Bug 491033 - (CVE-2009-0844) CVE-2009-0844 krb5: buffer over-read in SPNEGO GSS-API mechanism (MITKRB5-SA-2009-001)
CVE-2009-0844 krb5: buffer over-read in SPNEGO GSS-API mechanism (MITKRB5-SA-...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
high Severity high
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Assigned To: Red Hat Product Security
http://web.nvd.nist.gov/view/vuln/det...
impact=important,source=upstream,repo...
: Security
Depends On: 490635 490636
Blocks:
  Show dependency treegraph
 
Reported: 2009-03-18 22:02 EDT by Vincent Danen
Modified: 2016-01-22 12:07 EST (History)
3 users (show)

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Doc Type: Bug Fix
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Last Closed: 2009-04-09 05:35:10 EDT
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
patch to fix MITKRB5-SA-2009-001 issues (CVE-2009-{0844,0845,0847} (2.20 KB, patch)
2009-03-18 22:09 EDT, Vincent Danen
no flags Details | Diff
Updated upstream patch (6.50 KB, patch)
2009-04-03 04:15 EDT, Tomas Hoger
no flags Details | Diff

  None (edit)
Description Vincent Danen 2009-03-18 22:02:52 EDT
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 2009-03-18 22:06:19 EDT
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 2009-03-18 22:09:06 EDT
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 2009-03-18 22:13:27 EDT
CVE-2009-0845 was previously disclosed, see bug #490634.
Comment 7 Tomas Hoger 2009-04-03 04:15:44 EDT
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 14:20:52 EDT
Public now via:
  http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-001.txt
Comment 9 errata-xmlrpc 2009-04-07 14:47:47 EDT
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 19:23:06 EDT
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 19:23:26 EDT
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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