Incorrect Default Permissions
CVE-2020-15843
Summary
ActFax Version 7.10 Build 0335 (2020-05-25) is susceptible to a privilege escalation vulnerability due to insecure folder permissions on %PROGRAMFILES%\ActiveFax\Client\, %PROGRAMFILES%\ActiveFax\Install\ and %PROGRAMFILES%\ActiveFax\Terminal\. The folder permissions allow "Full Control" to "Everyone". An authenticated local attacker can exploit this to replace the TSClientB.exe binary in the Terminal directory, which is executed on logon for every user. Alternatively, the attacker can replace any of the binaries in the Client or Install directories. The latter requires additional user interaction, for example starting the client.
- LOW
- LOCAL
- HIGH
- UNCHANGED
- REQUIRED
- LOW
- HIGH
- HIGH
CWE-276 - Incorrect Default Permissions
During installation, installed file permissions are set to allow anyone to modify those files.
References
Advisory Timeline
- Published