CVE-2020-3133 Cisco Email Security Appliance Content Filter Bypass Vulnerability

What is CVE-2020-3133?

CVE-2020-3133 is a medium-severity vulnerability in Cisco Email Security Appliance, published on 23 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the email message scanning of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass configured filters on the device. The vulnerability is due to improper validation of incoming emails. An attacker could exploit this vulnerability by sending a crafted email message to a recipient protected by the ESA. A successful exploit could allow the attacker to bypass the configured content filters, which could allow malicious content to pass through the device.

Weakness: CWE-20

Which versions are affected by CVE-2020-3133?

It affects 1 product.

Products include Cisco Email Security Appliance.

How do I fix CVE-2020-3133?

No fix has been published for CVE-2020-3133 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-3133 being exploited?

There is no known exploitation of CVE-2020-3133 in the wild and no public exploit code.

Other vulnerabilities in Cisco Email Security Appliance

• CVE-2022-20798 Cisco Email Security Appliance and Cisco Secure Email and Web Manager External Authentication Bypass Vulnerability Critical 9.8
• CVE-2015-6291 Denial of service in n/a High 7.8
• CVE-2022-20664 Cisco Email Security Appliance and Cisco Secure Email and Web Manager Information Disclosure Vulnerability High 7.7
• CVE-2022-20960 Denial of service in Cisco Secure Email High 7.5
• CVE-2018-0419 Security feature bypass in Email Security Appliance (ESA) High 7.5

All Cisco Email Security Appliance vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-g479-6ppw-v22h.