CVE-2024-39516

Junos OS and Junos OS Evolved: With certain BGP options enabled, receipt of specifically malformed BGP update causes RPD crash

HIGH

7.5

CVSS Score

Published: October 9, 2024 at 08:00 PM UTC

Updated: June 17, 2026 at 07:42 AM UTC

3 products affected across 2 vendorsJunosJunos OS EvolvedJunos OS Evolved

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Severity

HIGH7.5

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

Description

An Out-of-Bounds Read vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network-based attacker sending a specifically malformed BGP packet to cause rpd to crash and restart, 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 configured in either of two ways: * systems with BGP traceoptions enabled * systems with BGP traffic engineering configured This issue can affect iBGP and eBGP with any address family configured. The specific attribute involved is non-transitive, and will not propagate across a network. This issue affects: Junos OS: * All versions before 21.4R3-S8, * 22.2 before 22.2R3-S5, * 22.3 before 22.3R3-S4, * 22.4 before 22.4R3-S3, * 23.2 before 23.2R2-S2, * 23.4 before 23.4R2; Junos OS Evolved: * All versions before 21.4R3-S8-EVO, * 22.2-EVO before 22.2R3-S5-EVO, * 22.3-EVO before 22.3R3-S4-EVO, * 22.4-EVO before 22.4R3-S3-EVO, * 23.2-EVO before 23.2R2-S2-EVO, * 23.4-EVO before 23.4R2-EVO.

Affected

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

Junos OS Evolved · Juniper

95%

v < 21.4v < 21.4R3-S822.2 ≤ v < 22.2R3-S522.3 ≤ v < 22.3R3-S422.4 ≤ v < 22.4R3-S323.2 ≤ v < 23.2R2-S223.4 ≤ v < 23.4R221.4 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 21.4 r3-s3 21.4 r3-s4 21.4 r3-s5 21.4 r3-s6 21.4 r3-s7 22.2 22.2 r1 22.2 r1-s1 22.2 r1-s2 22.2 r2 22.2 r2-s1 22.2 r2-s2 22.2 r3 22.2 r3-s1 22.2 r3-s2 22.2 r3-s3 22.2 r3-s4 22.3 22.3 r1 22.3 r1-s1 22.3 r1-s2 22.3 r2 22.3 r2-s1 22.3 r2-s2 22.3 r3 22.3 r3-s1 22.3 r3-s2 22.3 r3-s3 22.4 22.4 r1 22.4 r1-s1 22.4 r1-s2 22.4 r2 22.4 r2-s1 22.4 r2-s2 22.4 r3 22.4 r3-s1 22.4 r3-s2 23.2 23.2 r1 23.2 r1-s1 23.2 r1-s2 23.2 r2 23.2 r2-s1 23.4 23.4 r1 23.4 r1-s1 23.4 r1-s2

Affected range stops below 21.4R3-S8, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.2R3-S5, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.3R3-S4, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.4R3-S3, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.2R2-S2, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.4R2, so it looks safe — our inference, not a vendor statement

Junos · Juniper Networks

95%

Affected range stops below 21.4R3-S8, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.2R3-S5, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.3R3-S4, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.4R3-S3, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.2R2-S2, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.4R2, so it looks safe — our inference, not a vendor statement

Junos OS Evolved · Juniper Networks

60%

v < 21.4R3-S8-EVO22.2-EVO ≤ v < 22.2R3-S5-EVO22.3-EVO ≤ v < 22.3R3-S4-EVO22.4-EVO ≤ v < 22.4R3-S3-EVO23.2-EVO ≤ v < 23.2R2-S2-EVO23.4-EVO ≤ v < 23.4R2-EVO22.2-EVO 22.3-EVO 22.4-EVO 23.2-EVO 23.4-EVO

Affected range stops below 21.4R3-S8-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.2R3-S5-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.3R3-S4-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.4R3-S3-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.2R2-S2-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.4R2-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/JSA88100

References (2)

Vendor Advisory

Source: [email protected]

https://supportportal.juniper.net/JSA88100

RelatedProductTechnical Description

Source: [email protected]

https://www.juniper.net/documentation/us/en/software/junos/cli-reference/topics/ref/statement/traceoptions-edit-protocols-bgp.html

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

StatusANALYZED

CWE

CWE-125

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