Bug 306891 (CVE-2006-5753) - CVE-2006-5753 kernel listxattr syscall can corrupt user space programs
Summary: CVE-2006-5753 kernel listxattr syscall can corrupt user space programs
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2006-5753
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: 220119 220677 247600
Blocks:
TreeView+ depends on / blocked
 
Reported: 2007-09-26 13:14 UTC by Mark J. Cox
Modified: 2021-11-12 19:35 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2010-03-20 02:45:36 UTC
Embargoed:

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Description Mark J. Cox 2007-09-26 13:14:44 UTC 
The listxattr syscall can corrupt user space under certain circumstances. The
problem seems to be related to signed/unsigned conversion during size promotion.
The function return_EIO returns an int but its used as a ssize_t with a
comparison to 0. This causes the range check to fail and copy_to_user copies way
too much.

This has been observed on iso9660 and squashfs on x86_64 machines.
Comment 4 Eugene Teo (Security Response) 2008-09-16 03:17:34 UTC 
Proposed upstream patch:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=be6aab0e9fa6d3c6d75aa1e38ac972d8b4ee82b8

Reference:
http://lkml.org/lkml/2007/1/3/150
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