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


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