An Improper Validation of Syntactic Correctness of Input vulnerability in the kernel of Juniper Networks Junos OS Evolved on PTX series allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).

When an incoming TCP packet destined to the device is malformed there is a possibility of a kernel panic. Only TCP packets destined to the ports for BGP, LDP and MSDP can trigger this.

This issue only affects PTX10004, PTX10008, PTX10016. No other PTX Series devices or other platforms are affected.

This issue affects Juniper Networks Junos OS Evolved:

• 20.4-EVO versions prior to 20.4R3-S4-EVO;
• 21.3-EVO versions prior to 21.3R3-EVO;
• 21.4-EVO versions prior to 21.4R3-EVO;
• 22.1-EVO versions prior to 22.1R2-EVO.

This issue does not affect Juniper Networks Junos OS Evolved versions prior to 20.4R1-EVO.

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was seen during production usage.

This issue has been assigned CVE-2022-22192.

The following Junos OS Evolved software releases have been updated to resolve this specific issue: 20.4R3-S4-EVO, 21.4R3-EVO, 22.1R2-EVO, 22.2R1-EVO, and all subsequent releases.

This issue is being tracked as 1663201 which is visible on the Customer Support website..

Note: Juniper SIRT's policy [juniper.net] is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).

IMPLEMENTATION:

Software Releases, patches and updates are available at https://support.juniper.net/support/downloads/.

There are no known workarounds for this issue.

• KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process [juniper.net]
• KB16765: In which releases are vulnerabilities fixed? [juniper.net]
• KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories [juniper.net]
• Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team