CVE-2021-21148 vulnerability in Google and Other Products
Published on February 9, 2021
Known Exploited Vulnerability
This Chromium V8 JavaScript Rendering Engine Heap Buffer Overflow Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Heap buffer overflow in V8 in Google Chrome prior to 88.0.4324.150 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
The following remediation steps are recommended / required by November 17, 2021: Apply updates per vendor instructions.
Vulnerability Analysis
CVE-2021-21148 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2021-21148 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2021-21148
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Affected Versions
Google Chrome:- Version unspecified and below 88.0.4324.150 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.