PT-2009-5898 · Linux · Linux Kernel

Alexander Zangerl · Published 2009-11-02 · Updated 2023-02-13 · CVE-2009-3624

Positive Technologies (AI Summary)

CVSS v2.0

4.6

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 2.6.32-rc5

Description The issue is related to the get instantiation keyring function in the KEYS subsystem, which does not properly maintain the reference count of a keyring. This allows local users to gain privileges or cause a denial of service via vectors involving calls to this function without specifying a keyring by ID. The exploitation can be demonstrated by a series of keyctl request2 and keyctl list commands.

Recommendations For Linux kernel versions prior to 2.6.32-rc5, update to version 2.6.32-rc5 or later to resolve the issue.

Fix

Weakness Enumeration

CWE-310

Related Identifiers

CVE-2009-3624

Affected Products

Linux Kernel

References · 10

• http://kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc5 · Vendor Advisory
• http://ubuntu.com/usn/usn-864-1 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2009-3624 · Security Note
• http://secunia.com/advisories/37086 · Vendor Advisory
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=21279cfa107af07ef985539ac0de2152b9cba5f5 · Note
• http://twitter.com/spendergrsec/statuses/4916661870 · Note
• http://marc.info/?l=oss-security&m=125619420905341&w=2 · Note
• http://marc.info/?l=oss-security&m=125624091417161&w=2 · Note
• http://secunia.com/advisories/38017 · Note