit.edu>
To: "AdminCc of krbdev.mit.edu Ticket #8959":;
Date: Tue, 03 Nov 2020 15:57:03 -0500
MIME-Version: 1.0
Reply-To: rt-comment@krbdev.mit.edu
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Errors-To: krb5-bugs-bounces@mit.edu
Tue Nov 03 15:57:02 2020: Request 8959 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=8959 >
Add recursion limit for ASN.1 indefinite lengths
The libkrb5 ASN.1 decoder supports BER indefinite lengths. It
computes the tag length using recursion; the lack of a recursion limit
allows an attacker to overrun the stack and cause the process to
crash. Reported by Demi Obenour.
CVE-2020-28196:
In MIT krb5 releases 1.11 and later, an unauthenticated attacker can
cause a denial of service for any client or server to which it can
send an ASN.1-encoded Kerberos message of sufficient length.
https://github.com/krb5/krb5/commit/57415dda6cf04e73ffc3723be518eddfae599bfd
Author: Greg Hudson <ghudson@mit.edu>
Commit: 57415dda6cf04e73ffc3723be518eddfae599bfd
Branch: master
src/lib/krb5/asn.1/asn1_encode.c | 16 +++++++++-------
1 files changed, 9 insertions(+), 7 deletions(-)
_______________________________________________
krb5-bugs mailing list
krb5-bugs@mit.edu
https://mailman.mit.edu/mailman/listinfo/krb5-bugs
