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June 20, 2019Rewterz Threat Advisory – CVE-2019-1876 – Cisco WAAS (Wide Area Application Services) HTTPS Proxy Security Bypass Vulnerability
June 20, 2019
Severity
Medium
Analysis Summary
A vulnerability in the GZIP decompression engine of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass configured content filters on the device.
The vulnerability is due to improper validation of GZIP-formatted files. An attacker could exploit this vulnerability by sending a malicious file inside a crafted GZIP-compressed file. A successful exploit could allow the attacker to bypass configured content filters that would normally drop the email.
Impact
Security Bypass
Affected Vendors
Cisco
Affected Products
- Cisco AsyncOS
- Cisco Email Security Appliance 11.x
- Cisco Email Security Appliance 12.x
Remediation
Please see vendor’s advisory for more details.
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190619-esa-bypass