CVE-2020-3257 Cisco IOx Application Environment for IOS Software for Cisco Industrial Routers Vulnerabilities

High 8.1 Published 3 Jun 2020 Updated 15 Nov 2024

Attackers can cause denial of service or execute arbitrary code with elevated privileges on Cisco Industrial Routers via the IOx application environment.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-3257?

CVE-2020-3257 is a high-severity memory corruption vulnerability in Cisco Ios, published on 3 Jun 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Multiple vulnerabilities in the Cisco IOx application environment of Cisco 809 and 829 Industrial Integrated Services Routers (Industrial ISRs) and Cisco 1000 Series Connected Grid Routers (CGR1000) that are running Cisco IOS Software could allow an attacker to cause a denial of service (DoS) condition or execute arbitrary code with elevated privileges on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

Weakness: CWE-119, CWE-20

Which versions are affected by CVE-2020-3257?

It affects 1 product.

Products include Cisco Ios.

How do I fix CVE-2020-3257?

No fix has been published for CVE-2020-3257 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2020-3257 being exploited?

There is no known exploitation of CVE-2020-3257 in the wild and no public exploit code.

All Cisco Ios vulnerabilities

Sources

Also known as GHSA-hj3c-74jp-76r5.