CVE-2019-1817 Cisco Web Security Appliance Malformed Request Denial of Service Vulnerability
An unauthenticated remote attacker can cause a denial of service by sending malformed HTTP or HTTPS requests to the Cisco Web Security Appliance.
- 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-2019-1817?
CVE-2019-1817 is a high-severity denial of service vulnerability in Cisco Web Security Appliance, published on 3 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the web proxy functionality of Cisco AsyncOS Software for Cisco Web Security Appliance could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper validation of HTTP and HTTPS requests. An attacker could exploit this vulnerability by sending a malformed HTTP or HTTPS request to an affected device. An exploit could allow the attacker to cause a restart of the web proxy process, resulting in a temporary DoS condition.
Weakness: CWE-20
Which versions are affected by CVE-2019-1817?
It affects 1 product.
Products include Cisco Web Security Appliance.
How do I fix CVE-2019-1817?
No fix has been published for CVE-2019-1817 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-2019-1817 being exploited?
There is no known exploitation of CVE-2019-1817 in the wild and no public exploit code.
Other vulnerabilities in Cisco Web Security Appliance
Sources
Also known as GHSA-7577-f2mx-w9rc.