Improper handling of exceptional conditions in Junos OS Evolved and Juniper Junos OS - CVE-2023-44186
Published: October 17, 2023
Vulnerability identifier: #VU82106
CSH Severity: Medium
CVSSv4.0: 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/E:U/U:Green
CVE-ID: CVE-2023-44186
CWE-ID: CWE-755
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Junos OS Evolved
Juniper Junos OS
Junos OS Evolved
Juniper Junos OS
Software vendor:
Juniper Networks, Inc.
Juniper Networks, Inc.
Description
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper handling of exceptional conditions in AS PATH processing when the router has Non-Stop Routing (NSR) enabled. A remote non-authenticated attacker can send a BGP update message with an AS PATH containing a large number of 4-byte ASes and perform a denial of service (DoS) attack.
Remediation
Install updates from vendor's website.