Improper check for unusual or exceptional conditions in Junos OS - CVE-2024-39561
Published: July 15, 2024
Vulnerability identifier: #VU94348
CSH Severity: Medium
CVSS v4: 6.9 [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]
CVE-ID: CVE-2024-39561
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 bypass implemented security restrictions.
The vulnerability exists due to improper check for unusual or exceptional conditions error in the flow daemon (flowd). A remote non-authenticated attacker can send TCP packets with SYN/FIN or SYN/RST flags, bypassing the expected blocking of these packets.
Affected software
Junos OS
How to mitigate CVE-2024-39561
Install updates from vendor's website.
Junos OS - addressed in versions 21.2R3-S8, 21.4R3-S7, 22.1R3-S6, 22.2R3-S4, 22.3R3-S3, 22.4R3-S2, 23.2R2, 23.4R1-S1, 23.4R2, 24.2R1