Vulnerability CVE-2012-5374
Published: 2013-02-18

Description:
The CRC32C feature in the Btrfs implementation in the Linux kernel before 3.8-rc1 allows local users to cause a denial of service (extended runtime of kernel code) by creating many different files whose names are associated with the same CRC32C hash value.

See advisories in our WLB2 database:
Topic
Author
Date
Low
linux kernel Btrfs CRC32C infinite loop and privilege boundaries
Pascal Junod
14.12.2012

Type:

CWE-310

 (Cryptographic Issues)

CVSS2 => (AV:L/AC:H/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4/10
6.9/10
1.9/10
Exploit range
Attack complexity
Authentication
Local
High
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Linux -> Linux kernel 

 References:
https://github.com/torvalds/linux/commit/9c52057c698fb96f8f07e7a4bcf4801a092bda89
http://www.kernel.org/pub/linux/kernel/v3.x/testing/patch-3.8-rc1.bz2
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9c52057c698fb96f8f07e7a4bcf4801a092bda89
http://www.ubuntu.com/usn/USN-2017-1
http://www.ubuntu.com/usn/USN-1947-1
http://www.ubuntu.com/usn/USN-1946-1
http://www.ubuntu.com/usn/USN-1945-1
http://www.ubuntu.com/usn/USN-1944-1
http://openwall.com/lists/oss-security/2012/12/13/20
http://lists.opensuse.org/opensuse-security-announce/2013-03/msg00004.html
http://crypto.junod.info/2012/12/13/hash-dos-and-btrfs/
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