Vulnerability · Published Oct 8, 2021 · Assigned by F-SecureUS

CVE-2021-33603Denial-of-Service (DoS) Vulnerability

Medium 5.5

In plain English

A medium-severity security flaw in F-Secure endpoint protection products on Windows and Mac. F-Secure Linux Security (32-bit) F-Secure Linux Security 64 F-Secure Atlant F-Secure Cloud Protection for Salesforce and Cloud Protection f from F-Secure. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium

Exploit odds (30 days)0.6%top 53.0% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

A Denial-of-Service (DoS) vulnerability was discovered in F-Secure Atlant whereby the AVPACK module component used in certain F-Secure products can crash while scanning a fuzzed files. The exploit can be triggered remotely by an attacker. A successful attack will result in Denial-of-Service (DoS) of the Anti-Virus engine.

Affected products (as reported)

Vendor	Product	Versions
F-Secure	F-Secure endpoint protection products on Windows and Mac. F-Secure Linux Security (32-bit) F-Secure Linux Security 64 F-Secure Atlant F-Secure Cloud Protection for Salesforce and Cloud Protection for Microsoft Office 365	All Version

References

https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame x_refsource_MISC
https://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-33603 x_refsource_MISC