PT-2012-1363 · Avast · Avast Internet Security
Published
2012-08-25
·
Updated
2024-08-07
·
CVE-2010-5151
CVSS v2.0
6.2
Medium
| Vector | AV:L/AC:H/Au:N/C:C/I:C/A:C |
Name of the Vulnerable Software and Affected Versions
avast! Internet Security version 5.0.462
Description
A race condition in avast! Internet Security allows local users to bypass kernel-mode hook handlers and execute dangerous code that would otherwise be blocked by a handler but not blocked by signature-based malware detection. This is achieved via certain user-space memory changes during hook-handler execution, also known as an argument-switch attack or a KHOBE attack. It is noted that this issue is disputed by some third parties because it is a flaw in a protection mechanism for situations where a crafted program has already begun to execute.
Recommendations
For avast! Internet Security version 5.0.462, consider disabling the kernel-mode hook handlers as a temporary workaround until a patch is available. Restrict access to user-space memory to minimize the risk of exploitation. Avoid executing crafted programs to prevent the bypass of protection mechanisms. At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Race Condition
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Weakness Enumeration
Related Identifiers
Affected Products
Avast Internet Security