Resource exhaustion in Junos OS - CVE-2022-22191
Published: April 13, 2022
Vulnerability identifier: #VU82466
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2022-22191
CWE-ID: CWE-400
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
A Denial of Service (DoS) vulnerability in the processing of a flood of specific ARP traffic in Juniper Networks Junos OS on the EX4300 switch, sent from the local broadcast domain, may allow an unauthenticated network-adjacent attacker to trigger a PFEMAN watchdog timeout, causing the Packet Forwarding Engine (PFE) to crash and restart.
After the restart, transit traffic will be temporarily interrupted until the PFE is reprogrammed.
Affected software
Junos OS
How to mitigate CVE-2022-22191
Install updates from vendor's website.
Junos OS - addressed in versions 15.1R7-S12, 18.4R2-S10, 18.4R3-S11, 19.1R3-S8, 19.2R1-S9, 19.2R3-S4, 19.3R3-S5, 19.4R2-S6, 19.4R3-S7, 20.1R3-S3, 20.2R3-S3, 20.3R3-S2, 20.4R3-S1, 21.1R3, 21.2R2-S1, 21.2R3, 21.3R1-S2, 21.3R2, 21.4R1