Saturday, June 15, 2024

Memory Corruption Flaw in macOS Let Hackers run Malicious Code with Root Privileges

Security researchers discovered a double free vulnerability in macOS caused by memory corruption flaw in the AMD component. Successful exploitation of the vulnerability allows an attacker to escalate privilege and to run malicious code as a root user.

The vulnerability can be tracked as CVE-2019-8635, and it covers two flaws “namely in the discard_StretchTex2Tex method and processing of sideband tokens in an AMD Radeon class called AMDRadeonX400_AMDSIGLContext,”

discard_StretchTex2Tex and AMDRadeonX400_AMDSIGLContext are the derived classes of IOAccelGLContext2 which extend to IOAccelContext2 class, and the classes are used to render graphics on macOS machines.

“The vulnerability here occurs in the discard_StretchTex2Tex and AMDSIGLContext::process_StretchTex2Tex functions of the AMDRadeonX4000_AMDSIGLContext class, which can be accessed using the AMDRadeonX4000_AMDSIGLContext userclient with selector 2 function IOAccelContext2::submit_data_buffers, while the AMDRadeonX4000_AMDGraphicsAccelerator client can be opened with connect type 1”.

AMDRadeonX4000_AMDSIGLContext discard_StretchTex2Tex

The flaw is due to lack of validation of the data supplied from the user end, which allows an attacker to take advantage of this to escalate privileges to the kernel level. To execute the vulnerability, the local attacker should have the ability to run a low-privileged code on the target macOS system.

AMDRadeonX4000_AMDSIGLContext

The vulnerability resides in the processing of the sideband tokens that exist in the same AMD class; it allows a local attacker to execute arbitrary code on the affected versions of macOS.

To execute this vulnerability, a local attacker should have privileges to run a low-privileged code on the target system to take advantage of this vulnerability.

Trend Micro reported the flaw to Apple and patch has bee released. With the two flaws, the execution method remains the same but differs in the function taken advantage of. You can find the complete root cause analysis here.

An attacker could utilize the double free vulnerability to compromise the vulnerable machine; users are recommended to upgrade their OS X versions.

You can follow us on LinkedinTwitterFacebook for daily Cybersecurity updates also you can take the Best Cybersecurity courses online to keep yourself updated.

macOS Zero-Day Vulnerability Allows Hackers to Bypass Security Protections With Synthetic Clicks

Hackers Launching Unique Windows and MacOS Malware via Fake WhatsApp Official Website

Website

Latest articles

Sleepy Pickle Exploit Let Attackers Exploit ML Models And Attack End-Users

Hackers are targeting, attacking, and exploiting ML models. They want to hack into these...

SolarWinds Serv-U Vulnerability Let Attackers Access sensitive files

SolarWinds released a security advisory for addressing a Directory Traversal vulnerability which allows a...

Smishing Triad Hackers Attacking Online Banking, E-Commerce AND Payment Systems Customers

Hackers often attack online banking platforms, e-commerce portals, and payment systems for illicit purposes.Resecurity...

Threat Actor Claiming Leak Of 5 Million Ecuador’s Citizen Database

A threat actor has claimed responsibility for leaking the personal data of 5 million...

Ascension Hack Caused By an Employee Who Downloaded a Malicious File

Ascension, a leading healthcare provider, has made significant strides in its investigation and recovery...

AWS Announced Malware Detection Tool For S3 Buckets

Amazon Web Services (AWS) has announced the general availability of Amazon GuardDuty Malware Protection...

Hackers Exploiting MS Office Editor Vulnerability to Deploy Keylogger

Researchers have identified a sophisticated cyberattack orchestrated by the notorious Kimsuky threat group.The...
Guru baran
Guru baranhttps://gbhackers.com
Gurubaran is a co-founder of Cyber Security News and GBHackers On Security. He has 10+ years of experience as a Security Consultant, Editor, and Analyst in cybersecurity, technology, and communications.

Free Webinar

API Vulnerability Scanning

71% of the internet traffic comes from APIs so APIs have become soft targets for hackers.Securing APIs is a simple workflow provided you find API specific vulnerabilities and protect them.In the upcoming webinar, join Vivek Gopalan, VP of Products at Indusface as he takes you through the fundamentals of API vulnerability scanning..
Key takeaways include:

  • Scan API endpoints for OWASP API Top 10 vulnerabilities
  • Perform API penetration testing for business logic vulnerabilities
  • Prioritize the most critical vulnerabilities with AcuRisQ
  • Workflow automation for this entire process

Related Articles