Endpoint

7/27/2018
05:10 PM
Connect Directly
Twitter
Twitter
RSS
E-Mail
50%
50%

Automating Kernel Exploitation for Better Flaw Remediation

Black Hat researchers plan on open sourcing a new framework they say can help organizations get a better rein on vulnerability fixes for kernel bugs.

The explosive disclosure of the Spectre and Meltdown vulnerabilities were like a detonator on the already incendiary field of kernel vulnerabilities this year. Security researchers had previously been ramping up their exploration of kernel bugs, but this year the discoveries have mushroomed considerably.

As CISOs and security personnel seek to mitigate the risk of kernel-level attacks, they're going to need a better way to prioritize vulnerabilities for remediation. A group of researchers set to present at Black Hat USA in a couple of weeks are preparing to offer them a new exploit framework that they say can help security pros do exactly that. 

"Over the past eight months, Syzbot--an automated tool to identify kernel bugs and vulnerabilities--has flagged about 800 kernel bugs," explains Jimmy Su, who leads the JD security research center in Silicon Valley. "However, the Linux kernel community has limited manpower to patch these bugs quickly."

Together with academic researchers Wei Wu and Xinyu Xing of Penn State University, Su will present a new open source framework that they say can help security pros craft "powerful working exploits against arbitrary kernel vulnerabilities in a semi-automated fashion." 

Along with the unveiling of the framework, the trio plans on disclosing a number of working exploits against several kernel vulnerabilities—about half of which had not seen confirmed examples of exploitability in the past. 

"The exploit automation technique is a tool the community can use to quickly assess the exploitability of these bugs, allowing them to prioritize their remediation efforts based on the ease of exploitation," he says. "The goal is to patch kernel bugs with high risks in a timely fashion and reduce the amount of time Linux machines would remain vulnerable."  

While automated exploit generation is hardly a new thing, generating exploits for operating system kernel flaws is notoriously tricky due to complexity and scalability issues, Su and his compatriots say. The new framework they present uses kernel fuzzing and symbolic execution to prod flaws for exploitability under a number of different kernel panic contexts. It provides analysts with three major capabilities; It'll automate identification of system calls needed to exploit the vulnerability, it'll offer automated security mitigation bypassing, and it will automatically generate exploits with different objectives, such as privilege escalation or data leakage.  

Su believes that security teams should generally be leaning on exploit automation as a method for prioritizing vulnerability remediation.

"Every week, an enterprise might handle hundreds or even thousands of software bugs and most organizations don’t have sufficient manpower to sift through and patch these bugs rapidly," he says. "Exploitation automation techniques give an enterprise the ability to identify high-risk bugs and prioritize their remediation efforts accordingly." 

This holds true whether the issues are kernel flaws or not. 

"Though our research demonstrates exploit automation in the context of Linux kernel, our techniques can be generally applied to other daily software," he says. "As such, CISOs can use our technique to prioritize their remediation efforts (and scale) their software security for their daily operation."

Related Content:

 

 

 

 

Black Hat USA returns to Las Vegas with hands-on technical Trainings, cutting-edge Briefings, Arsenal open-source tool demonstrations, top-tier security solutions and service providers in the Business Hall. Click for information on the conference and to register.

Ericka Chickowski specializes in coverage of information technology and business innovation. She has focused on information security for the better part of a decade and regularly writes about the security industry as a contributor to Dark Reading.  View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Oldest First  |  Newest First  |  Threaded View
Higher Education: 15 Books to Help Cybersecurity Pros Be Better
Curtis Franklin Jr., Senior Editor at Dark Reading,  12/12/2018
'PowerSnitch' Hacks Androids via Power Banks
Kelly Jackson Higgins, Executive Editor at Dark Reading,  12/8/2018
Worst Password Blunders of 2018 Hit Organizations East and West
Curtis Franklin Jr., Senior Editor at Dark Reading,  12/12/2018
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win a Starbucks Card! Click Here
Latest Comment: This comment is waiting for review by our moderators.
Current Issue
10 Best Practices That Could Reshape Your IT Security Department
This Dark Reading Tech Digest, explores ten best practices that could reshape IT security departments.
Flash Poll
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2018-14623
PUBLISHED: 2018-12-14
A SQL injection flaw was found in katello's errata-related API. An authenticated remote attacker can craft input data to force a malformed SQL query to the backend database, which will leak internal IDs. This is issue is related to an incomplete fix for CVE-2016-3072. Version 3.10 and older is vulne...
CVE-2018-18093
PUBLISHED: 2018-12-14
Improper file permissions in the installer for Intel VTune Amplifier 2018 Update 3 and before may allow unprivileged user to potentially gain privileged access via local access.
CVE-2018-18096
PUBLISHED: 2018-12-14
Improper memory handling in Intel QuickAssist Technology for Linux (all versions) may allow an authenticated user to potentially enable a denial of service via local access.
CVE-2018-18097
PUBLISHED: 2018-12-14
Improper directory permissions in Intel Solid State Drive Toolbox before 3.5.7 may allow an authenticated user to potentially enable escalation of privilege via local access.
CVE-2018-3704
PUBLISHED: 2018-12-14
Improper directory permissions in the installer for the Intel Parallel Studio before 2019 Gold may allow authenticated users to potentially enable an escalation of privilege via local access.