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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.

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ActFax 安全漏洞

ActFax是奥地利ActiveFax的一款传真服务器软件。ActiveFax可以使你的电脑变成一个虚拟的传真机，实现在Windows和UNIX的应用软件中随意传送传真与Email，适合各种规模的网络及单机使用。 ActFax 7.10版本中存在安全漏洞，该漏洞源于文件夹权限不安全，该漏洞允许攻击者可以替换Client或Install目录中的任何二进制文件。

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