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CVE-2020-3473

HIGHCVSS 7.8/10EPSS 0.38%

Last modified

CVE-2020-3473 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.38% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.38%

30.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIos Xr>= 5.0.0, < 7.0.12
CiscoIos Xr>= 7.1.0, < 7.2.1
CiscoIos Xr>= 5.0.0, < 6.6.3
CiscoIos Xr>= 7.0.0, < 7.0.2
CiscoIos Xr>= 7.1.0, < 7.1.1
CiscoIos Xr>= 5.0.0, < 6.5.29

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-3473?
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&ndash;based checks. A successful exploit could allow the attacker to elevate privileges and perform actions on the device without authorization checks.
How severe is CVE-2020-3473?
CVE-2020-3473 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.38% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3473?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST