Vulnerability CVE-2013-1819
Published: 2013-03-06   Modified: 2013-03-07

Description:
The _xfs_buf_find function in fs/xfs/xfs_buf.c in the Linux kernel before 3.7.6 does not validate block numbers, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by leveraging the ability to mount an XFS filesystem containing a metadata inode with an invalid extent map.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
Linux kernel xfs _xfs_buf_find NULL pointer dereference
P J P
05.03.2013

Type:

CWE-20

 (Improper Input Validation)

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

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.6/10
6.4/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Linux -> Linux kernel 

 References:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=eb178619f930fa2ba2348de332a1ff1c66a31424
https://github.com/torvalds/linux/commit/eb178619f930fa2ba2348de332a1ff1c66a31424
https://bugzilla.redhat.com/show_bug.cgi?id=918009
http://www.ubuntu.com/usn/USN-1975-1
http://www.ubuntu.com/usn/USN-1973-1
http://www.ubuntu.com/usn/USN-1972-1
http://www.ubuntu.com/usn/USN-1970-1
http://www.ubuntu.com/usn/USN-1969-1
http://www.ubuntu.com/usn/USN-1968-1
http://www.openwall.com/lists/oss-security/2013/03/05/10
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.7.6
http://lists.opensuse.org/opensuse-updates/2013-12/msg00129.html
http://lists.opensuse.org/opensuse-security-announce/2013-09/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2013-09/msg00003.html
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