CVE-2021-1370 Privilege escalation in Cisco IOS XR Software

What is CVE-2021-1370?

CVE-2021-1370 is a high-severity vulnerability in Cisco Ios Xr, published on 4 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in a CLI command of Cisco IOS XR Software for the Cisco 8000 Series Routers and Network Convergence System 540 Series Routers running NCS540L software images could allow an authenticated, local attacker to elevate their privilege to root. To exploit this vulnerability, an attacker would need to have a valid account on an affected device. The vulnerability is due to insufficient validation of command line arguments. An attacker could exploit this vulnerability by authenticating to the device and entering a crafted command at the prompt. A successful exploit could allow an attacker with low-level privileges to escalate their privilege level to root.

Weakness: CWE-78

Which versions are affected by CVE-2021-1370?

It affects 1 product.

Products include Cisco Ios Xr.

How do I fix CVE-2021-1370?

No fix has been published for CVE-2021-1370 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-1370 being exploited?

There is no known exploitation of CVE-2021-1370 in the wild and no public exploit code.

Other vulnerabilities in Cisco Ios Xr

• CVE-2020-3118 Cisco IOS XR Software Discovery Protocol Format String Exploited High 8.8
• CVE-2020-3569 Cisco IOS XR Software DVMRP Memory Exhaustion Exploited High 8.6
• CVE-2020-3566 Cisco IOS XR Software DVMRP Memory Exhaustion Exploited High 8.6
• CVE-2010-3035 Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Exploited High 7.5
• CVE-2022-20821 Cisco IOS XR Open Port Exploited Medium 6.5

All Cisco Ios Xr vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-g2w2-8h95-w988.