CVE-2021-1572

ConfD CLI Secure Shell Server Privilege Escalation Vulnerability

Description

A vulnerability in ConfD could allow an authenticated, local attacker to execute arbitrary commands at the level of the account under which ConfD is running, which is commonly root. To exploit this vulnerability, an attacker must have a valid account on an affected device. The vulnerability exists because the affected software incorrectly runs the SFTP user service at the privilege level of the account that was running when the ConfD built-in Secure Shell (SSH) server for CLI was enabled. If the ConfD built-in SSH server was not enabled, the device is not affected by this vulnerability. An attacker with low-level privileges could exploit this vulnerability by authenticating to an affected device and issuing a series of commands at the SFTP interface. A successful exploit could allow the attacker to elevate privileges to the level of the account under which ConfD is running, which is commonly root. Note: Any user who can authenticate to the built-in SSH server may exploit this vulnerability. By default, all ConfD users have this access if the server is enabled. Software updates that address this vulnerability have been released.

Categories

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.08%
Vendor Advisory cisco.com Vendor Advisory cisco.com
Affected: Cisco Cisco ConfD
Published at:
Updated at:

References

Frequently Asked Questions

What is the severity of CVE-2021-1572?
CVE-2021-1572 has been scored as a high severity vulnerability.
How to fix CVE-2021-1572?
To fix CVE-2021-1572, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-1572 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-1572 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-1572?
CVE-2021-1572 affects Cisco Cisco ConfD.
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