CVE-2023-22393

Junos OS and Junos OS Evolved: RPD crash upon receipt of BGP route with invalid next-hop

HIGH

7.5

CVSS Score

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

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

3 products affected across 2 vendorsJunosJunos OS EvolvedJunos OS Evolved

Using Junos OS by Juniper Networks?

Get instant alerts when new vulnerabilities affect Junos OS - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

HIGH7.5

Exploit prediction

EPSS 0.6%

SSVC

No known exploit

Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in BGP route processing of Juniper Networks Junos OS and Junos OS Evolved allows an attacker to cause Routing Protocol Daemon (RPD) crash by sending a BGP route with invalid next-hop resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue only affects systems without import policy configured. This issue affects: Juniper Networks Junos OS 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 22.1R1-S2, 22.1R2; 22.2 versions prior to 22.2R1-S1, 22.2R2. Juniper Networks Junos OS Evolved 21.4-EVO versions prior to 21.4R2-S2-EVO, 21.4R3-EVO; 22.1-EVO versions prior to 22.1R1-S2-EVO, 22.1R2-EVO; 22.2-EVO versions prior to 22.2R1-S1-EVO, 22.2R2-EVO. This issue does not affect: Juniper Networks Junos OS versions prior to 21.1R1. Juniper Networks Junos OS Evolved versions prior to 21.3R1-EVO.

Affected

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

Junos OS Evolved · Juniper

95%

21.4 21.4 r1 21.4 r1-s1 21.4 r1-s2 21.4 r2 21.4 r2-s1 22.1 r1 22.1 r1-s1 22.2 r1

Junos · Juniper Networks

95%

21.1 ≤ v < 21.1R3-S421.2 ≤ v < 21.2R3-S321.3 ≤ v < 21.3R3-S221.4 ≤ v < 21.4R2-S2, 21.4R322.1 ≤ v < 22.1R1-S2, 22.1R222.2 ≤ v < 22.2R1-S1, 22.2R221.1 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 22.2 22.2 r1

Vendor states this is fixed in 21.1R1 (unaffected)

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 22.1R1-S2, 22.1R2, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.2R1-S1, 22.2R2, so it looks safe — our inference, not a vendor statement

Junos OS Evolved · Juniper Networks

60%

21.4-EVO ≤ v < 21.4R2-S2-EVO, 21.4R3-EVO22.1-EVO ≤ v < 22.1R1-S2-EVO, 22.1R2-EVO22.2-EVO ≤ v < 22.2R1-S1-EVO, 22.2R2-EVO21.4-EVO 22.1-EVO 22.2-EVO

Vendor states this is fixed in 21.3R1-EVO (unaffected)

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

Affected range stops below 22.1R1-S2-EVO, 22.1R2-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.2R1-S1-EVO, 22.2R2-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://kb.juniper.net/JSA70189

References (1)

Vendor Advisory

Source: [email protected]

https://kb.juniper.net/JSA70189

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-358CWE-754

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card