What We Do
How we do it
Resources
SECURITY ADVISORIES
Oct 19, 2021
Hackers Infect Employees of Law Firms, Manufacturing Companies, and Financial Services Orgs. with Increasingly Pervasive Infostealer, SolarMarker
SolarMarker Infects 5X More Corporate Victims Using Over a Million Poisoned WordPress Pages Key Takeaways eSentire has observed a fivefold increase in SolarMarker infections. Prior to September, eSentire’s Threat Response Unit (TRU) detected and shut down one infection per week. Beginning in September, TRU averaged the detection and shutdown of five per week. SolarMarker is a…
Read More
View all Advisories →
Company
ABOUT eSENTIRE
About Us
eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 1000+ organizations in 70+ countries from known and unknown cyber threats. Founded in 2001, the company’s mission is to hunt, investigate and stop cyber threats before they become business disrupting events.
Read about how we got here
Leadership Work at eSentire
LATEST PRESS RELEASE
Oct 12, 2021
eSentire Launches MDR with Microsoft Azure Sentinel Extending Response Capabilities Across Entire Microsoft Security Ecosystem
Waterloo, ON – Oct. 12, 2021 -- eSentire, recognized globally as the Authority in Managed Detection and Response (MDR), today announced the expansion of its award-winning MDR services with Microsoft Azure Sentinel, as part of its integration with the complete Microsoft 365 Defender and Azure Defender product suites supporting Microsoft SIEM, endpoint, identity, email and cloud security services.…
Read More
Partners
PARTNER PROGRAM
Partners
Our award-winning partner program offers financial rewards, sales and marketing tools and personalized training. Accelerate your business and grow your revenue by offering our world-class Managed Detection and Response (MDR) services.
Learn about our Partner Program
PARTNER RESOURCES
Apply today to partner with the Authority in Managed Detection and Response.
Login to the Partner Portal for resources and content for current partners.
Search
Resources
Security advisories — Feb 27, 2019

Microsoft Jet Database Remote Code Execution

A vulnerability affecting all versions of Windows was publicly released on September 20th [1]. If exploited, this vulnerability could allow an unauthenticated attacker to perform remote code execution on vulnerable systems. The cause of the vulnerability is found in the Microsoft JET Database Engine, which allows threat actors to perform an out-of-bounds write. There is a medium-high confidence rating that threat actors will act to quickly weaponize this vulnerability as Microsoft has not released a security patch and Proof-of-Concept code has been made publicly available [2].

What we’re doing about it

What you should do about it

Additional information

In an attack scenario, a threat actor would send a maliciously crafted file with data stored in the JET database format or add the malicious document to a compromised website. If the attachment is opened the malicious file will execute [3].The Microsoft JET Database Engine can be exploited due to an issue with index management to cause an out-of-bounds write; this is when data is written past the end or before the beginning of the intended buffer. Out-of-bound writes can result in data corruption, software crashes or code execution.

The Jet Database Remote Code Execution vulnerability was publicly disclosed before security patching due to a 120-day notification deadline not being met. The vulnerability was initially reported to Microsoft on May 8th and the development of a security patch is reported as ongoing.


References:

[1] (0Day) Microsoft Windows Jet Database Engine Out-Of-Bounds Write Remote Code Execution Vulnerability
https://www.zerodayinitiative.com/advisories/ZDI-18-1075/

[2] ZDI-CAN-6135: A REMOTE CODE EXECUTION VULNERABILITY IN THE MICROSOFT WINDOWS JET DATABASE ENGINE
https://github.com/thezdi/PoC/tree/master/ZDI-18-1075

[3] ZDI-CAN-6135: A REMOTE CODE EXECUTION VULNERABILITY IN THE MICROSOFT WINDOWS JET DATABASE ENGINE
https://www.thezdi.com/blog/2018/9/20/zdi-can-6135-a-remote-code-execution-vulnerability-in-the-microsoft-windows-jet-database-engine