CVE-2021-21166

CVE Published	2021-03-09
Related CWE(s)	CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Related Vendor(s)	fedoraproject, debian, google
Related Product(s)	fedora, chrome, debian_linux
Exploitation Reported (CISA KEV)	2021-11-03
CVSS 3 Base Score	8.8 (HIGH)
CVSS 3 Attack Complexity	LOW
CVSS 3 Attack Vector	NETWORK

Data race in audio in Google Chrome prior to 89.0.4389.72 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Cyber Threat Graph Context

Explore how this CVE relates to the wider threat graph

Associated CAPEC Patterns

Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions (CAPEC-29)

This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. A typical example is file access. The adversary can leverage a file access race condition by "running the race", meaning that they would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the adversary could replace or modify the file, causing the application to behave unexpectedly.

Leveraging Race Conditions (CAPEC-26)

The adversary targets a race condition occurring when multiple processes access and manipulate the same resource concurrently, and the outcome of the execution depends on the particular order in which the access takes place. The adversary can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance, a race condition can occur while accessing a file: the adversary can trick the system by replacing the original file with their version and cause the system to read the malicious file.

References

CVE.org

View more information about CVE-2021-21166 on the official MITRE CVE website.

NIST National Vulnerability Database

CVE-2021-21166 on the NIST NVD.

CISA Known Exploited Vulnerabilities