Resource exhaustion in Cisco AsyncOS for Cisco Email Security Appliance - CVE-2020-3132
Published: February 20, 2020
Vulnerability identifier: #VU25478
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-3132
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to inadequate parsing mechanisms for specific email body components in the email message scanning feature. A remote attacker can send a malicious email containing a high number of shortened URLs through an affected device, trigger resource exhaustion and perform a denial of service (DoS) attack.
Affected software
Cisco AsyncOS for Cisco Email Security Appliance
How to mitigate CVE-2020-3132
Install update from vendor's website.
Cisco AsyncOS for Cisco Email Security Appliance - addressed in versions 12.5.1 037, 13.0.0 375