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01 Record

CVE-2024-39542

Junos OS and Junos OS Evolved: A malformed CFM packet or specific transit traffic leads to FPC crash

HighPUBLISHEDCNA: juniper
CNA base score8.7 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L

02 Description

Junos OS and Junos OS Evolved: A malformed CFM packet or specific transit traffic leads to FPC crash

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.47% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 40.5% of scored records. A rank, not a probability.
NVD base score
8.7 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD analysis status
Analyzed. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2024-07-11 16:17Z2 YR AGO
Last updated
2024-08-02 04:26Z2 YR AGO
Reserved
2024-06-25
Assigning CNA
juniper
Record state
PUBLISHED
Severity
High (CVSS 8.7)
CNA CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L
Weaknesses
  • CWE-1286Improper Validation of Syntactic Correctness of InputBase
Data version
5.1
Document digest
7337e6680d651d0918a9db886cde0184f1985a24e47d0caf7b7d9532fe8b430d

05 Affected products

VendorProductVersionsPlatforms
Juniper NetworksJunos OS0 to < 21.2R3-S4, 21.4 to < 21.4R2, 22.2 to < 22.2R2-S1, 22.2R3MX Series with MPC10 MPC11 or LC9600, MX304
Juniper NetworksJunos OS Evolved0 to < 21.2R3-S8-EVO, 21.4 to < 21.4R2-EVOPTX Series, ACX Series
juniperjunos_os0 to < 21.2r3-s4, 21.4 to < 21.4r2, 22.2 to < 22.2r2-s1, 22.2 to < 22.2r3—
juniperjunos_os_evolved0 to < 21.2r3-s8-evo, 21.4 to < 21.4r2-evo—

06 References

07 Remediation

The following software releases have been updated to resolve this specific issue: Junos OS: 21.2R3-S4, 21.4R2, 22.2R2-S1, 22.2R3, 22.3R1, and all subsequent releases. Junos OS Evolved: 21.2R3-S8-EVO, 21.4R2-EVO, 22.2R1-EVO, and all subsequent releases.