CVE-2020-3132 Cisco Email Security Appliance Shortened URL Denial of Service Vulnerability
An unauthenticated remote attacker can cause a temporary denial of service on Cisco Email Security Appliances by sending emails with many shortened URLs.
- 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-2020-3132?
CVE-2020-3132 is a medium-severity denial of service vulnerability in Cisco Email Security Appliance, published on 19 Feb 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 feature of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to cause a temporary denial of service (DoS) condition on an affected device. The vulnerability is due to inadequate parsing mechanisms for specific email body components. An attacker could exploit this vulnerability by sending a malicious email containing a high number of shortened URLs through an affected device. A successful exploit could allow the attacker to consume processing resources, causing a DoS condition on an affected device. To successfully exploit this vulnerability, certain conditions beyond the control of the attacker must occur.
Weakness: CWE-400
Which versions are affected by CVE-2020-3132?
It affects 2 products.
Products include Cisco Cloud Email Security, Cisco Email Security Appliance.
How do I fix CVE-2020-3132?
No fix has been published for CVE-2020-3132 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-2020-3132 being exploited?
There is no known exploitation of CVE-2020-3132 in the wild and no public exploit code.
Other vulnerabilities in Cisco Email Security Appliance
Sources
Also known as GHSA-xhcj-87mg-4cx4.