CVE-2023-22412

Junos OS: MX Series and SRX Series: The flow processing daemon (flowd) will crash if the SIP ALG is enabled and specific SIP messages are processed

Description

An Improper Locking vulnerability in the SIP ALG of Juniper Networks Junos OS on MX Series with MS-MPC or MS-MIC card and SRX Series allows an unauthenticated, network-based attacker to cause a flow processing daemon (flowd) crash and thereby a Denial of Service (DoS). Continued receipt of these specific packets will cause a sustained Denial of Service condition. This issue occurs when SIP ALG is enabled and specific SIP messages are processed simultaneously. This issue affects: Juniper Networks Junos OS on MX Series and SRX Series 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; 21.4 versions prior to 21.4R3; 22.1 versions prior to 22.1R2. This issue does not affect Juniper Networks Junos OS versions prior to 20.4R1 on MX Series, or SRX Series.

Remediation

Solution:

  • The following software releases have been updated to resolve this specific issue: 20.4R3-S4, 21.1R3-S3, 21.2R3-S2, 21.3R3, 21.4R3, 22.1R2, 22.2R1, and all subsequent releases.

Workaround:

  • There are no known workarounds for this issue, but it should be considered to disable the SIP ALG if it's not strictly needed.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.14%
Vendor Advisory juniper.net
Affected: Juniper Networks Junos OS
Published at:
Updated at:

References

Link Tags
https://kb.juniper.net/JSA70208 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-22412?
CVE-2023-22412 has been scored as a high severity vulnerability.
How to fix CVE-2023-22412?
To fix CVE-2023-22412: The following software releases have been updated to resolve this specific issue: 20.4R3-S4, 21.1R3-S3, 21.2R3-S2, 21.3R3, 21.4R3, 22.1R2, 22.2R1, and all subsequent releases.
Is CVE-2023-22412 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-22412 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-22412?
CVE-2023-22412 affects Juniper Networks Junos OS.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.