External risk intelligence

Google Chrome Data Race Vulnerability

CVE advisoryKnown Exploit

CVE-2021-21166

A data race in Google Chrome's audio component may allow attackers to corrupt data. This could impact organizations by potentially exposing or altering sensitive information. The business risk involves threats to data integrity and confidentiality.

1Halo Surface Signal

Google Chrome

before 89.0.4389.7232333410.0

External exposure likelihood

Halo Surface Signal score for CVE-2021-21166

This vulnerability is located within the Google Chrome web browser. As a client-side application, the attack surface is local to the user's device and requires the user to interact with a crafted HTML page. It is not an internet-facing service, gateway, or network appliance, making it very unlikely to be exposed as an infrastructure-level network service.

Horizon Alert

Summary of the vulnerability and why it matters

A data race vulnerability in the audio component of Google Chrome can allow attackers to corrupt data. This flaw could potentially lead to unauthorized access or modification of sensitive information. Organizations using affected systems face risks to data integrity and confidentiality.

  • Vulnerable audio component
  • Data race flaw
  • Potential data corruption impact

Attack Path

How an attacker could exploit the issue

A remote attacker could exploit a data race vulnerability in the audio component of Google Chrome. This could allow for heap corruption through a specially crafted HTML page. The impact could include unauthorized access to or modification of data, or disruption of services.

  • Exposure via a crafted HTML page.
  • Attacker accesses via crafted HTML.
  • Trigger corrupts data and impacts systems.

Live Threat

Current exploitation, exposure, and threat context

A vulnerability in Google Chrome could allow attackers to corrupt memory, potentially leading to system compromise. This type of vulnerability can be exploited through malicious web pages that users may encounter. Organizations should consider the potential impact on their systems and employee data.

  • Likely attacker skill level: Intermediate
  • Required access or conditions: User interaction with a malicious page
  • Business risk or urgency: Significant

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

A data race vulnerability in Google Chrome could allow a remote attacker to exploit heap corruption through a crafted HTML page. This impacts organizations that use affected versions of the Chrome browser. The vulnerability has been documented and is considered a high-severity issue. Organizations should prioritize addressing this risk to protect their systems and data.

  • Find affected Chrome assets.
  • Reduce exposure or isolate risk.
  • Fix, verify, and monitor.

Frequently asked questions

What is the nature of the security vulnerability in Google Chrome?

Google Chrome has a data race vulnerability in its audio component. This flaw, identified as CVE-2021-21166, could allow a remote attacker to exploit heap corruption by presenting a crafted HTML page to a user. This could lead to unauthorized access, modification of data, or service disruption.

How can the Google Chrome vulnerability be exploited, and what is the weakness class?

The vulnerability, a data race in the audio component of Google Chrome, can be exploited by a remote attacker via a crafted HTML page. This leads to heap corruption. The weakness class is CWE-362, also known as a "concurrent execution of critical code" or race condition.

What is the trigger path for this vulnerability, and does it involve scope negation?

The vulnerability is triggered when a user interacts with a crafted HTML page. This crafted page, when loaded in a vulnerable version of Google Chrome, can exploit a data race in the audio component. The context does not explicitly mention scope negation.

How relevant is the Halo Surface Signal for this vulnerability?

The Halo Surface Signal indicates this vulnerability is 'Very unlikely' to be exposed as an infrastructure-level network service. This is because it's a client-side application vulnerability requiring user interaction with a crafted HTML page, not an internet-facing service.

What are the practical steps for responding to this vulnerability?

To respond, organizations should identify affected Google Chrome assets. Mitigation involves reducing exposure or isolating risk, and the primary fix is to apply updates per vendor instructions. After applying fixes, it is important to verify the remediation and monitor systems.

References