Process-memory disclosure via unchecked DataElement length
Published Jan 8, 2021 · Updated Aug 4, 2024
Out-of-bounds read in Google Chrome before 87.0.4280.88 allows remote attackers to disclose process memory through crafted HTML. DataElementDataView::ReadBuf accepts a BigBuffer without ensuring that its decoded size fulfills DataElement::length, allowing serialization to read beyond the buffer. Exploitation requires user interaction and prior compromise of Chrome's renderer process; the bounded consequence is disclosure of potentially sensitive process memory.
Summary
What happened
Out-of-bounds read in Google Chrome before 87.0.4280.88 allows remote attackers to disclose process memory through crafted HTML. DataElementDataView::ReadBuf accepts a BigBuffer without ensuring that its decoded size fulfills DataElement::length, allowing serialization to read beyond the buffer. Exploitation requires user interaction and prior compromise of Chrome's renderer process; the bounded consequence is disclosure of potentially sensitive process memory.
The record
- CVE
- CVE-2020-16041
- Published
- Jan 8, 2021
- Updated
- Aug 4, 2024
- Vendor
- Google Cloud
- Product
- Google Chrome
- Classifications
- CWE-125, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 8, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <87.0.4280.88
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- Samsung Browser full chain for CVE-2020-16040 and CVE-2020-16041functional · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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