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.

Threat Intelligence

11/12/2019
05:00 PM
Connect Directly
Twitter
LinkedIn
Google+
RSS
E-Mail
50%
50%

Microsoft Patches IE Zero-Day Among 74 Vulnerabilities

The November Patch Tuesday update fixed 13 critical flaws, including a zero-day bug in Internet Explorer.

Patch Tuesday is back once again, bringing with it 74 security fixes, 61 of which are classified as Important and 13 as Critical, including one Internet Explorer bug under active attack.

Microsoft today released fixes for CVEs across Windows, Internet Explorer, Microsoft Edge, Office and Office 365, ChakraCore, Exchange Server, Open Source Software, and Visual Studio.

The vulnerability currently being exploited in the wild is CVE-2019-1429, a scripting engine memory corruption vulnerability in Internet Explorer. A remote code execution flaw exists in the way the scripting engine handles objects in memory in IE, and it could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user.

Attackers who successfully exploited this vulnerability could gain the same user rights as the current user. If the user is logged in with administrator privileges, the attackers could exploit the vulnerability to take control of an affected system. From there, they could install programs; view, edit, or delete data; or create new accounts with full user rights.

To do this, the attackers could host a website designed to exploit the bug through Internet Explorer and convince the target to visit the site. Alternatively, they could embed an ActiveX control labeled "safe for initialization" within an app or Office document that hosts the IE rendering engine and trick someone into opening it. In the latter scenario, the victim wouldn't need to use IE to be infected, meaning they should patch even if they don't rely on the browser.

Today's patch fixes the flaw, reported by Clément Lecigne of Google's Threat Analysis Group, by changing the way the Internet Explorer scripting engine handles objects in memory.

"Security training on common phishing and user-targeted attack methods could further reduce the risk of this vulnerability being exploited, but as it is already being exploited in the wild, it is highly recommended to get the patch rolled out quickly to resolve the vulnerability completely," says Chris Goettl, director of security product management at Ivanti.

Microsoft also patched four Critical flaws (CVE-2019-1389, CVE-2019-1397, CVE-2019-1398, CVE-2019-0721) in Hyper-V and Hyper-V Network Switch. These would enable an authenticated user on a guest system to run potentially malicious code on the host. "Microsoft notes that exploitation of these vulnerabilities is less likely, but these patches should still be prioritized for all Hyper-V systems," says Jimmy Graham, director of product management at Qualys.

Today's roundup included a fix for CVE-2019-1457, a security feature bypass bug that exists in Office for Mac due to improper enforcement of macro settings in Excel files. To exploit this, an attacker would have to embed a control in an Excel worksheet that specifies a macro should be run, and then convince a user to open a specially crafted file with an affected version of Excel. This update fixes the vulnerability by enforcing macro settings on Excel documents.

Also worth noting is Microsoft's advisory ADV190024 on a vulnerability in certain Trusted Platform Module (TPM) chipsets from STMicroelectronics. This is a TPM firmware flaw, not a vulnerability in the Windows operating system or any specific application. The vulnerability affects key confidentiality in the ECDSA cipher; a firmware update to TPM may be needed.

"Currently no Windows systems use the vulnerable algorithm," Microsoft says. "Other software or services you are running might use this algorithm. Therefore if your system is affected and requires the installation of TPM firmware updates, you might need to re-enroll in security services you are running to remediate those affected services."

Related Content:

Check out The Edge, Dark Reading's new section for features, threat data, and in-depth perspectives. Today's top story: "Account Fraud Harder to Detect as Criminals Move from Bots to 'Sweat Shops'"

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
Mobile Banking Malware Up 50% in First Half of 2019
Kelly Sheridan, Staff Editor, Dark Reading,  1/17/2020
Active Directory Needs an Update: Here's Why
Raz Rafaeli, CEO and Co-Founder at Secret Double Octopus,  1/16/2020
New Attack Campaigns Suggest Emotet Threat Is Far From Over
Jai Vijayan, Contributing Writer,  1/16/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Current Issue
The Year in Security: 2019
This Tech Digest provides a wrap up and overview of the year's top cybersecurity news stories. It was a year of new twists on old threats, with fears of another WannaCry-type worm and of a possible botnet army of Wi-Fi routers. But 2019 also underscored the risk of firmware and trusted security tools harboring dangerous holes that cybercriminals and nation-state hackers could readily abuse. Read more.
Flash Poll
How Enterprises are Attacking the Cybersecurity Problem
How Enterprises are Attacking the Cybersecurity Problem
Organizations have invested in a sweeping array of security technologies to address challenges associated with the growing number of cybersecurity attacks. However, the complexity involved in managing these technologies is emerging as a major problem. Read this report to find out what your peers biggest security challenges are and the technologies they are using to address them.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-5216
PUBLISHED: 2020-01-23
In Secure Headers (RubyGem secure_headers), a directive injection vulnerability is present in versions before 3.9.0, 5.2.0, and 6.3.0. If user-supplied input was passed into append/override_content_security_policy_directives, a newline could be injected leading to limited header injection. Upon seei...
CVE-2020-5217
PUBLISHED: 2020-01-23
In Secure Headers (RubyGem secure_headers), a directive injection vulnerability is present in versions before 3.8.0, 5.1.0, and 6.2.0. If user-supplied input was passed into append/override_content_security_policy_directives, a semicolon could be injected leading to directive injection. This could b...
CVE-2020-5223
PUBLISHED: 2020-01-23
In PrivateBin versions 1.2.0 before 1.2.2, and 1.3.0 before 1.3.2, a persistent XSS attack is possible. Under certain conditions, a user provided attachment file name can inject HTML leading to a persistent Cross-site scripting (XSS) vulnerability. The vulnerability has been fixed in PrivateBin v1.3...
CVE-2019-20399
PUBLISHED: 2020-01-23
A timing vulnerability in the Scalar::check_overflow function in Parity libsecp256k1-rs before 0.3.1 potentially allows an attacker to leak information via a side-channel attack.
CVE-2020-7915
PUBLISHED: 2020-01-22
An issue was discovered on Eaton 5P 850 devices. The Ubicacion SAI field allows XSS attacks by an administrator.