Improper check for unusual or exceptional conditions in Junos OS and Junos OS Evolved - CVE-2024-30402
Published: April 10, 2024
Vulnerability identifier: #VU88437
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2024-30402
CWE-ID: CWE-754
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an improper check for unusual or exceptional conditions error in the Layer 2 Address Learning Daemon (l2ald). A remote non-authenticated attacker can cause a Denial of Service (DoS).
When telemetry requests are sent to the device, and the Dynamic Rendering Daemon (drend) is suspended, the l2ald crashes and restarts due to factors outside the attackers control.
Repeated occurrences of these events causes a sustained DoS condition.
Affected software
Junos OS
Junos OS Evolved
Junos OS Evolved
How to mitigate CVE-2024-30402
Install updates from vendor's website.
Junos OS - addressed in versions 20.4R3-S10, 21.2R3-S7, 21.4R3-S5, 22.1R3-S4, 22.2R3-S3, 22.3R3-S1, 22.4R3, 23.2R1-S2, 23.2R2, 23.4R1
Junos OS Evolved - addressed in versions 21.4R3-S5-EVO, 22.1R3-S4-EVO, 22.2R3-S3-EVO, 22.3R3-S1-EVO, 22.4R3-EVO, 23.2R2-EVO, 23.4R1-EVO
Junos OS Evolved - addressed in versions 21.4R3-S5-EVO, 22.1R3-S4-EVO, 22.2R3-S3-EVO, 22.3R3-S1-EVO, 22.4R3-EVO, 23.2R2-EVO, 23.4R1-EVO