CVE-2023-1697

Adjacent denial of service via malformed Ethernet frames

Published Apr 17, 2023 · Updated Feb 6, 2025

Improper missing-value handling in Junos OS PFE on QFX10000 and PTX1000 devices allows attackers on the adjacent Ethernet segment to crash dcpfe. The PFE mishandles a missing value while parsing a specific malformed Ethernet frame, causing the dcpfe process to core. No authentication or user interaction is required; repeated delivery of the frame sustains the forwarding-plane service interruption.

CVSS severity6.5
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper missing-value handling in Junos OS PFE on QFX10000 and PTX1000 devices allows attackers on the adjacent Ethernet segment to crash dcpfe. The PFE mishandles a missing value while parsing a specific malformed Ethernet frame, causing the dcpfe process to core. No authentication or user interaction is required; repeated delivery of the frame sustains the forwarding-plane service interruption.

The record

CVE
CVE-2023-1697
Published
Apr 17, 2023
Updated
Feb 6, 2025
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-230, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=20.1R1 <20.1*
  2. Affected versionversion=20.2 <20.2R3-S6
  3. Affected versionversion=20.3 <20.3R3-S6
  4. Affected versionversion=20.4 <20.4R3-S5
  5. Affected versionversion=21.1 <21.1R3-S4
  6. Affected versionversion=21.2 <21.2R3-S3
  7. Affected versionversion=21.3 <21.3R3-S3
  8. Affected versionversion=21.4 <21.4R3-S1
  9. Affected versionversion=22.1 <22.1R2-S1, 22.1R3
  10. Affected versionversion=22.2 <22.2R1-S2, 22.2R2
  11. Affected versionversion=unspecified <19.4R3-S10

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=20.1R1 <20.1*; version=20.2 <20.2R3-S6; version=20.3 <20.3R3-S6; version=20.4 <20.4R3-S5; version=21.1 <21.1R3-S4; version=21.2 <21.2R3-S3; version=21.3 <21.3R3-S3; version=21.4 <21.4R3-S1; version=22.1 <22.1R2-S1, 22.1R3; version=22.2 <22.2R1-S2, 22.2R2; version=unspecified <19.4R3-S10

Published CVSS scores

6.5Juniper Networks, Inc.CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-230Improper Handling of Missing Values
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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