Incorrect Implementation of Authentication Algorithm in UNIVERGE SV9500 and UNIVERGE SV8500 - CVE-2020-5686
Published: January 4, 2021
Vulnerability identifier: #VU49228
CSH Severity: Low
CVSS v4: 7.2 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-5686
CWE-ID: CWE-303
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to to bypass authentication process.
The vulnerability exists due to incorrect implementation of authentication algorithm. A remote attacker on the local network can send a specially crafted request, access the remote system maintenance feature and disclose sensitive information.
Affected software
UNIVERGE SV9500
UNIVERGE SV8500
UNIVERGE SV8500
How to mitigate CVE-2020-5686
Install updates from vendor's website.
UNIVERGE SV9500 - addressed in versions V6 6.0, V7 8.0, V8 4.0
UNIVERGE SV8500 - update to S8 6.0
UNIVERGE SV8500 - update to S8 6.0