#VU52284 Race condition in Juniper Junos OS - CVE-2021-0247

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Main Vulnerability Database Vulnerabilities #VU52284

#VU52284 Race condition in Juniper Junos OS - CVE-2021-0247

Published: April 16, 2021


Vulnerability identifier: #VU52284
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-0247
CWE-ID: CWE-362
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 attacker to bypass implemented security restrictions.

The vulnerability exists due to a race condition in the firewall process (dfwd). A remote attacker can bypass the firewall rule sets applied to the input loopback filter on any interfaces of a device.


Remediation

Install updates from vendor's website.

External links