Linux Kernel 3.3-3.8 sock_diag out-of-bounds

2013.02.24

Credit: Mathias

Risk: Medium

Local: No

Remote: Yes

CVE: CVE-2013-1763

CWE: CWE-20

CVSS Base Score: 7.2/10

Impact Subscore: 10/10

Exploitability Subscore: 3.9/10

Exploit range: Local

Attack complexity: Low

Authentication: No required

Confidentiality impact: Complete

Integrity impact: Complete

Availability impact: Complete

An unprivileged user can send a netlink message resulting in an
out-of-bounds access of the sock_diag_handlers[] array which, in turn,
allows userland to take over control while in kernel mode.
Patch (already in net/master):
http://thread.gmane.org/gmane.linux.network/260061
Affected versions:
v3.3 - v3.8
PoC is not attached this time but can be requested on demand. Hint:
Works well on Fedora 18, bypassing all mmap_min_addr checks. ;)
Thanks,
Mathias

References:

http://thread.gmane.org/gmane.linux.network/260061

See this note in RAW Version

Vote for this issue:

50%

Thanks for you vote!

Thanks for you comment!
Your message is in quarantine 48 hours.

Comment it here.

Nick (*)

Email (*)

Video

Text (*)

(*) - required fields.

{{ x.nick }} | Date: {{ x.ux * 1000 | date:'yyyy-MM-dd' }} {{ x.ux * 1000 | date:'HH:mm' }} CET+1

{{ x.comment }}

Linux Kernel 3.3-3.8 sock_diag out-of-bounds

References:

Thanks for you vote!

Thanks for you comment!Your message is in quarantine 48 hours.

Thanks for you comment!
Your message is in quarantine 48 hours.