Junos OS: Upon receipt of certain types of malformed PCEP packets the pccd process may crash.

Description

Certain types of malformed Path Computation Element Protocol (PCEP) packets when received and processed by a Juniper Networks Junos OS device serving as a Path Computation Client (PCC) in a PCEP environment using Juniper's path computational element protocol daemon (pccd) process allows an attacker to cause the pccd process to crash and generate a core file thereby causing a Denial of Service (DoS). Continued receipt of this family of malformed PCEP packets will cause an extended Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 15.1 versions prior to 15.1F6-S13, 15.1R7-S4; 15.1X49 versions prior to 15.1X49-D180 on SRX Series; 15.1X53 versions prior to 15.1X53-D238, 15.1X53-D496, 15.1X53-D592; 16.1 versions prior to 16.1R7-S4; 16.2 versions prior to 16.2R2-S9; 17.1 versions prior to 17.1R2-S11, 17.1R3; 17.2 versions prior to 17.2R1-S9; 17.2 version 17.2R2 and later prior to 17.2R3-S2; 17.3 versions prior to 17.3R3-S3; 17.4 versions prior to 17.4R2-S2, 17.4R3; 18.1 versions prior to 18.1R3-S2; 18.2 versions prior to 18.2R2-S6, 18.2R3; 18.2X75 versions prior to 18.2X75-D40; 18.3 versions prior to 18.3R2; 18.4 versions prior to 18.4R1-S2, 18.4R2. This issue does not affect releases of Junos OS prior to 15.1R1.

Scores

EPSS (exploitation in 30 days)

1.1% · top 35% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.

Weakness

• Denial of Service (DoS)
• 253 - Incorrect Check of Function Return Value

Affected products

• Juniper Networks · Junos OS

  • affected 15.1 – < 15.1F6-S13, 15.1R7-S4
  • affected 16.1 – < 16.1R7-S4
  • affected 16.2 – < 16.2R2-S9
  • affected 17.1 – < 17.1R2-S11, 17.1R3
  • affected 17.2 – < 17.2R1-S9, 17.2R3-S2
  • affected 17.3 – < 17.3R3-S3
  • affected 17.4 – < 17.4R2-S2, 17.4R3
  • affected 18.1 – < 18.1R3-S2
  • affected 18.2 – < 18.2R3
  • affected 18.2X75 – < 18.2X75-D40
  • affected 18.3 – < 18.2R2-S6, 18.3R2
  • affected 18.4 – < 18.4R1-S2, 18.4R2
  • affected 15.1X53 – < 15.1X53-D238, 15.1X53-D496, 15.1X53-D592

• Juniper Networks · Junos OS

  • affected 15.1X49 – < 15.1X49-D180

What to do

Solution: The following software releases have been updated to resolve this specific issue: 15.1F6-S13, 15.1R7-S4, 15.1X49-D180, 15.1X53-D238, 15.1X53-D496, 15.1X53-D592, 16.1R7-S4, 16.2R2-S9, 17.1R2-S11, 17.1R3, 17.2R1-S9, 17.2R3-S2, 17.3R3-S3, 17.4R2-S2, 17.4R2-S4, 17.4R3, 18.1R3-S2, 18.2R2-S6, 18.2R3, 18.2X75-D40, 18.3R2, 18.4R1-S2, 18.4R2, 19.1R1, 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 (2)

• https://prsearch.juniper.net/InfoCenter/index?page=prcontent&id=PR1395205 (opens in a new tab)x_refsource_MISCx_transferred
• https://kb.juniper.net/JSA10980 (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-2020-1601](https://trackcve.app/badge/CVE-2020-1601.svg)](https://trackcve.app/cve/CVE-2020-1601)

Record last updated 17 Sept 2024, 04:25 UTC.