Bug 794763 - glibc: F_S format string protection bypass via "nargs" integer overflow
Summary: glibc: F_S format string protection bypass via "nargs" integer overflow
Keywords:
Status: CLOSED DUPLICATE of bug 794766
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-02-17 15:08 UTC by Stefan Cornelius
Modified: 2019-09-29 12:50 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2012-02-17 15:48:02 UTC
Embargoed:

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Description Stefan Cornelius 2012-02-17 15:08:05 UTC 
In the Phrack article "A Eulogy for Format Strings", a researcher using nickname "Captain Planet" reported an integer overflow flaw in the format string protection mechanism offered by FORTIFY_SOURCE. A remote attacker could provide a specially crafted executable, leading to FORTIFY_SOURCE format string protection mechanism bypass, when executed.

References:
http://www.phrack.org/issues.html?issue=67&id=9#article

Upstream bug and Kees Cook's proposed patches:
  http://sourceware.org/bugzilla/show_bug.cgi?id=13656
  http://sourceware.org/ml/libc-alpha/2012-02/msg00023.html
  http://sourceware.org/ml/libc-alpha/2012-02/msg00012.html
  http://sourceware.org/ml/libc-alpha/2012-02/msg00073.html
Comment 1 Stefan Cornelius 2012-02-17 15:48:02 UTC 

*** This bug has been marked as a duplicate of bug 794766 ***
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