cisco-sa-iosxr-LJtNFjeN: Cisco IOS XR Software Authenticated User Privilege Escalation Vulnerability
First published: Wed Sep 02 2020(Updated: )
A vulnerability in task group assignment for a specific CLI command in Cisco IOS XR Software could allow an authenticated, local CLI shell user to elevate privileges and gain full administrative control of the device. The vulnerability is due to incorrect mapping of a command to task groups within the source code. An attacker could exploit this vulnerability by first authenticating to the local CLI shell on the device and using the CLI command to bypass the task group-based checks. A successful exploit could allow the attacker to elevate privileges and perform actions on the device without authorization checks. Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-LJtNFjeN
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco platform | >=IOS XRv 9000 Router=IOS XR, SW only=Network Convergence System 540 Routers=Network Convergence System 560 Routers<=Network Convergence System 4000 Series<SMU ID for 6.5.29 - AA17787=8000 Series Routers<7.0.12, 7.2.1, and later | SMU ID for 6.5.29 - AA17787 7.0.12, 7.2.1, and later |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this Cisco IOS XR Software vulnerability?
The vulnerability ID for this Cisco IOS XR Software vulnerability is cisco-sa-iosxr-LJtNFjeN.
What is the severity of the Cisco IOS XR Software vulnerability?
The severity of the Cisco IOS XR Software vulnerability is high with a score of 7.8.
How can an authenticated, local CLI shell user exploit this vulnerability?
An authenticated, local CLI shell user can exploit this vulnerability to elevate privileges and gain full administrative control of the device.
Which Cisco IOS XR Software versions are affected by this vulnerability?
The affected versions of Cisco IOS XR Software are IOS XRv 9000 Router, IOS XR, SW only, Network Convergence System 540 Routers, Network Convergence System 560 Routers, Network Convergence System 4000 Series, and 8000 Series Routers.
How can I fix this Cisco IOS XR Software vulnerability?
To fix this Cisco IOS XR Software vulnerability, apply the SMU ID for 6.5.29 - AA17787 or update to version 7.0.12, 7.2.1, or later.
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- vendor/cisco
- canonical/cisco platform
- version/cisco platform/ios xrv 9000 router
- version/cisco platform/ios xr, sw only
- version/cisco platform/network convergence system 540 routers
- version/cisco platform/network convergence system 560 routers
- version/cisco platform/network convergence system 4000 series
- version/cisco platform/8000 series routers