Vulnerability · Published Sep 23, 2020 · Assigned by cisco

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

Medium 5.8

In plain English

A medium-severity improper input validation in Cisco Email Security Appliance (ESA) from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities).

Severity (CVSS 3.0)5.8Medium

Exploit odds (30 days)1.4%top 27.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco Email Security Appliance (ESA)	n/a

Weakness: CWE-20 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

References

20200122 Cisco Email Security Appliance Content Filter Bypass Vulnerability vendor-advisory, x_refsource_CISCO