Yahoo Patches IM Vulnerability

April 6, 2007
Yahoo logo

A buffer overflow problem is patched by the company.

Yahoo has patched a buffer overflow vulnerability in its instant-messaging tool that would have enabled attackers to potentially execute code on a compromised machine.

The flaw exists in an ActiveX control that is part of the Yahoo Messenger audio conference control. If exploited, a buffer overflow could cause a user to be involuntarily logged out of a chat or instant messaging session, the crash of an application such as Internet Explorer or the execution of code.

According to the company, an attacker would have to trick a user into viewing malicious HTML code in order for the attack to be successful.

Andrew Storms, director of security operations for San Francisco-based nCircle, said addressing the vulnerability could pose a problem in large corporate environments where Yahoo Messenger is widely used.

"Yahoo IM is heavily used in the corporate environment even if security policy doesn't officially permit it," he said. " - This vulnerability - leaves administrators with the choices to upgrade or set the kill-bit on the affected ActiveX control. Unfortunately, many corporations are unable to centrally manage upgrades - to - Windows Messenger, making this fix extremely time-intensive for IT teams. Many companies will be performing ad-hoc mitigation to get this cleaned up."

Yahoo advises anyone who has installed Yahoo Messenger before March 13 to install the update.

Copyright 2007 by Ziff Davis Media, Distributed by United Press International

Explore further: Indian government wakes up to risk of Hotmail, Gmail

Related Stories

Indian government wakes up to risk of Hotmail, Gmail

December 8, 2013

Worried by US spying revelations, India has begun drawing up a new email policy to help secure government communications, but the man responsible for drafting the rules still regularly uses Hotmail.

Security holes in smartphone apps (w/ Videos)

April 17, 2013

(Phys.org) —Popular texting, messaging and microblog apps developed for the Android smartphone have security flaws that could expose private information or allow forged fraudulent messages to be posted, according to researchers ...

Recommended for you

Microsoft describes hard-to-mimic authentication gesture

August 1, 2015

Photos. Messages. Bank account codes. And so much more—sit on a person's mobile device, and the question is, how to secure them without having to depend on lengthy password codes of letters and numbers. Vendors promoting ...

Power grid forecasting tool reduces costly errors

July 30, 2015

Accurately forecasting future electricity needs is tricky, with sudden weather changes and other variables impacting projections minute by minute. Errors can have grave repercussions, from blackouts to high market costs. ...

Netherlands bank customers can get vocal on payments

August 1, 2015

Are some people fed up with remembering and using passwords and PINs to make it though the day? Those who have had enough would prefer to do without them. For mobile tasks that involve banking, though, it is obvious that ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.