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n.runs AG http://www.nruns.com/ security(at)nruns.com n.runs-SA-2007.008 24-May-2007
Vendor: ALWIL Software a.s., http://www.avast.com Affected Product: avast! antivirus Vulnerability: Arbitrary Code Execution (remote) Risk: HIGH
2007/05/07 initial notification to ALWIL Software a.s.
2007/05/07 ALWIL Software a.s. Response
2007/05/07 PoC files sent to ALWIL Software a.s.
2007/05/09 ALWIL Software a.s. Response
2007/05/09 resent PoC files sent to ALWIL Software a.s.
2007/05/09 ALWIL Software a.s. acknowledge the PoC files
2007/05/10 ALWIL Software a.s. issued the fix for testing
2007/05/16 ALWIL Software a.s. released Update with fixes
The company specializes in security software, with avast! antivirus being
the flagship product line. During the lifetime of the product line, avast!
products have become both award winning, and number one in a number of key
markets, as well as increasing market share year-on-year since first
On 11th May 2007 avastR! antivirus Home Edition reached 30 million registered users.
A remotely exploitable vulnerability has been found in the file parsing engine.
In detail, the following flaw was determined:
This problem can lead to remote arbitrary code execution if an attacker carefully crafts a file that exploits the aforementioned vulnerability. The vulnerability is present in avast! Antivirus software versions prior to the update Version 4.7.700.
The vulnerability was reported on 07.May.2007 and an update has been issued on 16.May.2007 to solve this vulnerability through the regular update mechanism.
Bugs found by Sergio Alvarez of n.runs AG.
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