Bug 491033 (CVE-2009-0844) - CVE-2009-0844 krb5: buffer over-read in SPNEGO GSS-API mechanism (MITKRB5-SA-2009-001)
Summary: CVE-2009-0844 krb5: buffer over-read in SPNEGO GSS-API mechanism (MITKRB5-SA-...
Alias: CVE-2009-0844
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL: http://web.nvd.nist.gov/view/vuln/det...
Whiteboard: impact=important,source=upstream,repo...
Keywords: Security
Depends On: 490635 490636
TreeView+ depends on / blocked
Reported: 2009-03-19 02:02 UTC by Vincent Danen
Modified: 2019-06-08 12:43 UTC (History)
3 users (show)

Clone Of:
Last Closed: 2009-04-09 09:35:10 UTC

Attachments (Terms of Use)
patch to fix MITKRB5-SA-2009-001 issues (CVE-2009-{0844,0845,0847} (2.20 KB, patch)
2009-03-19 02:09 UTC, Vincent Danen
no flags Details | Diff
Updated upstream patch (6.50 KB, patch)
2009-04-03 08:15 UTC, Tomas Hoger
no flags Details | Diff

External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2009:0408 normal SHIPPED_LIVE Important: krb5 security update 2009-04-07 18:47:39 UTC

Description Vincent Danen 2009-03-19 02:02:52 UTC
The MIT krb5 implementation of the SPNEGO GSS-API mechanism can read
beyond the end of a network input buffer.  This can cause a GSS-API
application to crash by reading from invalid address space.  Under
theoretically possible but very unlikely conditions, a small
information leak may occur.  We believe that no successful exploit
exists that could induce an information leak.

Comment 2 Vincent Danen 2009-03-19 02:06:19 UTC
The affected code is not in versions older than krb5 1.5, so only RHEL5 is affected (krb5 1.3.4 is in RHEL4).

Comment 3 Vincent Danen 2009-03-19 02:09:06 UTC
Created attachment 335792 [details]
patch to fix MITKRB5-SA-2009-001 issues (CVE-2009-{0844,0845,0847}

This patch corrects CVE-2009-0844, CVE-2009-0845, and CVE-2009-0846.  Provided by upstream.

Comment 4 Vincent Danen 2009-03-19 02:13:27 UTC
CVE-2009-0845 was previously disclosed, see bug #490634.

Comment 7 Tomas Hoger 2009-04-03 08:15:44 UTC
Created attachment 337997 [details]
Updated upstream patch

Upstream has updated patch for CVE-2009-0844 and CVE-2009-0845, fixing limited buffer over-read possible with previous patch.  Few extra checks were added, and patch for CVE-2009-0845 was changed to provide an error token.

Comment 8 Tomas Hoger 2009-04-07 18:20:52 UTC
Public now via:

Comment 9 errata-xmlrpc 2009-04-07 18:47:47 UTC
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2009:0408 https://rhn.redhat.com/errata/RHSA-2009-0408.html

Comment 10 Fedora Update System 2009-04-07 23:23:06 UTC
krb5-1.6.3-16.fc9 has been pushed to the Fedora 9 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 11 Fedora Update System 2009-04-07 23:23:26 UTC
krb5-1.6.3-18.fc10 has been pushed to the Fedora 10 stable repository.  If problems still persist, please make note of it in this bug report.

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