CVE-2024-47490

Junos OS Evolved: ACX 7000 Series: Receipt of specific transit MPLS packets causes resources to be exhausted

HIGH

8.2

CVSS Score

Published: October 11, 2024 at 03:22 PM UTC

Updated: June 17, 2026 at 07:57 AM UTC

2 products affected across 2 vendorsJunos OS EvolvedJunos OS Evolved

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Severity

HIGH8.2

Exploit prediction

EPSS 0.6%

SSVC

No known exploit

Description

An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved on ACX 7000 Series allows an unauthenticated, network based attacker to cause increased consumption of resources, ultimately resulting in a Denial of Service (DoS). When specific transit MPLS packets are received by the PFE, these packets are internally forwarded to the Routing Engine (RE), rather than being handled appropriately. Continuous receipt of these MPLS packets causes resources to be exhausted. MPLS config is not required to be affected by this issue. This issue affects Junos OS Evolved ACX 7000 Series: * All versions before 21.4R3-S9-EVO, * 22.2-EVO before 22.2R3-S4-EVO, * 22.3-EVO before 22.3R3-S3-EVO, * 22.4-EVO before 22.4R3-S2-EVO, * 23.2-EVO before 23.2R2-EVO, * 23.4-EVO before 23.4R1-S1-EVO, 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-s9-evo22.2 ≤ v < 22.2r3-s4-evo22.3 ≤ v < 22.3r3-s3-evo22.4 ≤ v < 22.4r3-s2-evo23.2 ≤ v < 23.2r2-evo23.4 ≤ v < 23.4r1-s1-evo23.4 ≤ v < 23.4r2-evo21.4 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 21.4 r3-s8 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 22.3 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 22.4 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 23.2 23.2 r1 23.2 r1-s1 23.2 r1-s2 23.4 23.4 r1 23.4 r2

Affected range stops below 21.4r3-s9-evo, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.2r3-s4-evo, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.3r3-s3-evo, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.4r3-s2-evo, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.2r2-evo, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.4r1-s1-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

juniper-acx7020 (environment) · juniper-acx7024 (environment) · juniper-acx7024x (environment) · juniper-acx7100 (environment) · juniper-acx7300 (environment) · juniper-acx7509 (environment)

Junos OS Evolved · Juniper Networks

60%

v < 21.4R3-S9-EVO22.2-EVO ≤ v < 22.2R3-S4-EVO22.3-EVO ≤ v < 22.3R3-S3-EVO22.4-EVO ≤ v < 22.4R3-S2-EVO23.2-EVO ≤ v < 23.2R2-EVO23.4-EVO ≤ v < 23.4R1-S1-EVO, 23.4R2-EVO22.2-EVO 22.3-EVO 22.4-EVO 23.2-EVO 23.4-EVO

Affected range stops below 21.4R3-S9-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.2R3-S4-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.3R3-S3-EVO, so it looks safe — our inference, not a vendor statement

Affected range stops below 22.4R3-S2-EVO, so it looks safe — our inference, not a vendor statement

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

Affected range stops below 23.4R1-S1-EVO, 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/JSA83009

References (1)

Vendor Advisory

Source: [email protected]

https://supportportal.juniper.net/JSA83009

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

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

CVSS

8.2HIGHjuniper

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

Vector?

Quick Info

StatusANALYZED

CWE

CWE-923

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