CVE-2019-8622

HIGH

Apple iCloud < 7.12 - Memory Corruption via Malicious Web Content

Title source: llm

Exploitation Summary

EIP tracks 1 public exploit for CVE-2019-8622. PoCs published by Google Security Research.

AI-analyzed exploit summary This exploit demonstrates a use-after-free vulnerability in JavaScriptCore's DFG JIT compiler due to incorrect GC activity modeling. The PoC triggers an assertion failure in debug builds by causing an unexpected GC during a HasIndexedProperty operation on a String object with ArrayStorage.

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/46888

View Code ZIP pw:eip

This exploit demonstrates a use-after-free vulnerability in JavaScriptCore's DFG JIT compiler due to incorrect GC activity modeling. The PoC triggers an assertion failure in debug builds by causing an unexpected GC during a HasIndexedProperty operation on a String object with ArrayStorage.

Classification

Working Poc 100%

Attack Type

Dos

Complexity

Moderate

Reliability

Reliable

Target: WebKit JavaScriptCore (DFG JIT compiler)

No auth needed

Prerequisites: WebKit-based browser with JavaScriptCore (debug build)

MITRE ATT&CK