rugginello has discovered a vulnerability in AntiVir PersonalEdition, which can be exploited by malicious, local users to gain escalated privileges.

The vulnerability is caused due to the update.exe process using the progress bar control which accepts the PBM_GETRANGE and PBM_SETRANGE messages from arbitrary users and does not verify the IParam parameter. This can be exploited to write an arbitrary value to an arbitrary memory address when using the update functionality.

Successful exploitation may allow execution of arbitrary code with SYSTEM privileges.

The vulnerability has been confirmed in version 7.0 build 151 (Classic). Other versions may also be affected.

Solution
Fixed in version 7.02 build 180.

Provided and/or discovered by
rugginello

Changelog
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