high
7.5
Advisory Published
Updated

CVE-2022-22159: Junos OS: An attacker sending crafted packets can cause a traffic and CPU Denial of Service (DoS).

First published: Wed Jan 19 2022(Updated: )

A vulnerability in the NETISR network queue functionality of Juniper Networks Junos OS kernel allows an attacker to cause a Denial of Service (DoS) by sending crafted genuine packets to a device. During an attack, the routing protocol daemon (rpd) CPU may reach 100% utilization, yet FPC CPUs forwarding traffic will operate normally. This attack occurs when the attackers' packets are sent over an IPv4 unicast routing equal-cost multi-path (ECMP) unilist selection. Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. An indicator of compromise may be to monitor NETISR drops in the network with the assistance of JTAC. Please contact JTAC for technical support for further guidance. This issue affects: Juniper Networks Junos OS 17.3 version 17.3R3-S9 and later versions prior to 17.3R3-S12; 17.4 version 17.4R3-S3 and later versions prior to 17.4R3-S5; 18.1 version 18.1R3-S11 and later versions prior to 18.1R3-S13; 18.2 version 18.2R3-S6 and later versions; 18.3 version 18.3R3-S4 and later versions prior to 18.3R3-S5; 18.4 version 18.4R3-S5 and later versions prior to 18.4R3-S9; 19.1 version 19.1R3-S3 and later versions prior to 19.1R3-S7. This issue does not affect Juniper Networks Junos OS versions prior to 17.3R3-S9. This issue does not affect Juniper Networks Junos OS Evolved.

Credit: sirt@juniper.net

Affected SoftwareAffected VersionHow to fix
Juniper Junos=17.3-r3-s10
Juniper Junos=17.3-r3-s11
Juniper Junos=17.3-r3-s9
Juniper Junos=17.4-r3-s3
Juniper Junos=17.4-r3-s4
Juniper Junos=18.1-r3-s11
Juniper Junos=18.1-r3-s12
Juniper Junos=18.2-r3-s6
Juniper Junos=18.2-r3-s7
Juniper Junos=18.2-r3-s8
Juniper Junos=18.3-r3-s4
Juniper Junos=18.4-r3-s5
Juniper Junos=18.4-r3-s6
Juniper Junos=18.4-r3-s7
Juniper Junos=18.4-r3-s8
Juniper Junos=19.1-r3-s3
Juniper Junos=19.1-r3-s4
Juniper Junos=19.1-r3-s5
Juniper Junos=19.1-r3-s6

Remedy

The following software releases have been updated to resolve this specific issue: 17.3R3-S12, 17.4R3-S5, 18.1R3-S13, 18.3R3-S5, 18.4R3-S9, 19.1R3-S7, and all subsequent releases.

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2022-22159?

    CVE-2022-22159 is classified as a high severity vulnerability due to its potential to cause Denial of Service.

  • How do I fix CVE-2022-22159?

    To mitigate CVE-2022-22159, upgrade to a patched version of Junos OS as recommended by Juniper Networks.

  • What kind of attack does CVE-2022-22159 enable?

    CVE-2022-22159 enables attackers to conduct Denial of Service (DoS) attacks by sending crafted packets.

  • Which versions of Junos OS are affected by CVE-2022-22159?

    CVE-2022-22159 affects Junos OS versions 17.3, 17.4, 18.1, 18.2, 18.3, 18.4, and 19.1.

  • How can CVE-2022-22159 impact system performance?

    During an attack leveraging CVE-2022-22159, the routing protocol daemon (rpd) can reach 100% CPU utilization, severely affecting system performance.

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