Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Vulnerabilities / Threats

4/16/2015
12:30 PM
Connect Directly
Twitter
RSS
E-Mail
100%
0%

Microsoft Zero-Day Bug Being Exploited In The Wild

As attacks mount, and over 70 million websites remain vulnerable, advice is "fix now."

A critical remote code execution vulnerability affecting the Windows HTTP protocol stack is being actively exploited in the wild, according to the SANS Internet Storm Center. MS15-034 affects Windows 7, 8, and 8.1, Windows Server 2008 R2, 2012, and 2012 R2. It can be exploited by sending a specially crafted HTTP request to a vulnerable server.  

"The problem is that this will easily crash systems," says Johannes Ullrich, CTO of the SANS Internet Storm Center. "It is not a denial of service, and not easily a data leakage issue like Heartbleed. But even crashing millions of IIS servers could cause significant impact, as many large sites use IIS."

The good news is that this vulnerability was only introduced in relatively new IIS releases, so it does not impact sites that use Windows Server 2003. So, according to Netcraft's latest Web Server Survey, while more than 70 million websites could be vulnerable, the 130 million sites that run IIS on Server 2003 "would appear to be safe."

Microsoft patched the vulnerability Tuesday. Disabling IIS kernel caching would be a workaround, but would cause performance issues.

Ullrich confirms that the attacks hitting the SANS honeypots are indeed attackers, not just security researchers running tests. 

"These are real attackers, as they use the version of the exploit that will crash systems," Ullrich says. "The exploit used by researchers did not crash systems. There is currently remote code execution exploit in sight."

"We rated it the top bulletin this month," says Qualys CTO Wolfgang Kandek, "because the code is known to attackers already and it does not look to be very difficult [to exploit]. With Microsoft publishing the bulletin, the current owners of the exploit will most likely sell it off to as many interested parties as possible to get maximum benefit from its now limited lifespan. I continue to rank it as: 'Fix as quickly as possible.'"

Sara Peters is Senior Editor at Dark Reading and formerly the editor-in-chief of Enterprise Efficiency. Prior that she was senior editor for the Computer Security Institute, writing and speaking about virtualization, identity management, cybersecurity law, and a myriad ... View Full Bio
 

Recommended Reading:

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Commentary
Ransomware Is Not the Problem
Adam Shostack, Consultant, Entrepreneur, Technologist, Game Designer,  6/9/2021
Edge-DRsplash-11-edge-ask-the-experts
How Can I Test the Security of My Home-Office Employees' Routers?
John Bock, Senior Research Scientist,  6/7/2021
News
New Ransomware Group Claiming Connection to REvil Gang Surfaces
Jai Vijayan, Contributing Writer,  6/10/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win an Amazon Gift Card! Click Here
Latest Comment: Google's new See No Evil policy......
Current Issue
The State of Cybersecurity Incident Response
In this report learn how enterprises are building their incident response teams and processes, how they research potential compromises, how they respond to new breaches, and what tools and processes they use to remediate problems and improve their cyber defenses for the future.
Flash Poll
How Enterprises are Developing Secure Applications
How Enterprises are Developing Secure Applications
Recent breaches of third-party apps are driving many organizations to think harder about the security of their off-the-shelf software as they continue to move left in secure software development practices.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-20466
PUBLISHED: 2021-06-21
White Shark System (WSS) 1.3.2 is vulnerable to unauthorized access via user_edit_password.php, remote attackers can modify the password of any user.
CVE-2020-20467
PUBLISHED: 2021-06-21
White Shark System (WSS) 1.3.2 is vulnerable to sensitive information disclosure via default_task_add.php, remote attackers can exploit the vulnerability to create a task.
CVE-2020-20468
PUBLISHED: 2021-06-21
White Shark System (WSS) 1.3.2 is vulnerable to CSRF. Attackers can use the user_edit_password.php file to modify the user password.
CVE-2021-24368
PUBLISHED: 2021-06-20
The Quiz And Survey Master – Best Quiz, Exam and Survey Plugin WordPress plugin before 7.1.18 did not sanitise or escape its result_id parameter when displaying an existing quiz result page, leading to a reflected Cross-Site Scripting issue. This c...
CVE-2021-31664
PUBLISHED: 2021-06-18
RIOT-OS 2021.01 before commit 44741ff99f7a71df45420635b238b9c22093647a contains a buffer overflow which could allow attackers to obtain sensitive information.