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Adobe Captivate version 11.5.5 (and earlier) is affected by an Creation of Temporary File In Directory With Incorrect Permissions vulnerability that could result in privilege escalation in the context of the current user. The attacker must plant a malicious file in a particular location of the victim's machine. Exploitation of this issue requires user interaction in that a victim must launch the Captivate Installer.
CVSS 3.1 Base Score 5. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N).
CVSS 3.1 Base Score 7.3. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).
CVSS 2.0 Base Score 4.4. CVSS Attack Vector: local. CVSS Attack Complexity: medium. CVSS Vector: (AV:L/AC:M/Au:N/C:P/I:P/A:P).
In the following code examples a temporary file is created and written to and after using the temporary file the file is closed and deleted from the file system.
rmtmp();
return (-1);// write data to tmp fileHowever, within this C/C++ code the method tmpfile() is used to create and open the temp file. The tmpfile() method works the same way as the fopen() method would with read/write permission, allowing attackers to read potentially sensitive information contained in the temp file or modify the contents of the file.
}out.close();Similarly, the createTempFile() method used in the Java code creates a temp file that may be readable and writable to all users.
Additionally both methods used above place the file into a default directory. On UNIX systems the default directory is usually "/tmp" or "/var/tmp" and on Windows systems the default directory is usually "C:\\Windows\\Temp", which may be easily accessible to attackers, possibly enabling them to read and modify the contents of the temp file.
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