Bug 859002 - (CVE-2012-4436) CVE-2012-4436 fwknop (client): Buffer overflow by --last command line argument by processing of a specially-crafted ~/.fwknop.run
CVE-2012-4436 fwknop (client): Buffer overflow by --last command line argumen...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20120904,repor...
: Security
Depends On: 859006 859007
Blocks:
  Show dependency treegraph
 
Reported: 2012-09-20 06:50 EDT by Jan Lieskovsky
Modified: 2012-09-20 07:01 EDT (History)
2 users (show)

See Also:
Fixed In Version: fwknop 2.0.3
Doc Type: Bug Fix
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Description Jan Lieskovsky 2012-09-20 06:50:24 EDT
A buffer overflow flaw, potentially leading to out-of heap-based buffer bounds write, has been corrected in upstream 2.0.3 version of fwknop (from upstream Changelog at [1]):
4) [client] Fernando Arnaboldi from IOActive found a local buffer overflow in --last processing with a maliciously constructed ~/.fwknop.run file. This has been fixed with proper validation of .fwknop.run arguments.

References:
[1] http://www.cipherdyne.org/blog/categories/software-releases.html
[2] http://secunia.com/advisories/50522/
[3] http://www.openwall.com/lists/oss-security/2012/09/20/4

Relevant upstream patch:
[4] http://www.cipherdyne.org/cgi-bin/gitweb.cgi?p=fwknop.git;a=commitdiff;h=a60f05ad44e824f6230b22f8976399340cb535dc
Comment 1 Jan Lieskovsky 2012-09-20 06:55:01 EDT
This issue affects the versions of the fwknop package, as shipped with Rawhide and Fedora release of 17. Please schedule an update.

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This issue did NOT affect the version of the fwknop package, as shipped with Fedora release of 16 (as it is Perl language based implementation yet).
Comment 2 Jan Lieskovsky 2012-09-20 06:57:51 EDT
Created fwknop tracking bugs for this issue

Affects: fedora-rawhide [bug 859006]
Affects: fedora-17 [bug 859007]

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