Denial-of-service (DoS) of the antivirus engine while unpacking a zip archive file.
RISK LEVEL: Medium
FIX: No user action is required. The required fix has been published through the automatic update channel with Capricorn update 2021-09-29_03.
A vulnerability affecting the F-Secure antivirus engine was discovered when the engine tries to unpack a zip archive (LZW decompression method), and this can crash the scanning engine. The vulnerability can be exploited remotely by an attacker. A successful attack will result in denial-of-service of the antivirus engine.
This issue was reported to F-Secure through the Vulnerability Reward Program. No known exploit or attack has been seen in the wild.
F-Secure Corporation would like to thank faty420 for bringing this issue to our attention.
Date Issued: 2021-10-06