An Out-of-bounds Write vulnerability in the Internet Key Exchange Protocol daemon (iked) of Juniper Networks Junos OS on SRX series and MX with SPC3 allows an authenticated, network-based attacker to cause a Denial of Service (DoS).
 

iked will crash and restart, and the tunnel will not come up when a peer sends a specifically formatted payload during the negotiation. This will impact other IKE negotiations happening at the same time. Continued receipt of this specifically formatted payload will lead to continuous crashing of iked and thereby the inability for any IKE negotiations to take place.

Note that this payload is only processed after the authentication has successfully completed. So the issue can only be exploited by an attacker who can successfully authenticate.
 

This issue affects Juniper Networks Junos OS on SRX Series, and MX Series with SPC3:

• All versions prior to 19.3R3-S7;
• 19.4 versions prior to 19.4R3-S9;
• 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 21.1R3-S3;
• 21.2 versions prior to 21.2R3-S2;
• 21.3 versions prior to 21.3R3-S1;
• 21.4 versions prior to 21.4R2-S1, 21.4R3;
• 22.1 versions prior to 22.1R1-S2, 22.1R2.

To be affected by this issue IPsec VPN configuration needs to present similar to the following example:

and the system needs to run iked (vs. kmd which is not affected), which can be verified with:

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-2023-22404.

The following software releases have been updated to resolve this specific issue: 19.3R3-S7, 19.4R3-S9, 20.2R3-S5, 20.3R3-S5, 20.4R3-S4, 21.1R3-S3, 21.2R3-S2, 21.3R3-S1, 21.4R2-S1, 21.4R3, 22.1R1-S2, 22.1R2, 22.2R1, and all subsequent releases.

This issue is being tracked as 1665150.

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

• 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-2023-22404 at cve.mitre.org