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

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
I 'Hacked' My Accounts Using My Mobile Number: Here's What I Learned
Nicole Sette, Director in the Cyber Risk practice of Kroll, a division of Duff & Phelps,  11/19/2019
6 Top Nontechnical Degrees for Cybersecurity
Curtis Franklin Jr., Senior Editor at Dark Reading,  11/21/2019
Anatomy of a BEC Scam
Kelly Jackson Higgins, Executive Editor at Dark Reading,  11/21/2019
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Current Issue
Navigating the Deluge of Security Data
In this Tech Digest, Dark Reading shares the experiences of some top security practitioners as they navigate volumes of security data. We examine some examples of how enterprises can cull this data to find the clues they need.
Flash Poll
Rethinking Enterprise Data Defense
Rethinking Enterprise Data Defense
Frustrated with recurring intrusions and breaches, cybersecurity professionals are questioning some of the industrys conventional wisdom. Heres a look at what theyre thinking about.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2019-18610
PUBLISHED: 2019-11-22
An issue was discovered in manager.c in Sangoma Asterisk through 13.x, 16.x, 17.x and Certified Asterisk 13.21 through 13.21-cert4. A remote authenticated Asterisk Manager Interface (AMI) user without system authorization could use a specially crafted Originate AMI request to execute arbitrary syste...
CVE-2019-9536
PUBLISHED: 2019-11-22
Apple iPhone 3GS bootrom malloc implementation returns a non-NULL pointer when unable to allocate memory, aka 'alloc8'. An attacker with physical access to the device can install arbitrary firmware.
CVE-2013-6811
PUBLISHED: 2019-11-22
Multiple cross-site request forgery (CSRF) vulnerabilities in the D-Link DSL-6740U gateway (Rev. H1) allow remote attackers to hijack the authentication of administrators for requests that change administrator credentials or enable remote management services to (1) Custom Services in Port Forwarding...
CVE-2013-6880
PUBLISHED: 2019-11-22
Open redirect in proxy.php in FlashCanvas before 1.6 allows remote attackers to redirect users to arbitrary web sites and conduct cross-site scripting (XSS) attacks via the HTTP Referer header.
CVE-2019-15652
PUBLISHED: 2019-11-22
The web interface for NSSLGlobal SatLink VSAT Modem Unit (VMU) devices before 18.1.0 doesn't properly sanitize input for error messages, leading to the ability to inject client-side code.