Vulnerabilities / Threats

6/27/2017
05:44 PM
Connect Directly
Twitter
LinkedIn
Google+
RSS
E-Mail
50%
50%

Massive Skype Zero-Day Enables Remote Crashes

A security researcher uncovered a Skype vulnerability that could allow hackers to remotely execute code and crash software if exploited.

A critical vulnerability in Skype for Web could allow attackers to remotely execute code and crash systems. Microsoft has fixed the flaw, which remains a threat to anyone who has not updated their software.

Vulnerability Lab security researcher Benjamin Kunz Mejri discovered the zero-day vulnerability during a team conference call. It affects Skype versions 7.2, 7.35, and 7.36, and is considered a high-security risk with a 7.2 CVSS score.

Researchers state the stack buffer overflow flaw, CVE-2017-9948, has a "critical impact" to local and remote Skype users. Attackers can crash the software with a request to overwrite the register of the active software process. This lets them execute their own malicious code on affected and connected systems via Skype.

"The limitation of the transmitted size and count for images via print of the remote session clipboard has not secure limitation or restriction," Vulnerability Lab states. "Attackers are able to crash the software with one request to overwrite the eip register of the active software process."

This flaw affects the 'MSFTEDIT.DLL' dynamic link library of the Windows 8 (x86) operating system, researchers explain, and it is located in the "clipboard format" function of the Skype software. Attackers need only a low-privilege Skype account to launch a successful attack and do not need to interact with victims.

The vulnerability was reported to Microsoft's Security Response Center on May 16, and Microsoft issued a patch for the problem in Skype version 7.37 on June 8. Users are urged to update their software to avoid cyberattacks.

Related Content:

Kelly Sheridan is the Staff Editor at Dark Reading, where she focuses on cybersecurity news and analysis. She is a business technology journalist who previously reported for InformationWeek, where she covered Microsoft, and Insurance & Technology, where she covered financial ... View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Crowdsourced vs. Traditional Pen Testing
Alex Haynes, Chief Information Security Officer, CDL,  3/19/2019
BEC Scammer Pleads Guilty
Dark Reading Staff 3/20/2019
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win a Starbucks Card! Click Here
Latest Comment: Well, at least it isn't Mobby Dick!
Current Issue
5 Emerging Cyber Threats to Watch for in 2019
Online attackers are constantly developing new, innovative ways to break into the enterprise. This Dark Reading Tech Digest gives an in-depth look at five emerging attack trends and exploits your security team should look out for, along with helpful recommendations on how you can prevent your organization from falling victim.
Flash Poll
The State of Cyber Security Incident Response
The State of Cyber Security Incident Response
Organizations are responding to new threats with new processes for detecting and mitigating them. Here's a look at how the discipline of incident response is evolving.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2018-20165
PUBLISHED: 2019-03-22
Cross-site scripting (XSS) vulnerability in OpenText Portal 7.4.4 allows remote attackers to inject arbitrary web script or HTML via the vgnextoid parameter to a menuitem URI.
CVE-2019-1716
PUBLISHED: 2019-03-22
A vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone 7800 Series and Cisco IP Phone 8800 Series could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition or execute arbitrary code. The vulnerability ...
CVE-2019-1763
PUBLISHED: 2019-03-22
A vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone 8800 Series could allow an unauthenticated, remote attacker to bypass authorization, access critical services, and cause a denial of service (DoS) condition. The vulnerability exist...
CVE-2019-1764
PUBLISHED: 2019-03-22
A vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone 8800 Series could allow an unauthenticated, remote attacker to conduct a cross-site request forgery (CSRF) attack. The vulnerability is due to insufficient CSRF protections for the ...
CVE-2019-1765
PUBLISHED: 2019-03-22
A vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone 8800 Series could allow an authenticated, remote attacker to write arbitrary files to the filesystem. The vulnerability is due to insufficient input validation and file-level permis...