Junos OS and Junos OS Evolved: RPD crash when processing a specific BGP packet

Description

On Juniper Networks Junos OS and Junos OS Evolved devices, processing a specific BGP packet can lead to a routing process daemon (RPD) crash and restart. This issue can occur even before the BGP session with the peer is established. Repeated receipt of this specific BGP packet can result in an extended Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 18.2X75 versions starting from 18.2X75-D50.8, 18.2X75-D60 and later versions, prior to 18.2X75-D52.8, 18.2X75-D53, 18.2X75-D60.2, 18.2X75-D65.1, 18.2X75-D70; 19.4 versions 19.4R1 and 19.4R1-S1; 20.1 versions prior to 20.1R1-S2, 20.1R2. Juniper Networks Junos OS Evolved: 19.4-EVO versions prior to 19.4R2-S2-EVO; 20.1-EVO versions prior to 20.1R2-EVO. This issue does not affect: Juniper Networks Junos OS releases prior to 19.4R1. Juniper Networks Junos OS Evolved releases prior to 19.4R1-EVO.

Scores

EPSS (exploitation in 30 days)

1.3% · top 30% 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-159 Failure to Sanitize Special Element (opens in a new tab)All about CWE-159 and its CVEs
• CWE-690 Unchecked Return Value to NULL Pointer Dereference (opens in a new tab)All about CWE-690 and its CVEs

Affected products

• Juniper Networks · Junos OS

  • affected 18.2X75-D50.8 18.2X75-D60 – < 18.2X75*
  • unaffected 19.4 – < 19.4R1
  • affected 20.1 – < 20.1R1-S2, 20.1R2

• Juniper Networks · Junos OS Evolved

  • unaffected 19.4-EVO – < 19.4R1-EVO
  • affected 20.1-EVO – < 20.1R2-EVO

What to do

Solution: The following software releases have been updated to resolve this specific issue: Junos OS: 18.2X75-D52.8, 18.2X75-D53, 18.2X75-D60.2, 18.2X75-D65.1, 18.2X75-D70, 19.4R1-S2, 19.4R2, 20.1R1-S2, 20.1R2, 20.2R1, and all subsequent releases. Junos OS Evolved: 19.4R2-S2-EVO, 20.1R2-EVO, 20.2R1-EVO and all subsequent releases.

Workaround: There are no viable workarounds for this issue.

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

References (1)

• https://kb.juniper.net/JSA11035 (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-2020-1648](https://trackcve.app/badge/CVE-2020-1648.svg)](https://trackcve.app/cve/CVE-2020-1648)

Record last updated 16 Sept 2024, 19:40 UTC.