NULL pointer dereference in Linux kernel - CVE-2009-2767
Published: August 14, 2009 / Updated: June 4, 2024
Vulnerability identifier: #VU91018
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2009-2767
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to NULL pointer dereference within the no_timer_create() and init_posix_timers() functions in kernel/posix-timers.c. A local user can execute arbitrary code.
Affected software
Linux kernel
Ubuntu
linux-source-2.6.15 (Ubuntu package)
linux (Ubuntu package)
Ubuntu
linux-source-2.6.15 (Ubuntu package)
linux (Ubuntu package)
How to mitigate CVE-2009-2767
Install update from vendor's website.
linux-source-2.6.15 (Ubuntu package) - update to 2.6.15-55.80
linux (Ubuntu package) - addressed in versions 2.6.24-25.63, 2.6.27-15.43, 2.6.28-16.55
linux (Ubuntu package) - addressed in versions 2.6.24-25.63, 2.6.27-15.43, 2.6.28-16.55
Links to Public Exploits and PoC-codes
External References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=70d715fd0597f18528f389b5ac59102263067744
- http://lkml.org/lkml/2009/8/4/28
- http://lkml.org/lkml/2009/8/4/40
- http://secunia.com/advisories/36200
- http://secunia.com/advisories/37105
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc6
- http://www.openwall.com/lists/oss-security/2009/08/06/2
- http://www.ubuntu.com/usn/USN-852-1
- http://www.vupen.com/english/advisories/2009/2197
- https://exchange.xforce.ibmcloud.com/vulnerabilities/52317