CVE-2019-15956 Cisco Web Security Appliance Unauthorized Device Reset Vulnerability

High 8.8 Published 26 Nov 2019 Updated 20 Nov 2024

Authenticated attackers can bypass authorization to reset the device, gaining admin access or causing denial of service.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-15956?

CVE-2019-15956 is a high-severity missing authorization vulnerability in Cisco Asyncos, published on 26 Nov 2019. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability in the web management interface of Cisco AsyncOS Software for Cisco Web Security Appliance (WSA) could allow an authenticated, remote attacker to perform an unauthorized system reset on an affected device. The vulnerability is due to improper authorization controls for a specific URL in the web management interface. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could have a twofold impact: the attacker could either change the administrator password, gaining privileged access, or reset the network configuration details, causing a denial of service (DoS) condition. In both scenarios, manual intervention is required to restore normal operations.

Weakness: CWE-284

Which versions are affected by CVE-2019-15956?

It affects 2 products.

Products include Cisco Asyncos, Cisco Web Security Appliance.

How do I fix CVE-2019-15956?

No fix has been published for CVE-2019-15956 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2019-15956 being exploited?

There is no known exploitation of CVE-2019-15956 in the wild and no public exploit code.

All Cisco Asyncos vulnerabilities

Sources

Also known as GHSA-8pmp-qg97-8gmp.