Description
Heap out-of-bounds read vulnerability in Avast Antivirus when scanning a malformed zip file containing XML may allow Local Execution of Code or Denial-of-Service of the antivirus process. This issue affects Avast Antivirus, AVG Antivirus, Norton Antivirus, Avast One, and Avast Business Antivirus on Windows, macOS, and Linux for virus definition builds from 25020100 before 25021208. The affected scanning logic is delivered through a shared Gen Digital virus definition update stream. The same stream feeds the consumer antivirus products listed in this advisory and other Gen Digital products that embed the same engine. Mitigation flows through this update channel; installations at or above the listed build are not vulnerable regardless of which product consumes the stream.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Gen Digital Avast Antivirus
Default version status: affected
25020100 to < 25021208affected
Gen Digital AVG Antivirus
Default version status: affected
25020100 to < 25021208affected
Gen Digital Norton Antivirus
Default version status: affected
25020100 to < 25021208affected
Gen Digital Avast One
Default version status: affected
25020100 to < 25021208affected
Gen Digital Avast Business Antivirus
Default version status: affected
25020100 to < 25021208affected