CVE-2022-22164

Junos OS Evolved: Telnet service may be enabled when it is expected to be disabled.

Description

An Improper Initialization vulnerability in Juniper Networks Junos OS Evolved may cause a commit operation for disabling the telnet service to not take effect as expected, resulting in the telnet service staying enabled. When it is not intended to be operating on the device, an administrator can issue the following command to verify whether telnet is operating in the background: user@device > show system connections | grep :23 tcp 0 0 0.0.0.0:23 0.0.0.0:* LISTEN 20879/xinetd This issue affects: Juniper Networks Junos OS Evolved All versions prior to 20.4R2-S2-EVO; 21.1 version 21.1R1-EVO and later versions; 21.2 versions prior to 21.2R2-EVO.

Remediation

Solution:

  • The following software releases have been updated to resolve this specific issue: Junos OS Evolved: 20.4R2-S2-EVO, 21.2R2-EVO, 21.3R1-EVO and all subsequent releases.

Workaround:

  • To work around the issue, the xinetd service can be restarted manually using one of the commands below: user@device% systemctl restart xinetd or user@device% systemctl restart services-xinetd Additionally, loopback/firewall filters can be applied to disable remote access to the telnet service.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.31%
Vendor Advisory juniper.net
Affected: Juniper Networks Junos OS Evolved
Published at:
Updated at:

References

Link Tags
https://kb.juniper.net/JSA11272 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2022-22164?
CVE-2022-22164 has been scored as a medium severity vulnerability.
How to fix CVE-2022-22164?
To fix CVE-2022-22164: The following software releases have been updated to resolve this specific issue: Junos OS Evolved: 20.4R2-S2-EVO, 21.2R2-EVO, 21.3R1-EVO and all subsequent releases.
Is CVE-2022-22164 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-22164 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-2022-22164?
CVE-2022-22164 affects Juniper Networks Junos OS Evolved.
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