Improper handling of inconsistent special elements in Junos OS - CVE-2023-36843
Published: October 25, 2023
Vulnerability identifier: #VU82386
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-2023-36843
CWE-ID:
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 improper handling of inconsistent special elements error in the Junos Services Framework (jsf) module when handling malformed SSL traffic. A remote non-authenticated attacker can cause a crash in the Packet Forwarding Engine (pfe).
This issue only affects devices with Juniper Networks Advanced Threat Prevention (ATP) Cloud enabled with Encrypted Traffic Insights (configured via security-metadata-streaming policy).
Affected software
Junos OS
How to mitigate CVE-2023-36843
Install updates from vendor's website.
Junos OS - addressed in versions 20.4R3-S8, 21.2R3-S6, 21.3R3-S5, 21.4R3-S5, 22.1R3-S4, 22.2R3-S2, 22.3R2-S2, 22.3R3, 22.4R2-S1, 22.4R3, 23.1R2, 23.2R1