Path traversal in Advantech WebAccess - CVE-2020-12026
Published: May 11, 2020 / Updated: May 11, 2020
Vulnerability identifier: #VU27650
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-12026
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error within the implementation of IOCTL 0x0000277d in ViewSrv.dll. A remote attacker can pass specially crafted data to the application and overwrite arbitrary files on the system.
Affected software
Advantech WebAccess
How to mitigate CVE-2020-12026
Install update from vendor's website.
Advantech WebAccess - addressed in versions 8.4.4_P0320844, 9.0.0_P0320900