CVE-2021-34721 Cisco IOS XR Software Command Injection Vulnerabilities
Authenticated local attackers can exploit CLI vulnerabilities to gain root shell access and execute arbitrary commands on Cisco IOS XR devices.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-34721?
CVE-2021-34721 is a medium-severity command injection vulnerability in Cisco Ios Xr, published on 9 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Multiple vulnerabilities in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to gain access to the underlying root shell of an affected device and execute arbitrary commands with root privileges. For more information about these vulnerabilities, see the Details section of this advisory.
Weakness: CWE-78
Which versions are affected by CVE-2021-34721?
It affects 1 product.
Products include Cisco Ios Xr.
How do I fix CVE-2021-34721?
No fix has been published for CVE-2021-34721 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-2021-34721 being exploited?
There is no known exploitation of CVE-2021-34721 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
- CVE-2020-3569 Cisco IOS XR Software DVMRP Memory Exhaustion
- CVE-2020-3566 Cisco IOS XR Software DVMRP Memory Exhaustion
- CVE-2010-3035 Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service
- CVE-2022-20821 Cisco IOS XR Open Port
Sources
Also known as GHSA-9r24-f9qq-w8p5.