CVE-2021-33599 Denial-of-Service (DoS) Vulnerability
Remote attackers can cause a denial of service in F-Secure Antivirus engines by submitting malicious WIM archive files, leading to infinite loops and freezing the scanner.
- 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-2021-33599?
CVE-2021-33599 is a medium-severity denial of service vulnerability 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, published on 7 Sep 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 vulnerability affecting F-Secure Antivirus engine was discovered whereby scanning WIM archive file can lead to denial-of-service (infinite loop and freezes AV engine scanner). The vulnerability can be exploit remotely by an attacker. A successful attack will result in Denial-of-Service of the Anti-Virus engine.
Weakness: CWE-835
Which versions are affected by CVE-2021-33599?
It affects 4 products.
Products include F-Secure Atlant, F-Secure Cloud Protection for Salesforce, F-Secure Elements Endpoint Protection, F-Secure Linux Security.
How do I fix CVE-2021-33599?
No fix has been published for CVE-2021-33599 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-2021-33599 being exploited?
There is no known exploitation of CVE-2021-33599 in the wild and no public exploit code.
Other vulnerabilities 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
Sources
Also known as GHSA-6f5f-78pr-p7q9.