CVE-2020-3473: Cisco IOS XR Software Authenticated User Privilege Escalation Vulnerability
First published: Fri Sep 04 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.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XR | >=5.0.0<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 | >=5.0.0<6.6.3 | |
| Cisco IOS XR | >=7.0.0<7.0.2 | |
| Cisco IOS XR | >=7.1.0<7.1.1 | |
| Cisco Ios Xrv 9000 | ||
| Cisco Ncs 540 | ||
| Cisco Ncs 5501 | ||
| Cisco Ncs 5501-se | ||
| Cisco Ncs 5502 | ||
| Cisco Ncs 5502-se | ||
| Cisco Ncs 5508 | ||
| Cisco Ncs 5516 | ||
| Cisco Ncs 560 | ||
| Cisco Ncs 6000 | ||
| Cisco Ncs 6008 | ||
| Cisco IOS XR | >=5.0.0<6.5.29 | |
| Cisco Ncs 4009 | ||
| Cisco Ncs 4016 |
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Reference Links
Frequently Asked Questions
What is CVE-2020-3473?
CVE-2020-3473 is a vulnerability in Cisco IOS XR Software that could allow an authenticated, local CLI shell user to elevate privileges and gain administrative control of the device.
How does CVE-2020-3473 affect Cisco devices?
CVE-2020-3473 affects Cisco devices running Cisco IOS XR Software versions 5.0.0 to 7.0.12 and versions 7.1.0 to 7.2.1.
What is the severity of CVE-2020-3473?
CVE-2020-3473 has a severity rating of 7.8 (High).
How can I fix CVE-2020-3473?
To fix CVE-2020-3473, Cisco IOS XR Software users should upgrade to a fixed software release as indicated in the Cisco Security Advisory.
Where can I find more information about CVE-2020-3473?
More information about CVE-2020-3473 can be found in the Cisco Security Advisory available at the provided reference link.
- collector/nvd-index
- agent/weakness
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/severity
- agent/title
- agent/author
- agent/references
- agent/tags
- agent/description
- agent/event
- agent/first-publish-date
- vendor/cisco
- canonical/cisco ios xr
- version/cisco ios xr/5.0.0
- version/cisco ios xr/7.1.0
- canonical/cisco 8201
- canonical/cisco 8202
- canonical/cisco 8808
- canonical/cisco 8812
- canonical/cisco 8818
- version/cisco ios xr/7.0.0
- canonical/cisco ios xrv 9000
- canonical/cisco ncs 540
- canonical/cisco ncs 5501
- canonical/cisco ncs 5501-se
- canonical/cisco ncs 5502
- canonical/cisco ncs 5502-se
- canonical/cisco ncs 5508
- canonical/cisco ncs 5516
- canonical/cisco ncs 560
- canonical/cisco ncs 6000
- canonical/cisco ncs 6008
- canonical/cisco ncs 4009
- canonical/cisco ncs 4016