Junos OS: MX Series: An MPC10 Denial of Service (DoS) due to OSPF states transitioning to Down, causes traffic to stop forwarding through the device.

Description

This issue only affects devices with three (3) or more MPC10's installed in a single chassis with OSPF enabled and configured on the device. An Insufficient Resource Pool weakness allows an attacker to cause the device's Open Shortest Path First (OSPF) states to transition to Down, resulting in a Denial of Service (DoS) attack. This attack requires a relatively large number of specific Internet Mixed (IMIXed) types of genuine and valid IPv6 packets to be transferred by the attacker in a relatively short period of time, across three or more PFE's on the device at the same time. Continued receipt of the traffic sent by the attacker will continue to cause OSPF to remain in the Down starting state, or flap between other states and then again to Down, causing a persistent Denial of Service. This attack will affect all IPv4, and IPv6 traffic served by the OSPF routes once the OSPF states transition to Down. This issue affects: Juniper Networks Junos OS on MX480, MX960, MX2008, MX2010, MX2020: 18.1 versions prior to 18.1R2-S4, 18.1R3-S5; 18.1X75 version 18.1X75-D10 and later versions; 18.2 versions prior to 18.2R1-S5, 18.2R2-S3, 18.2R3; 18.2X75 versions prior to 18.2X75-D50; 18.3 versions prior to 18.3R1-S4, 18.3R2, 18.3R3; 18.4 versions prior to 18.4R1-S2, 18.4R2.

Scores

EPSS (exploitation in 30 days)

1.3% · top 29% 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

• CWE-410 Insufficient Resource Pool (opens in a new tab)All about CWE-410 and its CVEs

Affected products

• Juniper Networks · Junos OS

  • affected 18.1 – < 18.1R2-S4, 18.1R3-S5
  • affected 18.2 – < 18.2R1-S5, 18.2R2-S3, 18.2R3
  • affected 18.2X75 – < 18.2X75-D50
  • affected 18.3 – < 18.3R1-S4, 18.3R2, 18.3R3
  • affected 18.4 – < 18.4R1-S2, 18.4R2
  • affected 18.1X75-D10 – < 18.1X75*

What to do

Solution: The following software releases have been updated to resolve this specific issue: 18.1R2-S4, 18.1R3-S5, 18.2R1-S5, 18.2R2-S3, 18.2R3, 18.2X75-D50, 18.3R1-S4, 18.3R2, 18.3R3, 18.4R1-S2, 18.4R2, 19.1R1, and all subsequent releases.

Workaround: There are no known workarounds for this issue.

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

References (1)

• https://kb.juniper.net/JSA10954 (opens in a new tab)x_refsource_MISCx_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-2019-0056](https://trackcve.app/badge/CVE-2019-0056.svg)](https://trackcve.app/cve/CVE-2019-0056)

Record last updated 16 Sept 2024, 18:29 UTC.