CVE-2020-3181 Cisco Email Security Appliance Uncontrolled Resource Exhaustion Vulnerability
Unauthenticated attackers can exhaust resources via crafted emails, causing delays and potentially delivering malware to users on Cisco Email Security Appliances.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-3181?
CVE-2020-3181 is a medium-severity denial of service vulnerability in Cisco Email Security Appliance, published on 4 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the malware detection functionality in Cisco Advanced Malware Protection (AMP) in Cisco AsyncOS Software for Cisco Email Security Appliances (ESAs) could allow an unauthenticated remote attacker to exhaust resources on an affected device. The vulnerability is due to insufficient control over system memory allocation. An attacker could exploit this vulnerability by sending a crafted email through the targeted device. A successful exploit could allow the attacker to cause an email attachment that contains malware to be delivered to a user and cause email processing delays.
Weakness: CWE-400
Which versions are affected by CVE-2020-3181?
It affects 1 product.
Products include Cisco Email Security Appliance.
How do I fix CVE-2020-3181?
No fix has been published for CVE-2020-3181 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-3181 being exploited?
There is no known exploitation of CVE-2020-3181 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
- CVE-2015-6291 Denial of service in n/a
- CVE-2022-20664 Cisco Email Security Appliance and Cisco Secure Email and Web Manager Information Disclosure Vulnerability
- CVE-2022-20960 Denial of service in Cisco Secure Email
- CVE-2018-0419 Security feature bypass in Email Security Appliance (ESA)
Sources
Also known as GHSA-76gp-2rvp-j8f4.