An Improper Locking vulnerability in the SIP ALG of Juniper Networks Junos OS on MX Series and SRX Series allows an unauthenticated networked attacker to cause a flowprocessing 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 can occur in a scenario where the SIP ALG is enabled and specific SIP messages are being processed simultaneously. This issue affects: Juniper Networks Junos OS on MX Series and SRX Series 20.4 versions prior to 20.4R3-S1; 21.1 versions prior to 21.1R2-S2, 21.1R3; 21.2 versions prior to 21.2R1-S2, 21.2R2; 21.3 versions prior to 21.3R1-S1, 21.3R2. This issue does not affect Juniper Networks Junos OS versions prior to 20.4R1.
Published 2022-01-19 01:15:09
Updated 2022-01-26 18:38:41
View at NVD,   CVE.org
Vulnerability category: Denial of service

Products affected by CVE-2022-22175

Exploit prediction scoring system (EPSS) score for CVE-2022-22175

0.10%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 43 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2022-22175

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.3
MEDIUM AV:N/AC:M/Au:N/C:N/I:N/A:P
8.6
2.9
NIST
7.5
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.9
3.6
NIST
7.5
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.9
3.6
Juniper Networks, Inc.

CWE ids for CVE-2022-22175

  • The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.
    Assigned by: sirt@juniper.net (Primary)

References for CVE-2022-22175

  • https://kb.juniper.net/JSA11281
    2022-01 Security Bulletin: MX Series and SRX Series: The flowd daemon will crash if the SIP ALG is enabled and specific SIP messages are processed (CVE-2022-22175) - Juniper Networks
    Vendor Advisory
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