SB2020110541 - Zip Content Filter Bypass in Cisco Email Security Appliance
Published: November 5, 2020
Security Bulletin ID
SB2020110541
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Input validation error (CVE-ID: CVE-2020-26082)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to bypass content filters that are configured on an affected device.
The vulnerability exists due to improper handling of password-protected zip files. A remote attacker can send a malicious file inside a specially crafted zip-compressed file and bypass configured content filters that would normally drop the email.
Remediation
Install update from vendor's website.