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Insecure Library Loading
Highly critical

Qt Insecure Library Loading and Buffer Overflow Vulnerabilities

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Release Date:  2010-09-21    Last Update:  2012-06-20    Views:  5,566

Secunia Advisory SA41537

Where:

From remote

Impact:

System access

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


Two vulnerabilities have been reported in Qt, which can be exploited by malicious people to compromise an application using the library.

1) An error due to the "QLibrary::resolve()" method in QtCore4.dll loading libraries (e.g. wintab32.dll and dwmapi.dll in QtGui4.dll) in an insecure manner can be exploited to load arbitrary libraries when an application using this library e.g. opens a file located on a remote WebDAV or SMB share.

Successful exploitation of this vulnerability allows execution of arbitrary code.

This vulnerability is confirmed in version 4.6.3. Other versions may also be affected.

2) An error in the harfbuzz module (src/3rdparty/harfbuzz/src/harfbuzz-gpos.c) when processing certain fonts can be exploited to cause a buffer overflow.

Successful exploitation of this vulnerability may allow execution of arbitrary code.


Solution:
Update to version 4.7.4.

Provided and/or discovered by:
1) Reported by various people in a number of applications bundling vulnerable versions of Qt.
2) Disclosed in a Git commit.

Original Advisory:
Git commit:
https://qt.gitorious.org/qt/qt/commit/9ae6f2f9a57f0c3096d5785913e437953fa6775c

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: Qt Insecure Library Loading and Buffer Overflow Vulnerabilities

User Message
matt.oakland RE: Qt Insecure Library Loading Vulnerability
Member 2nd Sep, 2011 18:02
Score: 0
Posts: 1
User Since: 2nd Sep 2011
System Score: N/A
Location: US
Last edited on 2nd Sep, 2011 18:02
I'm not positive about this (because this advisory is a little vague), but I think this is fixed/patched and documented on the vendor's website: http://qt.nokia.com/about/news/security-announceme...
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