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AUSCERT External Security Bulletin Redistribution
Junos OS Evolved: Kernel processing of unvalidated TCP segments could lead
to a Denial of Service (DoS) (CVE-2022-22247)
8 November 2022
AusCERT Security Bulletin Summary
Product: Junos OS Evolved
Publisher: Juniper Networks
Operating System: Juniper
CVE Names: CVE-2022-22247
Comment: CVSS (Max): 7.5 CVE-2022-22247 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVSS Source: NVD
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Article ID: JSA69904
Product Affected: This issue affects Junos OS Evolved 21.3-EVO, 21.4-EVO,
Severity Level: High
CVSS Score: 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
An Improper Input Validation vulnerability in ingress TCP segment processing of
Juniper Networks Junos OS Evolved allows a network-based unauthenticated
attacker to send a crafted TCP segment to the device, triggering a kernel
panic, leading to a Denial of Service (DoS) condition. Continued receipt and
processing of this TCP segment could create a sustained Denial of Service (DoS)
This issue affects Juniper Networks Junos OS Evolved:
21.3 versions prior to 21.3R3-EVO;
21.4 versions prior to 21.4R2-EVO;
22.1 versions prior to 22.1R2-EVO.
This issue does not affect Juniper Networks Junos OS Evolved versions prior to
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was found during internal product security testing or research.
This issue has been assigned CVE-2022-22247.
The following software releases have been updated to resolve this specific
issue: Junos OS Evolved 21.3R3-EVO, 21.4R2-EVO, 22.1R2-EVO, 22.2R1-EVO, and all
This issue is being tracked as 1643328 and 1634134 which are visible on the
Customer Support website.
Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of
Engineering (EOE) or End of Life (EOL).
Software Releases, patches and updates are available at
There are no viable workarounds for this issue.
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common
Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."
2022-10-12: Initial Publication.
KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin
KB16765: In which releases are vulnerabilities fixed?
KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security
Report a Security Vulnerability - How to Contact the Juniper Networks
Security Incident Response Team
CVE-2022-22247 at cve.mitre.org
Last Updated: 2022-10-12
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