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.
*CVSS:
| Base Score: | 2.1 |
| Access Vector: | Local |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 1.6 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Apply the patch for this vulnerability (b/kernel/hrtimer.c), available from the Linux kernel GIT Repository. See References.
References:
- Linux Kernel GIT Repository: [PATCH] hrtimer: prevent overrun DoS in hrtimer_forward().
- The Linux Kernel Archives Web site: The Linux Kernel Archives.
- 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
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 Client
- RedHat Enterprise Linux 5
- RedHat Linux Advanced Workstation 2.1 Itanium
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
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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 IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.