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Avast! antivirus buffer overflow vulnerability

Vulnerability Note VU#125868

Original Release Date: 2007-05-29 | Last Revised: 2007-05-29


Avast! antivirus contains a buffer overflow vulnerability. This vulnerability may allow an attacker to execute code a vulnerable system.


Avast! antivirus is an antivirus application that can scan different types of files. The Symbian Installer Format (SIS) file format is used by the Symbian OS to package files for distribution to mobile devices.

Avast! antivirus contains a buffer overflow vulnerability. By convincing a user to scan a specially crafted SIS file with a vulnerable version of Avast! antivirus, an attacker may be able to trigger the overflow.


A remote unauthenticated attacker may be able to execute arbitrary code, or create a denial-of-service condition.


Version 4.7.700 has been released to address this issue. Users are encouraged to update as soon as possible.

Vendor Information

Affected   Unknown   Unaffected

Avast! Antivirus Software

Notified:  May 25, 2007 Updated:  May 29, 2007



Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


See for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A



Thanks to Sergio Alvarez of n.runs AG and Avast! for information that was used in this report.

This document was written by Ryan Giobbi.

Other Information

CVE IDs: None
Severity Metric: 1.15
Date Public: 2007-05-25
Date First Published: 2007-05-29
Date Last Updated: 2007-05-29 12:35 UTC
Document Revision: 5

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