General discussion

VUNERABILITIES - February 18, 2005

TITLE:
Gaim Two Denial of Service Weaknesses

SECUNIA ADVISORY ID:
SA14322

VERIFY ADVISORY:
http://secunia.com/advisories/14322/

CRITICAL:
Not critical

IMPACT:
DoS

WHERE:
From remote

SOFTWARE:
Gaim 1.x
http://secunia.com/product/4107/

DESCRIPTION:
Two weaknesses have been reported in Gaim, which can be exploited by
malicious people to cause a DoS (Denial of Service).

1) An error within the parsing of received SNAC packets can be
exploited to cause a user's Gaim application to become unresponsive
when receiving specially crafted packets.

2) An error within the processing of HTML can be exploited to crash
the application when receiving specially crafted HTML.

SOLUTION:
Update to version 1.1.3.
http://gaim.sourceforge.net/downloads.php

PROVIDED AND/OR DISCOVERED BY:
Reported by vendor.

ORIGINAL ADVISORY:
http://gaim.sourceforge.net/security/index.php?id=10
http://gaim.sourceforge.net/security/index.php?id=11

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Yahoo! Messenger Audio Setup Wizard Privilege Escalation

Software: Yahoo! Messenger 5.x
Yahoo! Messenger 6.x

Secunia Research has discovered a vulnerability in Yahoo! Messenger, which can be exploited by malicious, local users to gain escalated privileges.

The vulnerability is caused due to a combination of weak default directory permissions and the Audio Setup Wizard (asw.dll) invoking the "ping.exe" utility insecurely during the connection testing phase. This can be exploited to execute arbitrary code with the privileges of another user by placing a malicious "ping.exe" file in the application's "Messenger" directory.

Successful exploitation requires that a user runs the Audio Setup Wizard and that the application has been installed in a non-default location (not as a subdirectory to the "Program Files" directory).

The vulnerability has been confirmed in version 6.0.0.1750 for Windows. Other versions may also be affected.

Solution: Update to version 6.0.0.1921 or later.
http://messenger.yahoo.com/

http://secunia.com/advisories/11815/

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Yahoo! Messenger File Transfer Filename Spoofing

Software: Yahoo! Messenger 6.x

Secunia Research has discovered a vulnerability in Yahoo! Messenger, which can be exploited by malicious people to trick users into executing malicious files.

The problem is that files with long filenames are not displayed correctly in the file transfer dialogs. This can be exploited to trick users into accepting and potentially executing malicious files.

Successful exploitation requires that the option "Hide extension for known file types" is enabled in Windows (default setting).

The vulnerability has been confirmed in version 6.0.0.1750. Other versions may also be affected.

Solution: Update to version 6.0.0.1921 or later.
http://messenger.yahoo.com/

http://secunia.com/advisories/13712/

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Microsoft ASP.NET Unicode Conversion Cross-Site Scripting

Software: ASP.NET 1.x
Microsoft .NET Framework 1.x

Andrey Rusyaev has discovered a vulnerability in ASP.NET, which potentially can be exploited by malicious people to conduct cross-site scripting and script insertion attacks.

The vulnerability is caused due to an input validation error in the filtration of special HTML characters supplied as unicode characters in the "Request Validation" and "HttpServerUtility.HtmlEncode" security mechanisms. This can e.g. be exploited to execute arbitrary HTML and script code in a user's browser session in context of a vulnerable site via a script returning user input without sanitation.

Successful exploitation requires that the response encoding has been set to a national ASCII codepage (not default setting).

The vulnerability has been confirmed in Microsoft .NET Framework version 1.1.4322.573. The vulnerability has also been reported in .Net Framework version 1.0 (service pack 2 and prior) and 1.1 (service pack 1 and prior).

Solution: Set the response encoding to unicode (default setting).

http://secunia.com/advisories/14214/

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Major Phishing Hole Found In IE and Outlook Express
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Internet Explorer Can Be Crashed With URL Containing Special

URL Characters

Version(s): Tested on 6.0 SP1

Description: ViPeR reported a vulnerability in Microsoft Internet Explorer. A remote user can cause the target user's browser to crash.

A remote user can create a specially HTML link containing certain characters that, when loaded by the target user, will cause the target user's browser to crash.

This flaw was discovered by Gregory R. Panakkal.

Impact: A remote user can create a URL that will cause the target user's browser to crash when the URL is loaded.

Solution: No solution was available at the time of this entry.

http://securitytracker.com/alerts/2005/Feb/1013205.html

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