Junos OS: QFX10000 Series, PTX1000 Series: The dcpfe process will crash when a malformed ethernet frame is received

Description

An Improper Handling of Missing Values vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker to cause a dcpfe process core and thereby a Denial of Service (DoS). Continued receipt of these specific frames will cause a sustained Denial of Service condition. This issue occurs when a specific malformed ethernet frame is received. This issue affects Juniper Networks Junos OS on QFX10000 Series, PTX1000 Series Series: All versions prior to 19.4R3-S10; 20.1 version 20.1R1 and later versions; 20.2 versions prior to 20.2R3-S6; 20.3 versions prior to 20.3R3-S6; 20.4 versions prior to 20.4R3-S5; 21.1 versions prior to 21.1R3-S4; 21.2 versions prior to 21.2R3-S3; 21.3 versions prior to 21.3R3-S3; 21.4 versions prior to 21.4R3-S1; 22.1 versions prior to 22.1R2-S1, 22.1R3; 22.2 versions prior to 22.2R1-S2, 22.2R2.

Scores

EPSS (exploitation in 30 days)

0.32% · top 75% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.

Weakness

• CWE-230 Improper Handling of Missing Values (opens in a new tab)All about CWE-230 and its CVEs
• Denial of Service (DoS)

Affected products

• Juniper Networks · Junos OS

  • affected unspecified – < 19.4R3-S10
  • affected 20.1R1 – < 20.1*
  • affected 20.2 – < 20.2R3-S6
  • affected 20.3 – < 20.3R3-S6
  • affected 20.4 – < 20.4R3-S5
  • affected 21.1 – < 21.1R3-S4
  • affected 21.2 – < 21.2R3-S3
  • affected 21.3 – < 21.3R3-S3
  • affected 21.4 – < 21.4R3-S1
  • affected 22.1 – < 22.1R2-S1, 22.1R3
  • affected 22.2 – < 22.2R1-S2, 22.2R2

What to do

Solution: The following software releases have been updated to resolve this specific issue: 19.4R3-S10, 20.2R3-S6, 20.3R3-S6, 20.4R3-S5, 21.1R3-S4, 21.2R3-S3, 21.3R3-S3, 21.4R3-S1, 22.1R2-S1, 22.1R3, 22.2R1-S2, 22.2R2, 22.3R1, 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://supportportal.juniper.net/JSA70612 (opens in a new tab)x_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-2023-1697](https://trackcve.app/badge/CVE-2023-1697.svg)](https://trackcve.app/cve/CVE-2023-1697)

Record last updated 6 Feb 2025, 15:59 UTC.