------------------------------------------------------------------------ LEADTOOLS ActiveX control multiple DLL side loading vulnerabilities ------------------------------------------------------------------------ Yorick Koster, September 2015 ------------------------------------------------------------------------ Abstract ------------------------------------------------------------------------ Multiple DLL side loading vulnerabilities were found in the LEADTOOLS ActiveX control. These issues can be exploited by loading various COM components as an embedded OLE object. When instantiating the object Windows will try to load the DLL LTANN11N.DLL from the current working directory. If an attacker convinces the user to open a specially crafted (Office) document from a directory also containing the attacker's DLL file, it is possible to execute arbitrary code with the privileges of the target user. This can potentially result in the attacker taking complete control of the affected system. ------------------------------------------------------------------------ Affected versions ------------------------------------------------------------------------ This issue was successfully verified on the HP Color LaserJet CM2320 MFP drivers version 3.1 (CM2320series-win7-full-solution-AM-EMEA1-v3.1.exe). ------------------------------------------------------------------------ Fix ------------------------------------------------------------------------ There is currently no fix available, HP reports: "Unfortunately, the driver software for these devices can no longer be updated. The devices have ended support life and the engineering resources are no longer available to provide any firmware updates. We do understand the issue, and current drivers are no longer vulnerable to the OLE side load issue". ------------------------------------------------------------------------ Details ------------------------------------------------------------------------ https://www.securify.nl/advisory/SFY20150901/leadtools_activex_control_multiple_dll_side_loading_vulnerabilities.html https://www.securify.nl/exploit/SFY20150901/hp_laserjet_ole_sideload.html https://www.securify.nl/blog/SFY20151201/there_s_a_party_in_ole__and_you_are_invited.html
