A weakness has been reported in some Symantec products, which can potentially be exploited to bypass the scanning functionality.

The weakness is caused due to an unspecified error in the on-demand scanning functionality, which can potentially be exploited to bypass the scan via another entity that denies read access to Symantec AntiVirus or Symantec Enterprise Protection.

Successful exploitation requires that Tamper Protection is disabled and an attacker is able to pass certain events to the application.

The weakness is reported in Symantec AntiVirus 10.0.x and 10.1.x, and 10.2.x, Symantec Client Security 3.0.x and 3.1.x.

Solution
Update to the latest versions and ensure that Tamper Protection is enabled.
Further details available to Secunia VIM customers

Provided and/or discovered by
The vendor credits Jeffrey Walton and Dr. Brooke Stephens

Changelog
Further details available to Secunia VIM customers

Original Advisory
Symantec SYM10-002:
http://www.symantec.com/business/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2010&suid=20100217_00

Deep Links
Links available to Secunia VIM customers