Input validation error in Linux kernel - CVE-2009-4895
Published: September 8, 2010 / Updated: September 8, 2020
Vulnerability identifier: #VU46358
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2009-4895
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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.
How to mitigate CVE-2009-4895
Update to version 2.6.32.6.
Sources
- 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