Use of uninitialized resource in Junos OS and Junos OS Evolved - CVE-2023-36836
Published: July 14, 2023
Vulnerability identifier: #VU78263
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-36836
CWE-ID: CWE-908
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (Dos) attack.
The vulnerability exists due to usage of uninitialized resources in a Multicast only Fast Reroute (MoFRR) scenario within the routing protocol daemon (rpd). A local user can trigger an uninitialized usage of resources by executing a specific low privileged CLI command and crash the rpd daemon.
Affected software
Junos OS
Junos OS Evolved
Junos OS Evolved
How to mitigate CVE-2023-36836
Install updates from vendor's website.
Junos OS - addressed in versions 19.4R3-S9, 20.2R3-S7, 20.3R3-S5, 20.4R3-S6, 21.1R3-S4, 21.2R3-S2, 21.3R3-S1, 21.4R3, 22.1R1-S2, 22.1R2, 22.2R2, 22.3R1
Junos OS Evolved - addressed in versions 20.4R3-S6-EVO, 21.3R3-S1-EVO, 21.4R3-EVO, 22.1R1-S2-EVO, 22.1R2-EVO, 22.2R2-EVO, 22.3R1-EVO
Junos OS Evolved - addressed in versions 20.4R3-S6-EVO, 21.3R3-S1-EVO, 21.4R3-EVO, 22.1R1-S2-EVO, 22.1R2-EVO, 22.2R2-EVO, 22.3R1-EVO