CVE-2021-33572 Denial-of-Service (DoS) Vulnerability
Remote attackers can crash the F-Secure Linux Security anti-virus engine by sending large or fuzzed files, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-33572?
CVE-2021-33572 is a low-severity denial of service vulnerability in F-Secure Products, published on 21 Jun 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A Denial-of-Service (DoS) vulnerability was discovered in F-Secure Linux Security whereby the FSAVD component used in certain F-Secure products can crash while scanning larger packages/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.
Weakness: CWE-476
Which versions are affected by CVE-2021-33572?
It affects 4 products.
Products include F-Secure Cloud Protection for Salesforce, F-Secure Elements for Microsoft 365, F-Secure Endpoint Protection, F-Secure Linux Security.
How do I fix CVE-2021-33572?
No fix has been published for CVE-2021-33572 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-33572 being exploited?
There is no known exploitation of CVE-2021-33572 in the wild and no public exploit code.
Other vulnerabilities in F-Secure Products
Sources
Also known as GHSA-396f-8jhp-q236.