Input validation error in Linux kernel - CVE-2009-4895
Published: September 8, 2010 / Updated: September 8, 2020
Vulnerability identifier: #VU46358
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2009-4895
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows local users to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via unknown vectors, related to the put_tty_queue and __f_setown functions.
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-2009-4895
Update to version 2.6.32.6.
Linux kernel - update to 2.6.32.6
linux-source-2.6.15 (Ubuntu package) - update to 2.6.15-55.89
linux (Ubuntu package) - addressed in versions 2.6.24-28.80, 2.6.28-19.66, 2.6.31-22.67, 2.6.32-25.45, 2.6.35-22.35
linux-source-2.6.15 (Ubuntu package) - update to 2.6.15-55.89
linux (Ubuntu package) - addressed in versions 2.6.24-28.80, 2.6.28-19.66, 2.6.31-22.67, 2.6.32-25.45, 2.6.35-22.35
External References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=703625118069f9f8960d356676662d3db5a9d116
- http://www.debian.org/security/2010/dsa-2094
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.32.6
- http://www.openwall.com/lists/oss-security/2010/06/15/2
- http://www.openwall.com/lists/oss-security/2010/06/15/3
- http://www.openwall.com/lists/oss-security/2010/06/15/4
- http://www.openwall.com/lists/oss-security/2010/06/15/5
- http://www.ubuntu.com/usn/USN-1000-1
- https://bugzilla.kernel.org/show_bug.cgi?id=14605
- https://bugzilla.redhat.com/show_bug.cgi?id=559100