CVE-2009-3624

MEDIUM

Description

The get_instantiation_keyring function in security/keys/keyctl.c in the KEYS subsystem in the Linux kernel before 2.6.32-rc5 does not properly maintain the reference count of a keyring, which allows local users to gain privileges or cause a denial of service (OOPS) via vectors involving calls to this function without specifying a keyring by ID, as demonstrated by a series of keyctl request2 and keyctl list commands.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=21279cfa107af07ef985539ac0de2152b9cba5f5

http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.html

http://marc.info/?l=oss-security&m=125619420905341&w=2

http://marc.info/?l=oss-security&m=125624091417161&w=2

http://secunia.com/advisories/37086

http://secunia.com/advisories/38017

http://twitter.com/spendergrsec/statuses/4916661870

http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc5

http://www.ubuntu.com/usn/usn-864-1

Details

Source: MITRE

Published: 2009-11-02

Updated: 2012-03-19

Type: CWE-310

Risk Information

CVSS v2.0

Base Score: 4.6

Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 3.9

Severity: MEDIUM