CWE
754
Advisory Published
Updated

CVE-2022-22227: Junos OS Evolved: ACX7000 Series: Specific IPv6 transit traffic gets exceptioned to the routing-engine which causes increased CPU utilization

First published: Tue Oct 18 2022(Updated: )

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved on ACX7000 Series allows an unauthenticated network-based attacker to cause a partial Denial of Service (DoS). On receipt of specific IPv6 transit traffic, Junos OS Evolved on ACX7100-48L, ACX7100-32C and ACX7509 sends this traffic to the Routing Engine (RE) instead of forwarding it, leading to increased CPU utilization of the RE and a partial DoS. This issue only affects systems configured with IPv6. This issue does not affect ACX7024 which is supported from 22.3R1-EVO onwards where the fix has already been incorporated as indicated in the solution section. This issue affects Juniper Networks Junos OS Evolved on ACX7100-48L, ACX7100-32C, ACX7509: 21.1-EVO versions prior to 21.1R3-S2-EVO; 21.2-EVO versions prior to 21.2R3-S2-EVO; 21.3-EVO versions prior to 21.3R3-EVO; 21.4-EVO versions prior to 21.4R1-S1-EVO, 21.4R2-EVO. This issue does not affect Juniper Networks Junos OS Evolved versions prior to 21.1R1-EVO.

Credit: sirt@juniper.net

Affected SoftwareAffected VersionHow to fix
Juniper Junos Os Evolved=21.1
Juniper Junos Os Evolved=21.1-r1
Juniper Junos Os Evolved=21.1-r1-s1
Juniper Junos Os Evolved=21.1-r2
Juniper Junos Os Evolved=21.1-r3
Juniper Junos Os Evolved=21.1-r3-s1
Juniper Junos Os Evolved=21.2
Juniper Junos Os Evolved=21.2-r1
Juniper Junos Os Evolved=21.2-r1-s1
Juniper Junos Os Evolved=21.2-r1-s2
Juniper Junos Os Evolved=21.2-r2
Juniper Junos Os Evolved=21.2-r2-s1
Juniper Junos Os Evolved=21.2-r2-s2
Juniper Junos Os Evolved=21.2-r3
Juniper Junos Os Evolved=21.2-r3-s1
Juniper Junos Os Evolved=21.3
Juniper Junos Os Evolved=21.3-r1
Juniper Junos Os Evolved=21.3-r1-s1
Juniper Junos Os Evolved=21.3-r2
Juniper Junos Os Evolved=21.3-r2-s1
Juniper Junos Os Evolved=21.3-r2-s2
Juniper Junos Os Evolved=21.4
Juniper Junos Os Evolved=21.4-r1
Juniper Acx7100-32c
Juniper Acx7100-48l
Juniper Acx7509

Remedy

The following software releases have been updated to resolve this specific issue: 21.1R3-S2-EVO, 21.2R3-S2-EVO, 21.3R3-EVO, 21.4R1-S1-EVO, 21.4R2-EVO, 22.1R1-EVO, and all subsequent releases.

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Frequently Asked Questions

  • What is CVE-2022-22227?

    CVE-2022-22227 refers to an Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved on ACX7000 Series.

  • How does CVE-2022-22227 impact Juniper Junos OS Evolved?

    CVE-2022-22227 can allow an unauthenticated network-based attacker to cause a partial Denial of Service (DoS) on devices running Juniper Junos OS Evolved on ACX7000 Series.

  • What is the severity of CVE-2022-22227?

    CVE-2022-22227 has a severity rating of 5.3, which is considered medium.

  • Is Juniper Junos OS Evolved version 21.1 affected by CVE-2022-22227?

    Yes, Juniper Junos OS Evolved version 21.1 is affected by CVE-2022-22227.

  • How can I mitigate CVE-2022-22227 on Juniper Junos OS Evolved?

    To mitigate CVE-2022-22227 on Juniper Junos OS Evolved, it is recommended to update to a fixed version provided by Juniper Networks.

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