Input validation error in Junos OS - CVE-2021-0278
Published: July 20, 2021
Vulnerability identifier: #VU55002
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-0278
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain elevated privileges on the system.
The vulnerability exists due to insufficient validation of user-supplied input in J-Web. A remote authenticated attacker can pass specially crafted input to the application and escalate privileges to root over the target device.
Affected software
Junos OS
How to mitigate CVE-2021-0278
Install updates from vendor's website.
Junos OS - addressed in versions 19.3R2-S6, 19.3R3-S3, 19.4R3-S5, 20.1R2-S2, 20.1R3-S1, 20.2R3-S2, 20.3R3, 20.4R2-S1, 20.4R3, 21.1R1-S1, 21.1R2, 21.2R1