CVE-2021-33602: Denial-of-Service (DoS) Vulnerability

Published Oct 6, 2021

Updated

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 Anti-Virus engine.

Affected Software

4 affected components

F-Secure Atlant

F-Secure Cloud Protection Salesforce

F-Secure Internet Gatekeeper

F-Secure Linux Security

Remediation

Information

FIX No User action is required. The required fix has been published through the automatic update channel with Capricorn update 2021-09-29_03

Event History

Oct 6, 2021

CVE Published

via MITRE·09:59 AM

Data Sourced

via MITRE·09:59 AM

RemedyDescriptionSeverityWeakness

Frequently Asked Questions

What is CVE-2021-33602?

CVE-2021-33602 is a vulnerability affecting the F-Secure Antivirus engine when unpacking a zip archive, which can result in a Denial-of-Service.

How does CVE-2021-33602 affect F-Secure Antivirus?

CVE-2021-33602 affects F-Secure Antivirus by crashing the scanning engine when unpacking a zip archive using the LZW decompression method.

Can CVE-2021-33602 be exploited remotely?

Yes, CVE-2021-33602 can be exploited remotely by an attacker.

What is the severity of CVE-2021-33602?

CVE-2021-33602 has a severity rating of 5.3 (medium).

How can I fix CVE-2021-33602?

To fix CVE-2021-33602, ensure that you have applied the latest updates and patches provided by F-Secure.