CVE-2017-2521

HIGH

iPhone OS < 10.3.2, macOS < 10.12.5, tvOS < 10.2.1, watchOS < 3.2.2 - Remote Code Execution via WebKit Memory Corruption

Title source: llm

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-2521. PoCs published by Google Security Research.

AI-analyzed exploit summary This PoC exploits a vulnerability in JavaScriptCore's JSObject::ensureLength, where setPublicLength is called regardless of ensureLengthSlow's success, leading to an out-of-bounds (OOB) access. The code demonstrates the issue by manipulating array lengths and triggering the OOB condition.

Description

An issue was discovered in certain Apple products. iOS before 10.3.2 is affected. Safari before 10.1.1 is affected. tvOS before 10.2.1 is affected. watchOS before 3.2.2 is affected. The issue involves the "WebKit" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site.

Exploits (1)

exploitdb WORKING POC VERIFIED

by Google Security Research · javascriptdoslinux

https://www.exploit-db.com/exploits/42103

View Code ZIP pw:eip

This PoC exploits a vulnerability in JavaScriptCore's JSObject::ensureLength, where setPublicLength is called regardless of ensureLengthSlow's success, leading to an out-of-bounds (OOB) access. The code demonstrates the issue by manipulating array lengths and triggering the OOB condition.

Classification

Working Poc 95%

Attack Type

Dos

Complexity

Moderate

Reliability

Reliable

Target: WebKit JavaScriptCore (Safari)

No auth needed

Prerequisites: A vulnerable version of WebKit/JavaScriptCore

MITRE ATT&CK