CVE-2021-33602 : Vulnerability Insights and Analysis
Learn about CVE-2021-33602 that affects F-Secure Antivirus engine, causing Denial-of-Service. Find out about impacted systems, exploitability, and mitigation steps.
A vulnerability affecting the F-Secure Antivirus engine was discovered that could lead to a Denial-of-Service (DoS) attack when unpacking a zip archive. This CVE impacts F-Secure endpoint protection products and F-Secure Linux Security.
Understanding CVE-2021-33602
This section will delve into the details of the vulnerability, its impacts, technical aspects, and mitigation strategies.
What is CVE-2021-33602?
CVE-2021-33602 is a Denial-of-Service (DoS) vulnerability that affects F-Secure Antivirus engine. Remote attackers could exploit this vulnerability by causing the scanning engine to crash, leading to a DoS condition.
The Impact of CVE-2021-33602
The vulnerability can be exploited remotely, potentially resulting in a Denial-of-Service of the Anti-Virus engine. The CVSS base score is 5.5, categorizing it as a medium severity issue.
Technical Details of CVE-2021-33602
Vulnerability Description
The vulnerability occurs when the engine attempts to unpack a zip archive using the LZW decompression method, triggering a crash in the scanning engine.
Affected Systems and Versions
F-Secure endpoint protection products on Windows and Mac, F-Secure Linux Security (32-bit & 64-bit), F-Secure Atlant, and F-Secure Cloud Protection for Salesforce are all impacted.
Exploitation Mechanism
Attackers can exploit this vulnerability remotely without requiring high privileges, leading to a potential Denial-of-Service attack.
Mitigation and Prevention
To address CVE-2021-33602, users are advised to take immediate action to prevent exploitation and ensure long-term security.
Immediate Steps to Take
No user action is required as the fix has been issued through an automatic update channel with Capricorn update 2021-09-29_03.
Long-Term Security Practices
Ensure that systems are regularly updated with the latest security patches and consider additional security measures to prevent future vulnerabilities.
Patching and Updates
Regularly check for security advisories from F-Secure and promptly apply patches to mitigate the risk of exploitation.