CVE-2020-26082 : Vulnerability Insights and Analysis
Learn about CVE-2020-26082 affecting Cisco Email Security Appliance. Discover the impact, affected versions, and mitigation steps for this zip bypass vulnerability.
A vulnerability in the zip decompression engine of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass content filters that are configured on an affected device.
Understanding CVE-2020-26082
This CVE-2020-26082 vulnerability affects Cisco Email Security Appliance (ESA) due to improper handling of password-protected zip files.
What is CVE-2020-26082?
The vulnerability allows attackers to bypass content filters by sending a malicious file inside a crafted zip-compressed file to the affected device.
The Impact of CVE-2020-26082
If successfully exploited, attackers can bypass configured content filters that would normally drop the email.
Technical Details of CVE-2020-26082
The following technical details provide insight into the vulnerability:
Vulnerability Description
- Vulnerability in zip decompression engine of Cisco AsyncOS Software
- Improper handling of password-protected zip files
Affected Systems and Versions
- Vendor: Cisco
- Product: Cisco Email Security Appliance (ESA)
- Vulnerable Versions: <13.5.2
Exploitation Mechanism
- Attacker sends a malicious file inside a crafted zip-compressed file to the affected device
Mitigation and Prevention
Taking immediate steps and implementing long-term security practices are crucial:
Immediate Steps to Take
- Apply vendor patches promptly
- Monitor network traffic for any signs of exploitation
Long-Term Security Practices
- Regularly update and patch software and systems
- Implement email security best practices
Patching and Updates
- Refer to the Cisco Security Advisory for patch details and instructions