Improper Check for Unusual or Exceptional Conditions in Juniper Networks, Inc. products - CVE-2021-31364
Published: October 14, 2021
Vulnerability identifier: #VU57360
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-31364
CWE-ID: CWE-754
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper check for unusual or exceptional conditions in the flow daemon (flowd). A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
Affected software
SRX300
SRX500
SRX1500
SRX5000
Junos OS
SRX500
SRX1500
SRX5000
Junos OS
How to mitigate CVE-2021-31364
Install updates from vendor's website.
Junos OS - addressed in versions 17.4R3-S5, 18.3R3-S5, 18.4R3-S9, 19.1R3-S6, 19.2R1-S7, 19.2R3-S2, 19.3R2-S6, 19.3R3-S2, 19.4R1-S4, 19.4R3-S3, 20.1R2-S2, 20.1R3, 20.2R3, 20.3R2-S1, 20.3R3, 20.4R2, 21.1R1