CVE-2019-8623

HIGH

Apple iCloud < 7.12 - Memory Corruption via Malicious Web Content

Title source: llm

Exploitation Summary

EIP tracks 1 public exploit for CVE-2019-8623. PoCs published by Google Security Research.

AI-analyzed exploit summary This exploit demonstrates a JavaScriptCore JIT optimization bug (CVE-2019-8623) where Loop-Invariant Code Motion (LICM) incorrectly moves memory reads before writes due to misanalysis of dead code, leading to uninitialized stack memory access and potential arbitrary memory corruption.

Description

Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 12.3, macOS Mojave 10.14.5, tvOS 12.3, watchOS 5.2.1, Safari 12.1.1, iTunes for Windows 12.9.5, iCloud for Windows 7.12. Processing maliciously crafted web content may lead to arbitrary code execution.

Exploits (1)

exploitdb WORKING POC VERIFIED

by Google Security Research · textdosmultiple

https://www.exploit-db.com/exploits/46889

View Code ZIP pw:eip

This exploit demonstrates a JavaScriptCore JIT optimization bug (CVE-2019-8623) where Loop-Invariant Code Motion (LICM) incorrectly moves memory reads before writes due to misanalysis of dead code, leading to uninitialized stack memory access and potential arbitrary memory corruption.

Classification

Working Poc 95%

Attack Type

Rce

Complexity

Complex

Reliability

Reliable

Target: WebKit JavaScriptCore (JSC) in Safari and other WebKit-based browsers

No auth needed

Prerequisites: Target must execute the JavaScript code in a WebKit-based environment with JIT enabled

MITRE ATT&CK