CVE-2018-4343

HIGH

iPhone OS < 12.0 - Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-4343. PoCs published by bazad.

AI-analyzed exploit summary This PoC exploits a use-after-free vulnerability in the `com.apple.GSSCred` XPC service on macOS and iOS. By sending a crafted XPC message with identical source and destination UUIDs, it triggers a logic error in the `do_Move` function, leading to a crash or potential code execution.

Description

A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5.

Exploits (1)

nomisec WORKING POC 7 stars
by bazad · poc
https://github.com/bazad/gsscred-move-uaf

This PoC exploits a use-after-free vulnerability in the `com.apple.GSSCred` XPC service on macOS and iOS. By sending a crafted XPC message with identical source and destination UUIDs, it triggers a logic error in the `do_Move` function, leading to a crash or potential code execution.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: com.apple.GSSCred (macOS High Sierra 10.13.2 Beta 17C79a)
No auth needed
Prerequisites: Access to the `com.apple.GSSCred` XPC service
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Vendor Advisory x_refsource_misc
https://support.apple.com/kb/HT209107
Vendor Advisory x_refsource_misc
https://support.apple.com/kb/HT209106
Vendor Advisory x_refsource_misc
https://support.apple.com/kb/HT209139
Vendor Advisory x_refsource_misc
https://support.apple.com/kb/HT209108

Scores

CVSS v3 7.8
EPSS 0.0198
EPSS Percentile 77.9%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-119
Status published
Products (4)
apple/iphone_os < 12.0
apple/mac_os_x < 10.14
apple/tvos < 12
apple/watchos < 5.0
Published Apr 03, 2019
Tracked Since Feb 18, 2026