CVE-2021-33602 Denial-of-Service (DoS) Vulnerability
Remote attackers can crash the F-Secure Antivirus scanning engine by sending a malicious zip archive, 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-2021-33602?
CVE-2021-33602 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 6 Oct 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 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.
Which versions are affected by CVE-2021-33602?
It affects 4 products.
Products include F-Secure Atlant, F-Secure Cloud Protection, F-Secure Internet Gatekeeper, F-Secure Linux Security.
How do I fix CVE-2021-33602?
No fix has been published for CVE-2021-33602 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-2021-33602 being exploited?
There is no known exploitation of CVE-2021-33602 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-cmvq-g5cv-ggqg.