Main Vulnerability Database Vulnerabilities #VU85271

#VU85271 Improper validation of syntactic correctness of input in Juniper Junos OS - CVE-2024-21595

Published: January 10, 2024

Vulnerability identifier: #VU85271

Vulnerability risk: 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-2024-21595

CWE-ID: CWE-1286

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Juniper Junos OS

Software vendor:
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 validation of syntactic correctness of input error in the Packet Forwarding Engine (PFE). A remote non-authenticated attacker can cause a Denial of Service (DoS).

If an attacker sends high rate of specific ICMP traffic to a device with VXLAN configured, this causes a deadlock of the PFE and results in the device becoming unresponsive.

A manual restart will be required to recover the device.

Remediation

Install updates from vendor's website.

External links

https://supportportal.juniper.net/s/article/2024-01-Security-Bulletin-Junos-OS-EX4100-EX4400-EX4600-and-QFX5000-Series-A-high-rate-of-specific-ICMP-traffic-will-cause-the-PFE-to-hang-CVE-2024-21595