#VU44878 NULL pointer dereference in Linux kernel - CVE-2011-1093
Published: July 19, 2011 / Updated: August 11, 2020
Vulnerability identifier: #VU44878
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/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-2011-1093
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in net/dccp/input.c in the Datagram Congestion Control Protocol (DCCP) implementation in the Linux kernel before 2.6.38 does not properly handle packets for a CLOSED endpoint, which allows remote attackers to cause a denial of service (NULL pointer dereference and OOPS) by sending a DCCP-Close packet followed by a DCCP-Reset packet. A remote attacker can perform a denial of service (DoS) attack.
Remediation
Update to version 2.6.38.
External links
- http://downloads.avaya.com/css/P8/documents/100145416
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=720dc34bbbe9493c7bd48b2243058b4e447a929d
- http://openwall.com/lists/oss-security/2011/03/08/19
- http://openwall.com/lists/oss-security/2011/03/08/4
- http://rhn.redhat.com/errata/RHSA-2011-0833.html
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.38
- http://www.securityfocus.com/bid/46793
- https://bugzilla.redhat.com/show_bug.cgi?id=682954