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CVE-2024-30407: [Child CVE] JCNR and cRPD: Hard-coded SSH host keys in cRPD may allow Person-in-the-Middle (PitM) attacks

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-04-12 · updated 2026-06-17
• Weakness: CWE-321

Description

The Use of a Hard-coded Cryptographic Key vulnerability in Juniper Networks Juniper Cloud Native Router (JCNR) and containerized routing Protocol Deamon (cRPD) products allows an attacker to perform Person-in-the-Middle (PitM) attacks which results in complete compromise of the container. Due to hardcoded SSH host keys being present on the container, a PitM attacker can intercept SSH traffic without being detected.  This issue affects Juniper Networks JCNR: * All versions before 23.4. This issue affects Juniper Networks cRPD: * All versions before 23.4R1.

Affected products

• Juniper Cloud Native Router: before 23.4 — fixed in 23.4
• Juniper Networks, Inc. cRPD: before 23.4r1 — fixed in 23.4r1

How to fix

Upgrade to a fixed version: Juniper Cloud Native Router 23.4; Juniper Networks, Inc. cRPD 23.4r1. Check the vendor advisory for mitigations.

References

• https://supportportal.juniper.net/JSA79106
• https://supportportal.juniper.net/JSA79107
• https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
• https://supportportal.juniper.net/JSA79106
• https://supportportal.juniper.net/JSA79107
• https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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