CVE-2018-0410 Denial of service in AsyncOS Software for Cisco Web Security Appliances

High 8.6 Published 15 Aug 2018 Updated 26 Nov 2024

Unauthenticated remote attackers can exhaust system memory via excessive TCP connections, causing a denial of service on Cisco Web 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-2018-0410?

CVE-2018-0410 is a high-severity denial of service vulnerability in Cisco Web Security Appliance, published on 15 Aug 2018. 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 Appliances could allow an unauthenticated, remote attacker to exhaust system memory and cause a denial of service (DoS) condition on an affected system. The vulnerability exists because the affected software improperly manages memory resources for TCP connections to a targeted device. An attacker could exploit this vulnerability by establishing a high number of TCP connections to the data interface of an affected device via IPv4 or IPv6. A successful exploit could allow the attacker to exhaust system memory, which could cause the system to stop processing new connections and result in a DoS condition. System recovery may require manual intervention. Cisco Bug IDs: CSCvf36610.

Weakness: CWE-400

Which versions are affected by CVE-2018-0410?

It affects 1 product.

Products include Cisco Web Security Appliance.

How do I fix CVE-2018-0410?

No fix has been published for CVE-2018-0410 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-2018-0410 being exploited?

There is no known exploitation of CVE-2018-0410 in the wild and no public exploit code.

All Cisco Web Security Appliance vulnerabilities

Sources

Also known as GHSA-7vx9-5h56-f698.