CVE-2023-28981

Junos OS and Junos OS Evolved: If malformed IPv6 router advertisements are received, memory corruption will occur which causes an rpd crash

MEDIUM

6.5

CVSS Score

Published: April 17, 2023 at 12:00 AM UTC

Updated: June 17, 2026 at 05:49 AM UTC

3 products affected across 2 vendorsJunosJunos OS EvolvedJunos OS Evolved

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Severity

MEDIUM6.5

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

An Improper Input Validation vulnerability in the kernel of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS). If the receipt of router advertisements is enabled on an interface and a specifically malformed RA packet is received, memory corruption will happen which leads to an rpd crash. This issue affects: Juniper Networks Junos OS 20.3 versions prior to 20.3R3-S5; 20.4 versions prior to 20.4R3-S3; 21.1 versions prior to 21.1R3-S4; 21.2 versions prior to 21.2R3; 21.3 versions prior to 21.3R3; 21.4 versions prior to 21.4R2; 22.1 versions prior to 22.1R2. Juniper Networks Junos OS Evolved 20.3-EVO version 20.3R1-EVO and later versions; 20.4-EVO versions prior to 20.4R3-S6-EVO; 21.3-EVO versions prior to 21.3R3-EVO; 21.4-EVO versions prior to 21.4R2-EVO; 22.1-EVO versions prior to 22.1R2-EVO.

Affected

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

Junos · Juniper Networks

95%

20.3 ≤ v < 20.3R3-S520.4 ≤ v < 20.4R3-S3, 20.4R3-S621.1 ≤ v < 21.1R3-S421.2 ≤ v < 21.2R321.3 ≤ v < 21.3R321.4 ≤ v < 21.4R222.1 ≤ v < 22.1R220.3 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 20.4 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 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 21.3 21.3 r1 21.3 r1-s1 21.3 r1-s2 21.3 r2 21.3 r2-s1 21.3 r2-s2 21.4 21.4 r1 21.4 r1-s1 21.4 r1-s2 22.1 22.1 r1 22.1 r1-s1 22.1 r1-s2

Affected range stops below 20.3R3-S5, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.4R3-S3, 20.4R3-S6, 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, so it looks safe — our inference, not a vendor statement

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

Affected range stops below 21.4R2, 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

Junos OS Evolved · Juniper Networks

60%

20.3R1-EVO ≤ v < 20.3-EVO*20.4-EVO ≤ v < 20.4R3-S6-EVO21.3-EVO ≤ v < 21.3R3-EVO21.4-EVO ≤ v < 21.4R2-EVO22.1-EVO ≤ v < 22.1R2-EVO20.3R1-EVO 20.4-EVO 21.3-EVO 21.4-EVO 22.1-EVO

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

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

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

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

Affected range stops below 22.1R2-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/JSA70607

References (1)

Vendor Advisory

Source: [email protected]

https://supportportal.juniper.net/JSA70607

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

6.5MEDIUMjuniper

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

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-20

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