A Missing Release of Memory after Effective Lifetime vulnerability in the Flow Processing Daemon (flowd) of Juniper Networks Junos OS allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).
 

In an IPsec VPN environment, a memory leak will be seen if a DH or ECDH group is configured. Eventually the flowd process will crash and restart.

This issue affects Juniper Networks Junos OS on vSRX Series:

• All versions prior to 19.3R3-S7;
• 19.4 versions prior to 19.4R2-S8, 19.4R3-S10;
• 20.2 versions prior to 20.2R3-S6;
• 20.3 versions prior to 20.3R3-S5;
• 20.4 versions prior to 20.4R3-S5;
• 21.1 versions prior to 21.1R3-S4;
• 21.2 versions prior to 21.2R3;
• 21.3 versions prior to 21.3R3;
• 21.4 versions prior to 21.4R2.

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

show system processes extensive | match "KMD|IKED"


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-2023-22417.

The following software releases have been updated to resolve this specific issue: 19.3R3-S7, 19.4R2-S8, 19.4R3-S10, 20.2R3-S6, 20.3R3-S5, 20.4R3-S5, 21.1R3-S4, 21.2R3, 21.3R3, 21.4R2, 22.1R1, and all subsequent releases.

This issue is being tracked as 1639998.

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​​​
2023-01-25: Update the JSA to state that no all SRX Series device are affected but only vSRX Series running iked

• 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-2023-22417 at cve.mitre.org