High-Tech Bridge Security Research Lab has discovered a vulnerability in Microsoft Windows which could be exploited to escalate privileges under certain conditions. The vulnerability exists due to the “IKE and AuthIP IPsec Keying Modules” system service, which tries to load the wlbsctrl.dll DLL that is missing after default Windows installation. Proof of concept included.
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Windows Escalate UAC Protection Bypass
This Metasploit module will bypass Windows UAC by utilizing the trusted publisher certificate through process injection. It will spawn a second shell that has the UAC flag turned off.
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Windows Escalate Service Permissions Local Privilege Escalation
This Metasploit module attempts to exploit existing administrative privileges to obtain a SYSTEM session. If directly creating a service fails, this module will inspect existing services to look for insecure file or configuration permissions that may be hijacked. It will then attempt to restart the replaced service to run the payload. This will result in a new session when this succeeds. If the module is able to modify the service but does not have permission to start and stop the affected service, the attacker must wait for the system to restart before a session will be created.
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Windows Service Trusted Path Privilege Escalation
This Metasploit module exploits a logic flaw due to how the lpApplicationName parameter is handled. When the lpApplicationName contains a space, the file name is ambiguous. Take this file path as example: C:\program files\hello.exe; The Windows API will try to interpret this as two possible paths: C:\program.exe, and C:\program files\hello.exe, and then execute all of them. To some software developers, this is an unexpected behavior, which becomes a security problem if an attacker is able to place a malicious executable in one of these unexpected paths, sometimes escalate privileges if run as SYSTEM. Some softwares such as OpenVPN 2.1.1, or OpenSSH Server 5, etc… all have the same problem.
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Windows Escalate Task Scheduler XML Privilege Escalation
This Metasploit module exploits the Task Scheduler 2.0 XML 0day exploited by Stuxnet. When processing task files, the Windows Task Scheduler only uses a CRC32 checksum to validate that the file has not been tampered with. Also, In a default configuration, normal users can read and write the task files that they have created. By modifying the task file and creating a CRC32 collision, an attacker can execute arbitrary commands with SYSTEM privileges.
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