CVE-2023-44185

Junos OS and Junos OS Evolved: In an BGP scenario RPD crashes upon receiving and processing a specific malformed ISO VPN BGP UPDATE packet

HIGH

7.5

CVSS Score

Published: October 12, 2023 at 11:02 PM UTC

Updated: June 17, 2026 at 06:27 AM UTC

3 products affected across 2 vendorsJunosJunos OS EvolvedJunos OS Evolved

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Severity

HIGH7.5

Exploit prediction

EPSS 0.6%

SSVC

No known exploit

Description

An Improper Input Validation vulnerability in the routing protocol daemon (rpd) of Juniper Networks allows an attacker to cause a Denial of Service (DoS )to the device upon receiving and processing a specific malformed ISO VPN BGP UPDATE packet. Continued receipt of this packet will cause a sustained Denial of Service condition. This issue affects: * Juniper Networks Junos OS: * All versions prior to 20.4R3-S6; * 21.1 versions prior to 21.1R3-S5; * 21.2 versions prior to 21.2R3-S4; * 21.3 versions prior to 21.3R3-S3; * 21.4 versions prior to 21.4R3-S3; * 22.1 versions prior to 22.1R2-S2, 22.1R3; * 22.2 versions prior to 22.2R2-S1, 22.2R3; * 22.3 versions prior to 22.3R1-S2, 22.3R2. Juniper Networks Junos OS Evolved: * All versions prior to 20.4R3-S6-EVO; * 21.1-EVO version 21.1R1-EVO and later versions prior to 21.2R3-S4-EVO; * 21.3-EVO versions prior to 21.3R3-S3-EVO; * 21.4-EVO versions prior to 21.4R3-S3-EVO; * 22.1-EVO versions prior to 22.1R3-EVO; * 22.2-EVO versions prior to 22.2R2-S1-EVO, 22.2R3-EVO; * 22.3-EVO versions prior to 22.3R1-S2-EVO, 22.3R2-EVO.

Affected

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

Junos OS Evolved · Juniper

95%

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

Junos · Juniper Networks

95%

v < 20.4v < 20.4R3-S621.1 ≤ v < 21.1R3-S521.2 ≤ v < 21.2R3-S421.3 ≤ v < 21.3R3-S321.4 ≤ v < 21.4R3-S322.1 ≤ v < 22.1R2-S2, 22.1R322.2 ≤ v < 22.2R2-S1, 22.2R322.3 ≤ v < 22.3R1-S2, 22.3R220.4 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 20.4 r3-s5 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 21.1 r3-s4 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 21.2 r3-s3 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 21.3 r3-s2 21.4 21.4 r1 21.4 r1-s1 21.4 r1-s2 21.4 r2 21.4 r2-s1 21.4 r2-s2 21.4 r3 21.4 r3-s1 21.4 r3-s2 22.1 22.1 r1 22.1 r1-s1 22.1 r1-s2 22.1 r2 22.1 r2-s1 22.2 22.2 r1 22.2 r1-s1 22.2 r1-s2 22.2 r2 22.3 22.3 r1 22.3 r1-s1

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

Affected range stops below 20.4R3-S6, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.1R3-S5, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.2R3-S4, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.3R3-S3, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.4R3-S3, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.1R2-S2, 22.1R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.2R2-S1, 22.2R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.3R1-S2, 22.3R2, so it looks safe — our inference, not a vendor statement

Junos OS Evolved · Juniper Networks

60%

v < 20.4R3-S6-EVO21.1R1-EVO ≤ v < 21.1*-EVO21.2-EVO ≤ v < 21.2R3-S4-EVO21.3-EVO ≤ v < 21.3R3-S3-EVO21.4-EVO ≤ v < 21.4R3-S3-EVO22.1-EVO ≤ v < 22.1R3-EVO22.2-EVO ≤ v < 22.2R2-S1-EVO, 22.2R3-EVO22.3-EVO ≤ v < 22.3R1-S2-EVO, 22.3R2-EVO21.1R1-EVO 21.2-EVO 21.3-EVO 21.4-EVO 22.1-EVO 22.2-EVO 22.3-EVO

Affected range stops below 20.4R3-S6-EVO, so it looks safe — our inference, not a vendor statement

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

Affected range stops below 21.2R3-S4-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.3R3-S3-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 21.4R3-S3-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.1R3-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.2R2-S1-EVO, 22.2R3-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.3R1-S2-EVO, 22.3R2-EVO, 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://supportportal.juniper.net/JSA73146

References (1)

Vendor Advisory

Source: [email protected]

https://supportportal.juniper.net/JSA73146

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial 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-20NVD-CWE-noinfo

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