Attacks/Breaches
11/5/2013
03:14 PM
Connect Directly
Google+
Twitter
RSS
E-Mail
50%
50%

Microsoft Warns Of Zero-Day Attacks Exploiting TIFF

'Fix it' released for protection until patch is prepared

Targeted attacks exploiting a zero-day flaw in the Microsoft Graphics component have been spotted in the wild hitting victims in the Middle East and South Asia.

Microsoft says the newly discovered remote code execution vulnerability, CVE-2013-3096, can be exploited via a malformed TIFF image. "Microsoft is investigating private reports of a vulnerability in the Microsoft Graphics component that affects Microsoft Windows, Microsoft Office, and Microsoft Lync. Microsoft is aware of targeted attacks that attempt to exploit this vulnerability in Microsoft Office products," the software company said in a security advisory issued today.

Bad guys can exploit the flaw that affects Windows, Office, and Lync by luring a victim into previewing or opening an email with a malicious file attachment or to visit a malicious URL. The end game is that the attacker can take over the machine. Microsoft has released a temporary Fix it patch for protection against attacks until it either issues a patch via its Patch Tuesday schedule or an out-of-band update.

"An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights," Microsoft says.

Microsoft says in the current attacks, the exploit requires a user to open the malicious Word attachment, which exploits the bug using a malicious TIFF image embedded in the document. The attack appears sophisticated in that it bypasses Microsoft's Data Execution Prevention and Address Space Layout Randomization mitigation defenses.

The flaw is in how Windows, Office, and Lync improperly handle "specially crafted" TIFF files, Microsoft says.

Users can install the temporary Fix it tool that blocks the attack, or employ Microsoft's Enhanced Mitigation Experience Toolkit (EMET), which can stop the attack, Elia Florio with Microsoft's Security Response Center engineering group said in a blog post today.

"The attacks observed are very limited and carefully carried out against selected computers, largely in the Middle East and South Asia," Florio wrote.

Wolfgang Kandek, CTO of Qualys, says the Fix it turns off TIFF rendering in the graphics library. "The listed software packages are not vulnerable under all conditions, so it is important that you take a look at your installed base and your possible exposure for the next couple of weeks into December," he advised in a blog post today. "Given the close date of the next Patch Tuesday for November, we don't believe that we can count on a patch arriving in time; we will probably have to wait until December, which makes your planning for a work-around even more important."

Microsoft's full security advisory on the new zero-day is here.

Have a comment on this story? Please click "Add Your Comment" below. If you'd like to contact Dark Reading's editors directly, send us a message.

Kelly Jackson Higgins is Executive Editor at DarkReading.com. She is an award-winning veteran technology and business journalist with more than two decades of experience in reporting and editing for various publications, including Network Computing, Secure Enterprise ... View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Tommy097
50%
50%
Tommy097,
User Rank: Apprentice
3/7/2014 | 7:35:44 AM
re: Microsoft Warns Of Zero-Day Attacks Exploiting TIFF
My work involves dealing with tiff a lot. Well I should have known better. Maybe it's time to swift to another format. I'm gonna convert them all to PDF.
http://www.yiigo.com/guides/vb...
Cale Dansbee
50%
50%
Cale Dansbee,
User Rank: Apprentice
11/6/2013 | 12:18:41 AM
re: Microsoft Warns Of Zero-Day Attacks Exploiting TIFF
Another example of guided cruise malware like Stuxnet???
Register for Dark Reading Newsletters
White Papers
Cartoon
Current Issue
Flash Poll
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2015-0986
Published: 2015-05-26
Multiple stack-based buffer overflows in Moxa VPort ActiveX SDK Plus before 2.8 allow remote attackers to insert assembly-code lines via vectors involving a regkey (1) set or (2) get command.

CVE-2015-3808
Published: 2015-05-26
The dissect_lbmr_pser function in epan/dissectors/packet-lbmr.c in the LBMR dissector in Wireshark 1.12.x before 1.12.5 does not reject a zero length, which allows remote attackers to cause a denial of service (infinite loop) via a crafted packet.

CVE-2015-3809
Published: 2015-05-26
The dissect_lbmr_pser function in epan/dissectors/packet-lbmr.c in the LBMR dissector in Wireshark 1.12.x before 1.12.5 does not properly track the current offset, which allows remote attackers to cause a denial of service (infinite loop) via a crafted packet.

CVE-2015-3810
Published: 2015-05-26
epan/dissectors/packet-websocket.c in the WebSocket dissector in Wireshark 1.12.x before 1.12.5 uses a recursive algorithm, which allows remote attackers to cause a denial of service (CPU consumption) via a crafted packet.

CVE-2015-3811
Published: 2015-05-26
epan/dissectors/packet-wcp.c in the WCP dissector in Wireshark 1.10.x before 1.10.14 and 1.12.x before 1.12.5 improperly refers to previously processed bytes, which allows remote attackers to cause a denial of service (application crash) via a crafted packet, a different vulnerability than CVE-2015-...

Dark Reading Radio
Archived Dark Reading Radio
Join security and risk expert John Pironti and Dark Reading Editor-in-Chief Tim Wilson for a live online discussion of the sea-changing shift in security strategy and the many ways it is affecting IT and business.