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Showing posts with label vulnerability. Show all posts
Showing posts with label vulnerability. Show all posts

10 Dec 2014

Microsoft Releases Security Updates - Known Vulnerabilities patched

Last week Microsoft discharged its Advance Notification for the month of Dec 2014 Patch weekday Updates, and at last nowadays discharged a complete of seven security bulletins, which is able to address many vulnerabilities in its product, out of that 3 ar marked \'critical\' and rest ar \'important\' in severity.

Last month once a giant pile of security patches, the corporate discharged associate associate uncommon emergency patch to repair a vital vulnerability in Microsoft Windows Kerberos KBC, authentication system utilized by default within the package, that cybercriminals exploited to compromise whole networks of computers.
Microsoft_secutiry_vulnerability_patch

The 3 vital bulletins have an effect on net person, workplace and Windows. All the versions of Microsoft net person (IE) ar affected except Server Core, that doesn\'t embrace i.e.. The vital zero-day i.e. vulnerability (CVE-2014-8967) was discovered by security investigator Arthur Gerkis of Zero Day Initiative (ZDI) in Gregorian calendar month this year.

By exploiting the vulnerability, a far off aggressor might execute discretional code on vulnerable installations of Microsoft net person so as to compromise a vulnerable system. However, to use this flaw, user interaction is required and to try and do that the target user should visit a malicious page or open a malicious file.

"The vulnerability relates to however net person uses reference tally to manage the lifetimes of the in-memory objects representing hypertext mark-up language components,\" reads the ZDI post. \"By applying a CSS kind of display:run-in to a page and acting explicit manipulations, associate aggressor will cause associate object\'s reference count to fall to zero untimely, inflicting the item to be freed. net person can then continue mistreatment this object once it\'s been freed. associate aggressor will leverage this vulnerability to execute code underneath the context of the present method."
ZDI warned Microsoft many days agone concerning the unfinished public revelation of the flaw once it completed one hundred eighty days as on Gregorian calendar month 2014. All the versions of i.e. ar rated vital on Windows desktop systems and moderate on Windows servers. Windows RT versions are affected and also the vulnerability is rated vital on that.
A second vital patch update affects solely Windows visual percept, Windows 7, Windows Server 2003 and Windows Server 2008, that is rated vital for the desktop versions and moderate for the servers. Another vital remote code execution update is anticipated in Microsoft workplace, beginning with Microsoft Word 2007 SP three, likewise as Microsoft workplace a pair of010 SP 2, Word a pair of010 SP 2, Word 2013 and Word 2013 RT.

Moreover, 2 additional security bulletins patch remote code execution vulnerabilities in Microsoft workplace net apps 2010 and 2013, however those vulnerabilities ar rated vital, which implies that there\'s some mitigating factors for attackers to use the flaw.
An elevation of privilege bug in Microsoft Exchange is listed among different security bulletins and is rated vital. The code affected ar Microsoft Exchange 2007, 2010 and 2013. the ultimate security update fixes associate data revelation vulnerability all told versions of Windows, together with Server Core.
If you have got Automatic Updates enabled on your machine, these fixes can all be created offered via Windows Update and can be applied mechanically for many users. however just in case users haven\'t enabled it, Microsoft is encouraging them to use the updates promptly. Some patches applied might need restarting the servers likewise.

7 Aug 2014

FLICKR CROSS-SITE REQUEST FORGERY VULNERABILITY PATCHED

Yahoo-owned flickr


Yahoo-owned Flickr, one of the biggest online photo management and sharing website in the world was recently impacted by a web application vulnerability, which could allow an attacker to modify users’ profile image.
Flickr is one of the most popular photo sharing website with more than 87 billion users, therefore some top major target for cybercriminals. The site was vulnerable to the most common vulnerability known as Cross-Site Request Forgery (XSRF or CSRF), which is very easy to exploit by attackers.
Cross-Site Request Forgery is a method of attacking a Web site in which an intruder masquerades as a legitimate and trusted user. All the attacker need to do is get the target browser to make a request to your website on their behalf. If they can either:


  • Convince your users to click on a HTML page they’ve constructed
  • Insert arbitrary HTML in a target website that your users visit


Not too difficult, is it?
Abdullah Hussam, a 17 years old programmer from Iraq found that just by modifying parameters value of a Flickr HTTP request, one can trick the web service to modify users’ profiles.
When a user uploads a photo on Flickr, it will redirect the user to the page where they can add info on the photo like tags, description, and title. The request it make is as shown below:

edit_done=1&upload_ids=14401638983&just_photo_ids=&set_id=&magic_cookie=32e285e98bbef3aa6afd8c879891c01b&title_14401638983=XSRF+bug+POC1&description_14401638983=XSRF+bug+POC1&tags_14401638983=XSRF+POC1&tags_14401638983=XSRF+POC2&Submit=SAVE
According to Abdullah, the flaw resides in the “magic_cookie” parameter, which Flickr used to protect its website users from XSRF vulnerability.
In order to exploit Flickr XSRF vulnerability, an attacker can simply setup a webpage on his server with custom HTML form and custom parameter values, as shown. By keeping “magic_cookie” parameter value empty and changing Photo ID to the new image ID, the exploit will be able to bypass protection mechanism.
When the victim clicks a button on the web page, it generates a manipulated HTTP request to the server, which force the Flickr to replace victim’s profile image with new image.
The last thing I did it was delete the value of magic cookie, in the first try it failed but in the second it works!,” Abdullah told The Hacker News. “The all value (title, description, tags) got change and I got redirected to my photos.
He has also provided a video demonstration as a Proof of Concept:


The teen reported the vulnerability to Yahoo! and it was fixed in less than 12 hours by the Yahoo! security team. He got the reply from Yahoo! after more than a month and is still waiting for his bounty.Source : The Hacker News