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

Description

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.

Scores

EPSS (exploitation in 30 days)

0.99% · top 37% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

• Denial of Service (DoS)

Affected products

• Juniper Networks · Junos OS

  • unaffected unspecified – < 17.3R3-S9
  • affected 17.3R3-S9 – < 17.3*
  • affected 17.4R3-S3 – < 17.4*
  • affected 18.1R3-S11 – < 18.1*
  • affected 18.2R3-S6 – < 18.2*
  • affected 18.3R3-S4 – < 18.3*
  • affected 18.4R3-S5 – < 18.4*
  • affected 19.1R3-S3 – < 19.1*

• Juniper Networks · Junos OS Evolved

  • unaffected Any

What to do

Solution: 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.

Workaround: There are no available workarounds for this issue.

Exploitation: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

References (1)

• https://kb.juniper.net/JSA11267 (opens in a new tab)x_refsource_CONFIRMx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2022-22159](https://trackcve.app/badge/CVE-2022-22159.svg)](https://trackcve.app/cve/CVE-2022-22159)

Record last updated 16 Sept 2024, 20:37 UTC.