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.

Attacks/Breaches

8/19/2015
11:30 AM
Sara Peters
Sara Peters
Quick Hits
Connect Directly
Twitter
RSS
E-Mail
50%
50%

IE Bug Exploited In Wild After Microsoft Releases Out-Of-Band Patch

Remote code execution vulnerability in Internet Explorer versions 7 through 11 being used to drop PlugX RAT.

A critical memory corruption vulnerability in Internet Explorer versions 7 through 11 that Microsoft released an emergency patch for yesterday is being used in watering hole and spearphishing attacks. Successful exploitation enables remote code execution and grants the attacker the same privileges as the current user.

The vulnerability, CVE-2015-2502, is a memory corruption bug, exploited by a hacker either hosting a malicious website or running malicious content on a legitimate site.

The attack seen in the wild has been using a malicious IFrame and drops a variant of the PlugX remote access Trojan, which calls a command-and-control server based in Korea, according to Heimdal Security.

“The recently exposed flaw does allow remote code execution so it is in a class that is pretty serious," says Cris Thomas, strategist at Tenable Network Security. "The key here though, and the reason why Microsoft issued an out-of-band patch, isn't because this bug is super bad, but because bad guys are using this bug right now to break into people’s systems. However, Microsoft hasn't released any information with regards to how extensive that usage is. It is possible that this issue is only being used in selective, highly targeted attacks or it could be in widespread use on a botnet or third party web advertising network.

"Unfortunately, there are no work-arounds for this bug. Ensuring that you have Microsoft's Enhanced Mitigation Experience Toolkit configured will make exploiting this bug more difficult, but not impossible."  

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
NSA Appoints Rob Joyce as Cyber Director
Dark Reading Staff 1/15/2021
Vulnerability Management Has a Data Problem
Tal Morgenstern, Co-Founder & Chief Product Officer, Vulcan Cyber,  1/14/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
2020: The Year in Security
Download this Tech Digest for a look at the biggest security stories that - so far - have shaped a very strange and stressful year.
Flash Poll
Assessing Cybersecurity Risk in Today's Enterprises
Assessing Cybersecurity Risk in Today's Enterprises
COVID-19 has created a new IT paradigm in the enterprise -- and a new level of cybersecurity risk. This report offers a look at how enterprises are assessing and managing cyber-risk under the new normal.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-20949
PUBLISHED: 2021-01-20
Bleichenbacher's attack on PKCS #1 v1.5 padding for RSA in STM32 cryptographic firmware library software expansion for STM32Cube (UM1924). The vulnerability can allow one to use Bleichenbacher's oracle attack to decrypt an encrypted ciphertext by making successive queries to the server using the vul...
CVE-2020-25683
PUBLISHED: 2021-01-20
A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. A remote attacker, who can create valid DNS replies, could use this flaw to cause an overflow in a heap-allocated memory. T...
CVE-2020-25684
PUBLISHED: 2021-01-20
A flaw was found in dnsmasq before version 2.83. When getting a reply from a forwarded query, dnsmasq checks in the forward.c:reply_query() if the reply destination address/port is used by the pending forwarded queries. However, it does not use the address/port to retrieve the exact forwarded query,...
CVE-2020-25685
PUBLISHED: 2021-01-20
A flaw was found in dnsmasq before version 2.83. When getting a reply from a forwarded query, dnsmasq checks in forward.c:reply_query(), which is the forwarded query that matches the reply, by only using a weak hash of the query name. Due to the weak hash (CRC32 when dnsmasq is compiled without DNSS...
CVE-2020-35271
PUBLISHED: 2021-01-20
Employee Performance Evaluation System in PHP/MySQLi with Source Code 1.0 is affected by cross-site scripting (XSS) in the Employees, First Name and Last Name fields.