Sophos Anti-Virus SSDT() denial of service
| sophos-ssdt-dos (42083) |  Low Risk |
Description:
Sophos Anti-Virus is vulnerable to a denial of service, caused by improper validation of user-supplied input when handling arguments passed to the "NtCreateKey()" System Service Descriptor Table (SSDT) function. If the Runtime Behavioural Analysis setting is enabled, a local attacker could invoke the vulnerable function with specially-crafted arguments and cause a denial of service.
Platforms Affected:
- Sophos, Sophos Anti-Virus 7.0.5
Remedy:
No remedy available as of October 4, 2008.
Consequences:
Denial of Service
References:
- CORE-2008-0320, Insufficient argument validation of hooked SSDT functions on multiple Antivirus and Firewalls at http://www.coresecurity.com/index.php5?module=ContentMod&action=item&id=2249.
- Sophos Knowledgebase Article ID: 37810, Sophos Anti-Virus for Windows 2000+, denial of service vulnerability at http://www.sophos.com/support/knowledgebase/article/37810.html.
- BID-28743: Sophos Anti-Virus SSDT Hooks Local Denial of Service Vulnerability
- CVE-2008-1737: Sophos Anti-Virus 7.0.5, and other 7.x versions, when Runtime Behavioural Analysis is enabled, allows local users to cause a denial of service (reboot with the product disabled) and possibly gain privileges via a zero value in a certain length field in the ObjectAttributes argument to the NtCreateKey hooked System Service Descriptor Table (SSDT) function.
- FrSIRT/ADV-2008-1381: Sophos Anti-Virus NtCreateKeyHook() Denial of Service Vulnerability
- SA29996: Sophos Anti-Virus "NtCreateKey()" Hooked Function Denial of Service
- SECTRACK ID: 1019945: Sophos Anti-Virus Lets Local Users Deny Service and Potentially Gain Elevated Privileges
Reported:
Apr 28, 2008
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