Linux Kernel fs/compat_ioctl.c VIDEO_SET_SPU_PALETTE missing error check

2013.04.06

Credit: Marcus

Risk: Medium

Local: Yes

Remote: No

CVE: CVE-2013-1928

CWE: CWE-200

CVSS Base Score: 4.7/10

Impact Subscore: 6.9/10

Exploitability Subscore: 3.4/10

Exploit range: Local

Attack complexity: Medium

Authentication: No required

Confidentiality impact: Complete

Integrity impact: None

Availability impact: None

https://github.com/torvalds/linux/commit/12176503366885edd542389eed3aaf94be163fdb

 commit 12176503366885edd542389eed3aaf94be163fdb Author: Kees Cook
<keescook () chromium org> Date:   Thu Oct 25 13:38:16 2012 -0700

fs/compat_ioctl.c: VIDEO_SET_SPU_PALETTE missing error check

The compat ioctl for VIDEO_SET_SPU_PALETTE was missing an error
check while converting ioctl arguments.  This could lead to leaking
kernel stack contents into userspace.

Patch extracted from existing fix in grsecurity.

References:

https://github.com/torvalds/linux/commit/12176503366885edd542389eed3aaf94be163fdb

See this note in RAW Version

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Linux Kernel fs/compat_ioctl.c VIDEO_SET_SPU_PALETTE missing error check

References:

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