Race condition in Junos OS - CVE-2020-1667
Published: October 15, 2020
Vulnerability identifier: #VU47666
CSH Severity: High
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-1667
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to a race condition when DNS filtering is enabled with one of the following cards MS-PIC, MS-MIC or MS-MPC. A remote attacker can exploit the race, cause a deial of service (DoS) condition and escalate privileges on the system.
Affected software
Junos OS
How to mitigate CVE-2020-1667
Install updates from vendor's website.
Junos OS - addressed in versions 17.3R3-S8, 18.3R3-S1, 18.4R3, 19.1R3, 19.2R2, 19.3R3, 19.4R1