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Insecure Library Loading
Highly critical

LINGO Insecure Library Loading Vulnerabilities

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Release Date:  2010-09-27    Last Update:  2012-09-10    Views:  3,823

Secunia Advisory SA41573

Where:

From remote

Impact:

System access

Solution Status:

Unpatched

CVE Reference(s):

Description


Some vulnerabilities have been discovered in LINGO, which can be exploited by malicious, local users to gain escalated privileges and by malicious people to compromise a user's system.

1) The application loads libraries (e.g. myuser.dll) in an insecure manner, which can be exploited to load arbitrary libraries by tricking a user into e.g. opening a LINGO document (.ltf) located on a remote WebDAV or SMB share.

Successful exploitation allows execution of arbitrary code.

2) The application is installed in a directory in the system root with insecure permissions by default (granting members of the "Users" group permissions to create files and directories). This can be exploited to execute arbitrary code with the privileges of another user running the application by placing e.g. a malicious library file in the installation directory.

NOTE: This is a general problem for the majority of Windows applications when installed outside the "Program Files" folder due to unsafe default permissions combined with the way libraries are located.

The vulnerabilities are confirmed in versions 11.0.1.6 and 12.0.2.20. Other versions may also be affected.


Solution:
Set secure permissions on the installation directory and do not open untrusted files.

Provided and/or discovered by:
APA-IUTcert Vulnerability Analysis Team

Additional information provided by Secunia Research.

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: LINGO Insecure Library Loading Vulnerabilities

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