Junos OS Evolved: CVSS (Max): 7.5

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2022.5673
Junos OS Evolved: Kernel processing of unvalidated TCP segments could lead
               to a Denial of Service (DoS) (CVE-2022-22247)
                              8 November 2022

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        AusCERT Security Bulletin Summary
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Product:           Junos OS Evolved
Publisher:         Juniper Networks
Operating System:  Juniper
Resolution:        Patch/Upgrade
CVE Names:         CVE-2022-22247  

Original Bulletin: 
   https://supportportal.juniper.net/s/article/2022-10-Security-Bulletin-Junos-OS-Evolved-Kernel-processing-of-unvalidated-TCP-segments-could-lead-to-a-Denial-of-Service-DoS-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
         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, 
22.1-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)

Problem:

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) 
condition.


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 
21.3R1-EVO.


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.

Solution:

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).

IMPLEMENTATION:

Software Releases, patches and updates are available at 
https://support.juniper.net/support/downloads/.

Workaround:
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 
Advisories
    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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