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Bug 243156 (CVE-2008-4554) - Kernel: do_splice_from() arbitrary changes with O_APPEND (CVE-2008-4554)
Summary: Kernel: do_splice_from() arbitrary changes with O_APPEND (CVE-2008-4554)
Status: RESOLVED FIXED
Alias: CVE-2008-4554
Product: Gentoo Security
Classification: Unclassified
Component: Kernel (show other bugs)
Hardware: All Linux
: High normal (vote)
Assignee: Gentoo Security
URL: http://git.kernel.org/?p=linux/kernel...
Whiteboard: [linux <2.6.25.19] [linux >=2.6.26 <2...
Keywords:
Depends on:
Blocks:
 
Reported: 2008-10-21 22:42 UTC by Stefan Behte (RETIRED)
Modified: 2013-09-05 03:49 UTC (History)
1 user (show)

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Runtime testing required: ---

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Description Stefan Behte (RETIRED) gentoo-dev Security 2008-10-21 22:42:42 UTC 
CVE-2008-4554 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-4554):
  The do_splice_from function in fs/splice.c in the Linux kernel before
  2.6.27 does not reject file descriptors that have the O_APPEND flag
  set, which allows local users to bypass append mode and make
  arbitrary changes to other locations in the file.
Comment 1 Stefan Behte (RETIRED) gentoo-dev Security 2008-10-21 22:43:59 UTC 
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27
Comment 2 kfm 2009-07-20 23:55:58 UTC 
hardened-kernel unaffected at present time. Removing alias.

PS: genpatches-2.6.26-4 added 2.6.26.7. =genpatches-2.6.25* remains vulnerable. However, hardened-sources-2.6.25-r13 does not because we independently folded in the newer stable patches.