CVE-2023-44192Network attack vector

Network traffic interruption via DHCP-triggered DMA leak

Published Oct 12, 2023 · Updated Sep 18, 2024

Improper input validation in Juniper Networks Junos OS on QFX5000 Series switches allows remote attackers to interrupt traffic via DHCP packets. The Packet Forwarding Engine mishandles specially formed DHCP traffic for an EVPN-VXLAN pseudo-VTEP and fails to release DMA memory. Exposure requires pseudo-VTEP configuration on a QFX5000 Series switch; sustained packets exhaust memory, stop protocols, and interrupt traffic until a manual reboot.

CVSS severity7.5
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Juniper Networks Junos OS on QFX5000 Series switches allows remote attackers to interrupt traffic via DHCP packets. The Packet Forwarding Engine mishandles specially formed DHCP traffic for an EVPN-VXLAN pseudo-VTEP and fails to release DMA memory. Exposure requires pseudo-VTEP configuration on a QFX5000 Series switch; sustained packets exhaust memory, stop protocols, and interrupt traffic until a manual reboot.

The record

CVE
CVE-2023-44192
Published
Oct 12, 2023
Updated
Sep 18, 2024
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-401, CWE-20, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <20.4r3-s6
  2. Affected versionversion=0 <20.4R3-S6
  3. Affected versionversion=21.1 <21.1r3-s5
  4. Affected versionversion=21.1 <21.1R3-S5
  5. Affected versionversion=21.2 <21.2r3-s5
  6. Affected versionversion=21.2 <21.2R3-S5
  7. Affected versionversion=21.3 <21.3r3-s4
  8. Affected versionversion=21.3 <21.3R3-S4
  9. Affected versionversion=21.4 <21.4r3-s3
  10. Affected versionversion=21.4 <21.4R3-S3
  11. Affected versionversion=22.1 <22.1r3-s2
  12. Affected versionversion=22.1 <22.1R3-S2
  13. Affected versionversion=22.2 <22.2r2-s2
  14. Affected versionversion=22.2 <22.2R2-S2, 22.2R3
  15. Affected versionversion=22.2 <22.2r3
  16. Affected versionversion=22.3 <22.3r2-s1
  17. Affected versionversion=22.3 <22.3R2-S1, 22.3R3
  18. Affected versionversion=22.3 <22..3r3
  19. Affected versionversion=22.4 <22.4R1-S2, 22.4R2
  20. Affected versionversion=22.4 <22.4r2
  21. Affected versionversion=22.4 <22.4r2-s2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=0 <20.4r3-s6; version=0 <20.4R3-S6; version=21.1 <21.1r3-s5; version=21.1 <21.1R3-S5; version=21.2 <21.2r3-s5; version=21.2 <21.2R3-S5; version=21.3 <21.3r3-s4; version=21.3 <21.3R3-S4; version=21.4 <21.4r3-s3; version=21.4 <21.4R3-S3; version=22.1 <22.1r3-s2; version=22.1 <22.1R3-S2; version=22.2 <22.2r2-s2; version=22.2 <22.2R2-S2, 22.2R3; version=22.2 <22.2r3; version=22.3 <22.3r2-s1; version=22.3 <22.3R2-S1, 22.3R3; version=22.3 <22..3r3; version=22.4 <22.4R1-S2, 22.4R2; version=22.4 <22.4r2; version=22.4 <22.4r2-s2

Published CVSS scores

7.5Juniper NetworksCVSS:3.1/AV:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
CWE-20Improper Input Validation
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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