01 Record
CVE-2024-21597
Junos OS: MX Series: In an AF scenario traffic can bypass configured lo0 firewall filters
MediumPUBLISHEDCNA: juniper
CNA base score5.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
02 Description
Junos OS: MX Series: In an AF scenario traffic can bypass configured lo0 firewall filters
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.
- EPSS probability
- 0.37% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 31.1% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- NVD analysis status
- Modified. 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
- 2024-01-12 00:53Z2 YR AGO
- Last updated
- 2025-06-03 14:05Z1 YR AGO
- Reserved
- 2023-12-27
- Assigning CNA
- juniper
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.3)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weaknesses
- CWE-668Exposure of Resource to Wrong SphereClass
- Data version
- 5.1
- Document digest
- eeb7a6378c0fdf2a827c03b07f8de439d32e1d551b15dfc540d9eaf63031db84
05 Affected products
VendorProductVersionsPlatforms
Juniper NetworksJunos OS0 to < 20.4R3-S9, 21.2 to < 21.2R3-S3, 21.4 to < 21.4R3-S5, 22.1 to < 22.1R3, 22.2 to < 22.2R3, 22.3 to < 22.3R2MX Series
06 References
- supportportal.juniper.nethttps://supportportal.juniper.net/JSA75738
- www.first.orghttps://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
07 Remediation
The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S9, 21.2R3-S3, 21.4R3-S5, 22.1R3, 22.2R3, 22.3R2, 22.4R1, and all subsequent releases.