Apple Mac OS X cs_validate_page function denial of service
| macosx-csvalidatepage-dos (38997) |  Medium Risk |
Description:
Apple Mac OS X is vulnerable to a denial of service attack, caused by improper bounds checking of user-supplied input by the cs_validate_page function in the bsd/kern/ubc_subr.c file. A local attacker could exploit this vulnerability by causing the hashes function to return a NULL value, resulting in a kernel panic.
*CVSS:
| Base Score: | 4.7 |
| Access Vector: | Local |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Complete |
| Temporal Score: | 3.7 |
| Exploitability: | Proof-of-Concept |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Apply Security Update 2008-003, available from the Apple Web site. See References.
References:
- Apple Web site: Apple.
- Apple Web site: About the security content of Security Update 2008-003 / Mac OS X 10.5.3.
- digit-labs Web site: Apple Mac OS X xnu <= 1228.0 cs_validate_page Local Kernel Denial of Service.
- BID-26840: Apple Mac OS X ubc_subr.c Local Denial of Service Vulnerability
- CVE-2007-6359: The cs_validate_page function in bsd/kern/ubc_subr.c in the xnu kernel 1228.0 and earlier in Apple Mac OS X 10.5.1 allows local users to cause a denial of service (failed assertion and system crash) via a crafted signed Mach-O binary that causes the hashes function to return NULL.
- SA28048: Mac OS X "cs_validate_page()" Local Denial of Service
- SA30430: Apple Mac OS X Security Update Fixes Multiple Vulnerabilities
- VUPEN/ADV-2007-4216: Apple Mac OS X cs_validate_page Local Denial of Service Vulnerability
- VUPEN/ADV-2008-1697: Apple Mac OS X Command Execution and Security Bypass Issues
Platforms Affected:
- Apple Mac OS X 10.5
- Apple Mac OS X 10.5.1
- Apple Mac OS X 10.5.2
- Apple Mac OS X Server 10.5
- Apple Mac OS X Server 10.5.1
- Apple Mac OS X Server 10.5.2
Reported:
Dec 12, 2007
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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.