External risk intelligence

Apple WebKit Vulnerability May Disclose Sensitive Information.

CVE advisoryKnown Exploit

CVE-2023-42916

A WebKit vulnerability in Apple products may allow attackers to disclose sensitive information through specially crafted web content. This impacts organizations utilizing affected Apple software, potentially exposing confidential data and posing business risk. Remediation is advised.

4Halo Surface Signal

Out-of-bounds Read

Apple Safari

before 17.1.2before 15.8.116.0 to before 16.7.317.0 to before 17.1.214.0 to before 14.1.2383911.012.0before 2.42.3

External exposure likelihood

Halo Surface Signal score for CVE-2023-42916

This vulnerability affects WebKit, a core component used by Safari and various applications to render web content. Because web browsers and applications relying on WebKit are routinely used to access untrusted content on the public internet, the attack surface is considered commonly exposed.

Horizon Alert

Summary of the vulnerability and why it matters

A vulnerability in Apple's WebKit, the rendering engine for Safari and other applications, could allow for the disclosure of sensitive information. This flaw stems from an issue with how the component handles certain data. Organizations using affected software may face risks related to unauthorized access to confidential data.

  • Vulnerable web content processing
  • Out-of-bounds read flaw
  • Sensitive information disclosure

Attack Path

How an attacker could exploit the issue

An attacker can exploit this vulnerability by presenting specially crafted web content to a user. This content, when processed by the affected software, allows the attacker to read sensitive information from the system. This could potentially lead to unauthorized disclosure of data that is stored or processed by the affected organization's systems.

  • Exposure through web content
  • Attacker crafts malicious website
  • User accesses website, attacker gains control

Live Threat

Current exploitation, exposure, and threat context

This vulnerability presents a significant risk due to its potential for exploitation by various attackers. The disclosed information could be sensitive, impacting business operations. Apple has acknowledged reports of this issue being actively exploited, suggesting a high likelihood of real-world impact.

  • Attackers with general skills could exploit it.
  • No special access or conditions are required.
  • Business risk is high, suggesting urgent action.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

An organization should address this vulnerability to protect against the potential disclosure of sensitive information. The vulnerability allows for the potential exposure of information when processing specific web content. This could impact various systems that rely on WebKit for rendering web pages.

  • Identify affected systems and devices.
  • Isolate or mitigate exposure.
  • Apply vendor fixes and validate.
  • Monitor for related activity.

Frequently asked questions

What is Apple's WebKit and how does it process web content?

WebKit is the core rendering engine powering Apple's Safari browser and other applications on Apple devices. It interprets web code like HTML and CSS to display websites and online content accurately.

What is the weakness class for CVE-2023-42916 and what does it mean?

CVE-2023-42916 is classified as an out-of-bounds read (CWE-125). This occurs when software attempts to access data beyond its allocated memory buffer, potentially exposing sensitive information.

How can an attacker exploit CVE-2023-42916?

An attacker can exploit this vulnerability by presenting specially crafted web content to a user. When the affected software processes this content, it can lead to the disclosure of sensitive system information.

What is the relevance of CVE-2023-42916 according to the Halo Surface Signal?

The Halo Surface Signal indicates this vulnerability is 'Likely' exploitable because it affects WebKit, a fundamental component used by Safari and numerous applications for rendering web content. The common use of web browsers and WebKit-reliant applications to access untrusted internet content creates a broad attack surface.

What actions should be taken to address this vulnerability?

To mitigate risks, organizations should identify affected systems, isolate or reduce exposure, and apply vendor-provided updates. Validating the application of fixes and monitoring for related activities are also crucial steps.

References