Linux kernel hrtimer_forward denial of service
| linux-kernel-hrtimerforward-dos (41827) |  Low Risk |
Description:
Linux kernel, when running on a 64-bit system, is vulnerable to a denial of service, caused by an integer overflow error in the hrtimer_forward function. By using a timer with a large expiry value that causes constant time expiration, a local attacker could cause the application to enter into an infinite loop resulting in a denial of service.
Platforms Affected:
- Canonical, Ubuntu 6.06 LTS
- Canonical, Ubuntu 7.04
- Canonical, Ubuntu 7.10
- Canonical, Ubuntu 8.04 LTS
- Debian, Debian Linux 4.0
- Linux, Kernel 2.6.21 rc4
- Novell, OpenSUSE 10.2
- Novell, OpenSUSE 10.3
- RedHat, Enterprise Linux 4 WS
- RedHat, Enterprise Linux 5
- RedHat, Enterprise Linux 5 Client
- RedHat, Linux Advanced Workstation 2.1 Itanium
Remedy:
Apply the patch for this vulnerability (b/kernel/hrtimer.c), available from the Linux kernel GIT Repository. See References.
Consequences:
Denial of Service
References:
- Linux Kernel GIT Repository, [PATCH] hrtimer: prevent overrun DoS in hrtimer_forward() at http://git.kernel.org/?p=linux/kernel/git/chris/linux-2.6.git;a=commitdiff;h=13788ccc41ceea5893f9c747c59bc0b28f2416c2.
- The Linux Kernel Archives Web site, The Linux Kernel Archives at http://www.kernel.org/.
- BID-29294: Linux Kernel 'hrtimer_forward()' Local Denial of Service Vulnerability
- CVE-2007-6712: Integer overflow in the hrtimer_forward function (hrtimer.c) in Linux kernel 2.6.21-rc4, when running on 64-bit systems, allows local users to cause a denial of service (infinite loop) via a timer with a large expiry value, which causes the timer to always be expired.
- DSA-1588: linux-2.6 -- denial of service
- RHSA-2008-0275: Important: kernel security and bug fix update
- RHSA-2008-0585: Important: kernel security and bug fix update
- SUSE-SA:2008:030: Linux kernel security update
- USN-625-1: Linux kernel vulnerabilities
Reported:
Mar 16, 2008
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
For corrections or additions please email xforce@iss.net