External risk intelligence

Apple Web Content Code Execution Vulnerability.

CVE advisoryKnown Exploit

CVE-2022-42856

A type confusion vulnerability in Apple's WebKit allows arbitrary code execution via crafted web content. This impacts Safari and operating systems, potentially leading to system compromise. The risk to organizations includes unauthorized access and data impact, with reports of active exploitation.

4Halo Surface Signal

Apple Safari

before 16.2before 15.7.216.0 to before 16.1.2before 13.1

External exposure likelihood

Halo Surface Signal score for CVE-2022-42856

The vulnerability affects web browsers and operating system components that process web content. Since these applications are designed to fetch and render content from the public internet as a primary function, they are routinely exposed to externally reachable network traffic during normal user activity.

Horizon Alert

Summary of the vulnerability and why it matters

This vulnerability impacts Apple's Safari browser and operating systems. A flaw in how the system handles certain web content could allow for the execution of arbitrary code. This could lead to unauthorized access and control over affected systems.

  • Vulnerable to type confusion
  • Allows arbitrary code execution
  • Potential for system compromise

Attack Path

How an attacker could exploit the issue

This vulnerability allows attackers to execute arbitrary code by directing users to process maliciously crafted web content. An attacker could leverage this by tricking a user into visiting a compromised website or opening a malicious document. This could lead to unauthorized access and control over the affected system, potentially impacting business operations and data confidentiality.

  • Exposure condition: Publicly accessible web content.
  • Attacker starting point: Remote network access.
  • Trigger and result: Malicious content leads to code execution.

Live Threat

Current exploitation, exposure, and threat context

The organization faces a significant threat due to a type confusion vulnerability within Apple's WebKit browser engine. This vulnerability allows for arbitrary code execution when an organization's systems process maliciously crafted web content. It has been reported that this issue has been actively exploited in the wild, increasing the potential for widespread impact. Organizations should treat this vulnerability as urgent and prioritize patching affected systems.

  • Likely attacker skill: Moderate.
  • Required access: Visiting a malicious website.
  • Business risk: High; active exploitation reported.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability presents a significant risk as processing malicious web content can lead to unauthorized code execution. Organizations should prioritize identifying all affected assets, implementing measures to limit exposure, applying vendor-provided updates, and verifying successful remediation. Continuous monitoring for related activities is also recommended to ensure ongoing security.

  • Identify affected devices and software.
  • Reduce exposure by restricting web access.
  • Apply vendor fixes and validate.
  • Monitor for related security events.

Frequently asked questions

What is the nature of the CVE-2022-42856 vulnerability in Apple software?

CVE-2022-42856 is a type confusion vulnerability in Apple's WebKit, which can lead to arbitrary code execution when processing maliciously crafted web content. It affects Safari, iOS, iPadOS, macOS, and tvOS. This vulnerability has been classified as HIGH severity.

How can the CVE-2022-42856 vulnerability be exploited?

Exploitation of this vulnerability occurs when a user processes maliciously crafted web content. An attacker could trick a user into visiting a compromised website or opening a malicious document, leading to the execution of arbitrary code on the affected system.

What is the impact of CVE-2022-42856 on affected systems?

Successful exploitation of CVE-2022-42856 can result in arbitrary code execution. This could grant an attacker unauthorized access and control over the affected system, potentially leading to data breaches and business disruption.

What is the relevance of CVE-2022-42856, considering its active exploitation?

This vulnerability is highly relevant as it has reportedly been actively exploited against earlier versions of iOS. The CISA has included it in their Known Exploited Vulnerabilities (KEV) catalog, indicating a significant and immediate threat.

What steps should be taken to address CVE-2022-42856?

To address this vulnerability, organizations should identify all affected assets, limit exposure by restricting web access where possible, and promptly apply vendor-provided updates. Continuous monitoring for related security events is also recommended to ensure successful remediation and ongoing security.

References