Bug 696334 (CVE-2011-0285) - CVE-2011-0285 krb5: kadmind invalid pointer free() (MITKRB5-SA-004)
Summary: CVE-2011-0285 krb5: kadmind invalid pointer free() (MITKRB5-SA-004)
Alias: CVE-2011-0285
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 696341 696342 696343
TreeView+ depends on / blocked
Reported: 2011-04-13 20:39 UTC by Vincent Danen
Modified: 2021-02-24 16:09 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2013-03-15 03:59:22 UTC

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2011:0447 0 normal SHIPPED_LIVE Moderate: krb5 security update 2011-04-14 18:16:24 UTC

Description Vincent Danen 2011-04-13 20:39:51 UTC
A bug was discovered [1],[2] in the password-changing capability of the MIT krb5 administration daemon (kadmind) that can cause it to attempt to free() an invalid pointer under certain error conditions.  This could allow an unauthenticated remote attacker to cause the kadmind process to terminate, resulting in a denial of service.

Only krb5 1.7 and higher are vulnerable to this flaw; earlier releases to do not contain the functionality that the vulnerable code implements.

Upcoming krb5 releases will correct the flaw, but patches are available for 1.7.x/1.8.x [3] and 1.9.x [4].

[1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=621726
[2] http://web.mit.edu/Kerberos/advisories/MITKRB5-SA-2011-004.txt
[3] http://web.mit.edu/kerberos/advisories/2011-004-patch-r18.txt
[4] http://web.mit.edu/kerberos/advisories/2011-004-patch.txt

Comment 4 Vincent Danen 2011-04-13 21:02:43 UTC
Created krb5 tracking bugs for this issue

Affects: fedora-all [bug 696343]

Comment 6 Vincent Danen 2011-04-14 01:14:16 UTC
Glibc protections turn an invalid-free into a crash-only (no arbitrary code execution).

Comment 7 errata-xmlrpc 2011-04-14 18:16:34 UTC
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0447 https://rhn.redhat.com/errata/RHSA-2011-0447.html

Comment 8 Vincent Danen 2013-03-15 03:59:22 UTC

This issue did not affect the versions of krb5 as shipped with Red Hat Enterprise Linux 5.

Note You need to log in before you can comment on or make changes to this bug.