Input validation error in Cisco AsyncOS for Cisco Email Security Appliance - CVE-2020-3133
Published: January 27, 2020
Vulnerability identifier: #VU24669
CSH Severity: Medium
CVSS v4.0: 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
CVE-ID: CVE-2020-3133
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco AsyncOS for Cisco Email Security Appliance
Cisco AsyncOS for Cisco Email Security Appliance
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass configured filters on the target device.
The vulnerability exists due to improper validation of incoming emails. A remote attacker can send a specially crafted email message to a recipient protected by the ESA and bypass the configured content filters, which could allow malicious content to pass through the device.
How to mitigate CVE-2020-3133
Install updates from vendor's website.