Vulnerability in Juniper Junos
CVE-2024-21597
An Exposure of Resource to Wrong Sphere vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to bypass the intended access restrictions. In an Abstracted Fabric (AF) scenario if routing-instances (RI) are configured, specific valid traffic destined to the device can bypass the configured lo0 firewall filters as it's received in the wrong RI context. This issue affects Juniper Networks Junos OS on MX Series: * All versions earlier than 20.4R3-S9; * 21.2 versions earlier than 21.2R3-S3; * 21.4 versions earlier than 21.4R3-S5; * 22.1 versions earlier than 22.1R3; * 22.2 versions earlier than 22.2R3; * 22.3 versions earlier than 22.3R2.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (28.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Juniper Junos — versions 20.4, 21.2, 21.4
- Juniper Networks Junos OS — versions 0, 21.2, 21.4
Weakness classification (CWE)
References
- supportportal.juniper.net/JSA75738 (vendor-advisory, Vendor Advisory)
- www.first.org/cvss/calculator/4.0 (technical-description, Third Party Advisory)
Frequently asked questions
- What is CVE-2024-21597?
- CVE-2024-21597 is a medium-severity vulnerability in Juniper Junos, classified under Exposure of Resource to Wrong Sphere. CVSS score: 5.3/10. Published 2024-01-12.
- How severe is CVE-2024-21597?
- Medium severity. CVSS v3 base score is 5.3 out of 10.