CVE-2021-1359 Cisco Web Security Appliance Privilege Escalation Vulnerability

Medium 6.3 Published 8 Jul 2021 Updated 7 Nov 2024

Authenticated attackers can inject commands via crafted XML uploads to execute arbitrary code and gain root privileges on Cisco WSA devices.

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-2021-1359?

CVE-2021-1359 is a medium-severity command injection vulnerability in Cisco Asyncos, published on 8 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability in the configuration management of Cisco AsyncOS for Cisco Web Security Appliance (WSA) could allow an authenticated, remote attacker to perform command injection and elevate privileges to root. This vulnerability is due to insufficient validation of user-supplied XML input for the web interface. An attacker could exploit this vulnerability by uploading crafted XML configuration files that contain scripting code to a vulnerable device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system and elevate privileges to root. An attacker would need a valid user account with the rights to upload configuration files to exploit this vulnerability.

Weakness: CWE-112

Which versions are affected by CVE-2021-1359?

It affects 2 products.

Products include Cisco Asyncos, Cisco Web Security Appliance.

How do I fix CVE-2021-1359?

No fix has been published for CVE-2021-1359 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2021-1359 being exploited?

There is no known exploitation of CVE-2021-1359 in the wild and no public exploit code.

All Cisco Asyncos vulnerabilities

Sources

Also known as GHSA-9x2v-q9rg-r4cc.