Feeds

MS releases grand daughter of all IE security patches

Critical patching time, again

  • alert
  • submit to reddit

SANS - Survey on application security programs

Microsoft released another cumulative patch for Internet Explorer yesterday, which promises to plug up six recently discovered security defects involving the browser.

The patch, for IE 5.01, 5.5 and 6.0, includes the functionality of previously released fixes, as well as tackling the new problems - the most serious of which could allow an attacker to run code of his choice on a victim's machine. Microsoft describes the patch as 'critical', so let's hope it works properly.

Six of the worst

The most serious bug involves a cross-site scripting vulnerability. IE ships with several files that contain HTML on the local file system, one of which contains a flaw that could allow a script to execute as if it were run by the user. This bug could be exploited by an attacker who tricks victims into either visiting a maliciously constructed Web page or opening HTML email containing a poisoned script.

Next up us is an information disclosure vulnerability related to a buggy HTML object, which is designed to provide support for Cascading Style Sheets. Because of the bug, an attacker might be able to read, but not delete or change, data on a local system, MS says.

Moving on, there's an information disclosure vulnerability involving to the handling of script within cookies, which could potentially allow one site to read the cookies of another.

Then there's a zone spoofing vulnerability that could allow a Web page to be incorrectly reckoned to be in the Intranet zone or, in some very rare cases, in the Trusted Sites zone.

Finally there are two variants of a 'content disposition' vulnerability, which relate to how IE handles downloads when a downloadable file's Content-Disposition and Content-Type headers are intentionally malformed. Virus writers might use the technique to disguise the fact that an attachment contains executable content, hence the need for the patch.

As well as plugging up the six vulnerabilities listed above, Microsoft's patch also disables frames in the Restricted Sites zone. The change means that recently released MS email clients (and those with Outlook Email Security Update installed) will disable frames in HTML email by default, blocking the possibility of an HTML email automatically opening a new window or launching the download of an executable. At least that's the idea.

You could read about the problems in more details, and get links to the relevant patch, in Microsoft's advisory on the subject. ®

Related Stories

MS issues monster IE security fix
MS releases mother of all IE security patches
Ditch IE - veteran bug hunter

High performance access to file storage

More from The Register

next story
Obama allows NSA to exploit 0-days: report
If the spooks say they need it, they get it
Samsung Galaxy S5 fingerprint scanner hacked in just 4 DAYS
Sammy's newbie cooked slower than iPhone, also costs more to build
Snowden-inspired crypto-email service Lavaboom launches
German service pays tribute to Lavabit
Mounties always get their man: Heartbleed 'hacker', 19, CUFFED
Canadian teen accused of raiding tax computers using OpenSSL bug
One year on: diplomatic fail as Chinese APT gangs get back to work
Mandiant says past 12 months shows Beijing won't call off its hackers
Call of Duty 'fragged using OpenSSL's Heartbleed exploit'
So it begins ... or maybe not, says one analyst
prev story

Whitepapers

Top three mobile application threats
Learn about three of the top mobile application security threats facing businesses today and recommendations on how to mitigate the risk.
Combat fraud and increase customer satisfaction
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Five 3D headsets to be won!
We were so impressed by the Durovis Dive headset we’ve asked the company to give some away to Reg readers.
SANS - Survey on application security programs
In this whitepaper learn about the state of application security programs and practices of 488 surveyed respondents, and discover how mature and effective these programs are.