CVSS 8.8 HIGH Bulletin: Apple Security Advisory HT213928 Published: 2023-09-21

CVE-2023-41993: Apple WebKit Arbitrary Code Execution Vulnerability (Predator Spyware)

Technical intelligence and weaponization dossier for CVE-2023-41993. Documented exploitation across 1 active malware families totaling 120 analyzed telemetry samples.

Attributed Families
1
Sample Volume
120
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Official NIST NVD
View NVD Record →

Vulnerability Specifications & Root Cause

Vulnerability ID CVE-2023-41993
Common Name / Bulletin Apple WebKit Arbitrary Code Execution Vulnerability (Predator Spyware) (Apple Security Advisory HT213928)
CWE Classification CWE-94: Improper Control of Generation of Code in WebKit
Affected Software & Versions iOS before 16.7, iOS 17 before 17.0.1, macOS Ventura before 13.6, Safari before 16.6.1
Technical Root Cause Memory corruption vulnerability in the WebKit browser engine permitting remote arbitrary code execution when rendering maliciously crafted web content, delivered via targeted SMS phishing lures by Predator spyware operators.
Associated ATT&CK Techniques
  • T1189 — Associated ATT&CK Technique
  • T1203 — Associated ATT&CK Technique
  • T1404 — Associated ATT&CK Technique

Malware Families Weaponizing CVE-2023-41993

Empirical catalog telemetry verifies that the following 1 malware families weaponize this vulnerability for initial access, privilege escalation, or lateral movement:

1 families
Malware Family Category Catalog Samples Operational Profile
predatorSpyware120Predator is a premier commercial zero-day mercenary spyware platform engineered by Cytrox (part of the European surveillance consortium known as the Intellexa A...

Attributed Threat Actors & Syndicates

Threat intelligence confirms the following adversaries weaponize CVE-2023-41993 in enterprise intrusions and campaign toolkits:

SOC Detection & Threat Hunting Guidance

Threat hunting leads and behavioral telemetry patterns to identify weaponized exploitation of CVE-2023-41993 in enterprise networks:

Safari or webkit web content crashes with SIGSEGV/SIGBUS accompanied by outbound telemetry connections to suspected Cytrox reverse-proxy domain infrastructure.

Remediation & Defensive Hardening

SOC containment checklist and attack surface reduction measures to neutralize exploitation:

Actionable Guidance: Upgrade Apple Safari, iOS, and macOS releases; enable Lockdown Mode to deactivate JIT compilers and high-risk WebKit parsers.

For end-to-end incident response procedures, consult our dedicated playbook: InfoStealer Protection & Remediation →

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