CVE-2023-22399

Junos OS: QFX10K Series: PFE crash upon receipt of specific genuine packets when sFlow is enabled

HIGH

7.5

CVSS Score

Published: January 12, 2023 at 12:00 AM UTC

Updated: June 17, 2026 at 05:35 AM UTC

1 product affected across 1 vendorJunos

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Severity

HIGH7.5

Exploit prediction

EPSS 0.7%

SSVC

No known exploit

Description

When sFlow is enabled and it monitors a packet forwarded via ECMP, a buffer management vulnerability in the dcpfe process of Juniper Networks Junos OS on QFX10K Series systems allows an attacker to cause the Packet Forwarding Engine (PFE) to crash and restart by sending specific genuine packets to the device, resulting in a Denial of Service (DoS) condition. The dcpfe process tries to copy more data into a smaller buffer, which overflows and corrupts the buffer, causing a crash of the dcpfe process. Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS on QFX10K Series: All versions prior to 19.4R3-S9; 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-S2; 21.4 versions prior to 21.4R2-S2, 21.4R3; 22.1 versions prior to 22.1R2; 22.2 versions prior to 22.2R1-S2, 22.2R2.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Junos · Juniper Networks

95%

v < 19.4R3-S920.2 ≤ v < 20.2R3-S620.3 ≤ v < 20.3R3-S620.4 ≤ v < 20.4R3-S521.1 ≤ v < 21.1R3-S421.2 ≤ v < 21.2R3-S321.3 ≤ v < 21.3R3-S221.4 ≤ v < 21.4R2-S2, 21.4R322.1 ≤ v < 22.1R222.2 ≤ v < 22.2R1-S2, 22.2R219.4 19.4 r1 19.4 r1-s1 19.4 r1-s2 19.4 r1-s3 19.4 r1-s4 19.4 r2 19.4 r2-s1 19.4 r2-s2 19.4 r2-s3 19.4 r2-s4 19.4 r2-s5 19.4 r2-s6 19.4 r2-s7 19.4 r3 19.4 r3-s1 19.4 r3-s2 19.4 r3-s3 19.4 r3-s4 19.4 r3-s5 19.4 r3-s6 19.4 r3-s7 19.4 r3-s8 20.2 20.2 r1 20.2 r1-s1 20.2 r1-s2 20.2 r1-s3 20.2 r2 20.2 r2-s1 20.2 r2-s2 20.2 r2-s3 20.2 r3 20.2 r3-s1 20.2 r3-s2 20.2 r3-s3 20.2 r3-s4 20.2 r3-s5 20.3 20.3 r1 20.3 r1-s1 20.3 r1-s2 20.3 r2 20.3 r2-s1 20.3 r3 20.3 r3-s1 20.3 r3-s2 20.3 r3-s3 20.3 r3-s4 20.3 r3-s5 20.4 20.4 r1 20.4 r1-s1 20.4 r2 20.4 r2-s1 20.4 r2-s2 20.4 r3 20.4 r3-s1 20.4 r3-s2 20.4 r3-s3 20.4 r3-s4 21.1 21.1 r1 21.1 r1-s1 21.1 r2 21.1 r2-s1 21.1 r2-s2 21.1 r3 21.1 r3-s1 21.1 r3-s2 21.1 r3-s3 21.2 21.2 r1 21.2 r1-s1 21.2 r1-s2 21.2 r2 21.2 r2-s1 21.2 r2-s2 21.2 r3 21.2 r3-s1 21.2 r3-s2 21.3 21.3 r1 21.3 r1-s1 21.3 r1-s2 21.3 r2 21.3 r2-s1 21.3 r2-s2 21.3 r3 21.3 r3-s1 21.4 21.4 r1 21.4 r1-s1 21.4 r1-s2 21.4 r2 21.4 r2-s1 22.1 22.1 r1 22.1 r1-s1 22.1 r1-s2 22.2 22.2 r1 22.2 r1-s1

Affected range stops below 19.4R3-S9, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.2R3-S6, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.3R3-S6, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.4R3-S5, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.1R3-S4, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.2R3-S3, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.3R3-S2, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.4R2-S2, 21.4R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.1R2, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.2R1-S2, 22.2R2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://kb.juniper.net/JSA70195

References (2)

Vendor Advisory

Source: [email protected]

https://kb.juniper.net/JSA70195

Product

Source: [email protected]

https://www.juniper.net/documentation/us/en/software/junos/network-mgmt/topics/topic-map/sflow-monitoring-technology.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHjuniper

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-120

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