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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
Resolution:        Patch/Upgrade
CVE Names:         CVE-2022-22247  

Original Bulletin: 

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
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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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 
subsequent releases.

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.

Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common 
Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

Modification History:

2022-10-12: Initial Publication.

Related Information:

    KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin 
Publication Process
    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
Created:      2022-10-12

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