CVE-2021-37750 in krb5: NULL dereference in authenticated FAST TGS request

Related Vulnerabilities: CVE-2021-37750  

Debian Bug report logs - #992607
CVE-2021-37750 in krb5: NULL dereference in authenticated FAST TGS request

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Package: krb5-kdc; Maintainer for krb5-kdc is Sam Hartman <hartmans@debian.org>; Source for krb5-kdc is src:krb5 (PTS, buildd, popcon).

Reported by: Benjamin Kaduk <kaduk@mit.edu>

Date: Sat, 21 Aug 2021 02:54:01 UTC

Severity: normal

Tags: fixed-upstream, security, upstream

Found in versions krb5/1.17-3+deb10u2, krb5/1.15-1, krb5/1.17-3+deb10u1, krb5/1.18.3-6

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Report forwarded to debian-bugs-dist@lists.debian.org, Sam Hartman <hartmans@debian.org>:
Bug#992607; Package krb5-kdc. (Sat, 21 Aug 2021 02:54:03 GMT) (full text, mbox, link).


Acknowledgement sent to Benjamin Kaduk <kaduk@mit.edu>:
New Bug report received and forwarded. Copy sent to Sam Hartman <hartmans@debian.org>. (Sat, 21 Aug 2021 02:54:03 GMT) (full text, mbox, link).


Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Benjamin Kaduk <kaduk@mit.edu>
To: submit@bugs.debian.org
Cc: hartmans@mit.edu
Subject: CVE-2021-37750 in krb5: NULL dereference in authenticated FAST TGS request
Date: Fri, 20 Aug 2021 19:51:18 -0700
Package: krb5-kdc
Version: 1.15-1
Tags: security fixed-upstream

quoting from
https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49

CVE-2021-37750:

In MIT krb5 releases 1.14 and later, an authenticated attacker can
cause a null dereference in the KDC by sending a FAST TGS request with
no server field.




Added tag(s) upstream. Request was from Salvatore Bonaccorso <carnil@debian.org> to control@bugs.debian.org. (Sat, 21 Aug 2021 07:24:02 GMT) (full text, mbox, link).


Marked as found in versions krb5/1.18.3-6. Request was from Salvatore Bonaccorso <carnil@debian.org> to control@bugs.debian.org. (Sat, 21 Aug 2021 07:48:03 GMT) (full text, mbox, link).


Marked as found in versions krb5/1.17-3+deb10u2. Request was from Salvatore Bonaccorso <carnil@debian.org> to control@bugs.debian.org. (Sat, 21 Aug 2021 07:48:03 GMT) (full text, mbox, link).


Marked as found in versions krb5/1.17-3+deb10u1. Request was from Salvatore Bonaccorso <carnil@debian.org> to control@bugs.debian.org. (Sat, 21 Aug 2021 07:48:04 GMT) (full text, mbox, link).


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