Linux Kernel parisc_show_stack() denial of service
| linux-kernel-pariscshowstack-dos (47075) |  Medium Risk |
Description:
Linux Kernel, when running on a PARISC 32bit or 64bit machine, is vulnerable to a denial of service, caused by an error in the parisc_show_stack() function when attempting to unwind a malformed stack. A local attacker could exploit this vulnerability to cause the system to crash.
*CVSS:
| Base Score: | 1.9 |
| Access Vector: | Local |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 1.4 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Upgrade to the latest version of Linux Kernel (2.6.28-rc7 or later), available from The Linux Kernel Archives Web site. See References.
References:
- linux-parisc Mailing List: [PATCH] fix unwind crash - was: Re: 2.6.26 kernel crash.
- The Linux Kernel Archives Web site: The Linux Kernel Archives.
- BID-32636: Linux Kernel 'parisc_show_stack()' Local Denial of Service Vulnerability
- CVE-2008-5395: The parisc_show_stack function in arch/parisc/kernel/traps.c in the Linux kernel before 2.6.28-rc7 on PA-RISC allows local users to cause a denial of service (system crash) via vectors associated with an attempt to unwind a stack that contains userspace addresses.
- DSA-1787: linux-2.6.24 -- denial of service/privilege escalation/information leak
- DSA-1794: linux-2.6 -- denial of service/privilege escalation/information leak
- SA32933: Linux Kernel PARISC "parisc_show_stack()" Denial of Service
- USN-715-1: Linux kernel vulnerabilities
Platforms Affected:
- Canonical Ubuntu 8.10
- Debian Debian Linux 4.0
- Linux Kernel 2.6.26
Reported:
Jul 29, 2008
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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.