Signed to unsigned conversion error in Junos OS and Junos OS Evolved - CVE-2025-30646
Published: April 14, 2025
Vulnerability identifier: #VU107432
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-30646
CWE-ID: CWE-195
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 signed to unsigned conversion error error in the Layer 2 Control Protocol daemon (l2cpd). A remote non-authenticated attacker can cause the l2cpd process to crash and restart, causing a Denial of Service (DoS).
Affected software
Junos OS
Junos OS Evolved
Junos OS Evolved
How to mitigate CVE-2025-30646
Install updates from vendor's website.
Junos OS - addressed in versions 21.2R3-S9, 21.4R3-S10, 22.2R3-S6, 22.4R3-S6, 23.2R2-S3, 23.4R2-S4, 24.2R2, 24.4R1
Junos OS Evolved - addressed in versions 21.4R3-S10-EVO, 22.2R3-S6-EVO, 22.4R3-S6-EVO, 23.2R2-S3-EVO, 23.4R2-S4-EVO, 24.2R2-EVO, 24.4R1-EVO
Junos OS Evolved - addressed in versions 21.4R3-S10-EVO, 22.2R3-S6-EVO, 22.4R3-S6-EVO, 23.2R2-S3-EVO, 23.4R2-S4-EVO, 24.2R2-EVO, 24.4R1-EVO