An Improper Check for Unusual or Exceptional Conditions vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).

When an incoming RESV message corresponding to a protected LSP is malformed it causes an incorrect internal state resulting in an rpd core.

This issue affects:

Juniper Networks Junos OS

• All versions prior to 19.2R3-S6;
• 19.3 versions prior to 19.3R3-S6;
• 19.4 versions prior to 19.4R3-S8;
• 20.1 versions prior to 20.1R3-S2;
• 20.2 versions prior to 20.2R3-S3;
• 20.3 versions prior to 20.3R3-S2;
• 20.4 versions prior to 20.4R3-S1;
• 21.1 versions prior to 21.1R3;
• 21.2 versions prior to 21.2R1-S2, 21.2R3;
• 21.3 versions prior to 21.3R2.

• All versions prior to 20.2R3-S3-EVO;
• 20.3-EVO version 20.3R1-EVO and later versions;
• 20.4-EVO versions prior to 20.4R3-S1-EVO;
• 21.1-EVO version 21.1R1-EVO and later versions;
• 21.2-EVO version 21.2R1-EVO and later versions;
• 21.3-EVO versions prior to 21.3R2-EVO.

To be affected by this issue the device must be configured with node protection for at least one LSP with either of:

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

This issue was found during internal product security testing or research.

This issue has been assigned CVE-2022-22238.

The following software releases have been updated to resolve this specific issue:

Junos OS: 19.4R3-S8, 20.1R3-S2, 20.2R3-S3, 20.3R3-S2, 20.4R3-S1, 21.1R3, 21.2R1-S2, 21.2R3, 21.3R2, 21.4R1, and all subsequent releases.

Junos OS Evolved: 20.2R3-S3-EVO, 20.4R3-S1-EVO, 21.3R2-EVO, 21.4R1-EVO, and all subsequent releases.

This issue is being tracked as PR 1560059 which is visible on the Customer Support website.

Note: Juniper SIRT's policy  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/.

• 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
• CVE-2022-22238 at cve.mitre.org