CVE-2019-8660

CRITICAL

iPhone OS < 12.4 - Remote Code Execution via Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2019-8660. PoCs published by Google Security Research.

AI-analyzed exploit summary The exploit describes a memory corruption vulnerability in the decoding of NSKnownKeysDictionary1 objects, where an integer overflow during buffer allocation can lead to out-of-bounds writes. The PoC involves using Frida to inject a malicious payload into iMessage, but the actual exploit code is referenced externally.

Description

A memory corruption issue was addressed with improved input validation. This issue is fixed in iOS 12.4, macOS Mojave 10.14.6, tvOS 12.4, watchOS 5.3. A remote attacker may be able to cause unexpected application termination or arbitrary code execution.

Exploits (1)

exploitdb WRITEUP VERIFIED
by Google Security Research · textdosmultiple
https://www.exploit-db.com/exploits/47193

The exploit describes a memory corruption vulnerability in the decoding of NSKnownKeysDictionary1 objects, where an integer overflow during buffer allocation can lead to out-of-bounds writes. The PoC involves using Frida to inject a malicious payload into iMessage, but the actual exploit code is referenced externally.

Classification
Writeup 90%
Attack Type
Rce
Complexity
Complex
Reliability
Theoretical
Target: Apple iMessage (specific version not specified, likely iOS/macOS versions vulnerable to CVE-2019-8660)
No auth needed
Prerequisites: Frida installed · Target's phone number or email · Access to the target's iMessage
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Vendor Advisory x_refsource_misc
https://support.apple.com/HT210353
Vendor Advisory x_refsource_misc
https://support.apple.com/HT210346
Vendor Advisory x_refsource_misc
https://support.apple.com/HT210348
Vendor Advisory x_refsource_misc
https://support.apple.com/HT210351

Scores

CVSS v3 9.8
EPSS 0.1311
EPSS Percentile 95.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (4)
apple/iphone_os < 12.4
apple/mac_os_x < 10.14.6
apple/tvos < 12.4
apple/watchos < 5.3
Published Dec 18, 2019
Tracked Since Feb 18, 2026