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CVE-2023-20046

HIGHCVSS 8.8/10EPSS 0.86%

Last modified

CVE-2023-20046 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A vulnerability in the key-based SSH authentication feature of Cisco StarOS Software could allow an authenticated, remote attacker to elevate privileges on an affected device. This vulnerability is due to insufficient validation of user-supplied credentials. An attacker could exploit this vulnerability by sending a valid low-privileged SSH key to an affected device from a host that has an IP address that is configured as the source for a high-privileged user account. EPSS estimates a 0.86% chance of exploitation in the next 30 days.

Description

A vulnerability in the key-based SSH authentication feature of Cisco StarOS Software could allow an authenticated, remote attacker to elevate privileges on an affected device. This vulnerability is due to insufficient validation of user-supplied credentials. An attacker could exploit this vulnerability by sending a valid low-privileged SSH key to an affected device from a host that has an IP address that is configured as the source for a high-privileged user account. A successful exploit could allow the attacker to log in to the affected device through SSH as a high-privileged user. There are workarounds that address this vulnerability.

Metrics

CVSS 3.1
8.8/10

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

EPSS Probability
0.86%

53.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoStaros< 21.22.14
CiscoStaros>= 21.23.0, < 21.23.31
CiscoStaros>= 21.25.0, < 21.25.15
CiscoStaros>= 21.26.0, < 21.26.17
CiscoStaros>= 21.27.0, < 21.27.6
CiscoStaros>= 21.28.0, < 21.28.3
CiscoStaros21.23.n
CiscoStaros21.24
CiscoStaros21.27.m
CiscoStaros21.28.m

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2023-20046?
A vulnerability in the key-based SSH authentication feature of Cisco StarOS Software could allow an authenticated, remote attacker to elevate privileges on an affected device. This vulnerability is due to insufficient validation of user-supplied credentials. An attacker could exploit this vulnerability by sending a valid low-privileged SSH key to an affected device from a host that has an IP address that is configured as the source for a high-privileged user account. A successful exploit could allow the attacker to log in to the affected device through SSH as a high-privileged user. There are workarounds that address this vulnerability.
How severe is CVE-2023-20046?
CVE-2023-20046 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.86% probability of exploitation in the next 30 days.
How do I fix CVE-2023-20046?
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.

Are you affected by CVE-2023-20046?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST