An Access of Uninitialized Pointer vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a locally authenticated attacker with low privileges to cause a Denial of Service (DoS).

When an MPLS ping is performed on BGP LSPs, the RPD might crash. Repeated execution of this operation will lead to a sustained DoS.

This issue affects:

Juniper Networks Junos OS:

• 15.1 versions prior to 15.1R7-S12;
• 19.1 versions prior to 19.1R3-S9;
• 19.2 versions prior to 19.2R1-S9, 19.2R3-S5;
• 19.3 versions prior to 19.3R3-S6;
• 19.4 versions prior to 19.4R2-S7, 19.4R3-S8;
• 20.1 versions prior to 20.1R3-S4;
• 20.2 versions prior to 20.2R3-S5;
• 20.3 versions prior to 20.3R3-S5;
• 20.4 versions prior to 20.4R3-S4;
• 21.1 versions prior to 21.1R1-S1, 21.1R2;

Juniper Networks Junos OS Evolved:

• All versions prior to 20.4R3-S4;
• 21.1 versions prior to 21.1R2-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-2023-22398.

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

Junos OS: 15.1R7-S12, 19.1R3-S9, 19.2R1-S9, 19.2R3-S5, 19.3R3-S6, 19.4R2-S7, 19.4R3-S8, 20.1R3-S4, 20.2R3-S5, 20.3R3-S5, 20.4R3-S4, 21.1R1-S1, 21.1R2, 21.2R1, and all subsequent releases.

Junos OS Evolved: 20.4R3-S4-EVO, 21.1R2-EVO, 21.2R1-EVO and all subsequent releases.
 

This issue is being tracked as 1593770.
 

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

There are no known workarounds for this issue.

To reduce the risk of exploitation of this issue, use access lists or firewall filters to limit access to only trusted networks, hosts and users.

• 2023-01-11: Initial Publication

• 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-2023-22398 at cve.mitre.org