CVE-2021-1370: Cisco IOS XR Software for Cisco 8000 Series Routers and Network Convergence System 540 Series Routers Privilege Escalation Vulnerability
First published: Thu Feb 04 2021(Updated: )
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.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XR | <7.0.12 | |
| Cisco IOS XR | >=7.1.0<7.2.1 | |
| Cisco 8201 | ||
| Cisco 8202 | ||
| Cisco 8808 | ||
| Cisco 8812 | ||
| Cisco 8818 | ||
| Cisco IOS XR | <7.2.1 | |
| Cisco Ncs 540 |
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Reference Links
Frequently Asked Questions
What is CVE-2021-1370?
CVE-2021-1370 is 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.
How does CVE-2021-1370 allow an attacker to elevate their privilege?
CVE-2021-1370 allows an authenticated, local attacker to elevate their privilege to root.
Which software versions are affected by CVE-2021-1370?
Cisco IOS XR Software versions up to 7.0.12 and versions between 7.1.0 and 7.2.1 are affected by CVE-2021-1370.
What is the severity of CVE-2021-1370?
CVE-2021-1370 has a severity score of 7.8 (high).
How can I fix CVE-2021-1370?
To fix CVE-2021-1370, update Cisco IOS XR Software to a version beyond 7.2.1.
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- canonical/cisco 8201
- canonical/cisco 8202
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- canonical/cisco 8818
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