Schneider Electric Wonderware InduSoft Web Studio Privilege Escalation
Vendor: Schneider Electric
Equipment: Wonderware InduSoft Web Studio
Vulnerability: Incorrect Default Permissions
The following versions of Schneider Electric’s Wondeware InduSoft Web Studio are affected:
Wonderware InduSoft Web Studio v8.0 Patch 3 and prior versions.
Successful exploitation of this vulnerability could allow an authenticated user to escalate his or her privileges.
INCORRECT DEFAULT PERMISSIONS CWE-276
Upon installation, Wonderware InduSoft Web Studio creates a new directory and two files, which are placed in the system’s path and can be manipulated by non-administrators. This could allow an authenticated user to escalate his or her privileges.
The directory and files are added to system’s PATH. Therefore, the following can be manipulated by non-administrator users:
• File C:\Bin\x86\aahClientManaged.dll has weak permissions: ALLOW NT AUTHORITY\Authenticated Users: FILE_WRITE_DATA FILE_APPEND_DATA DELETE
• File C:\Bin\x86\ has weak permissions: ALLOW NT AUTHORITY\Authenticated Users: FILE_ADD_FILE FILE_ADD_SUBDIRECTORY FILE_WRITE_EA FILE_WRITE_ATTRIBUTES DELETE
CVE-2017-7968 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been assigned; the CVSS vector string is (AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).