Sensitive memory disclosure via uninitialized PDFium data
Published Apr 26, 2021 · Updated Aug 3, 2024
Information disclosure in Google Chrome before 90.0.4430.72 allows remote attackers to read process memory via crafted PDF files. PDFium returns uninitialized data while parsing attacker-supplied PDF content, exposing residual process-memory bytes to the document origin. Exploitation requires remote delivery of a PDF and user opening or viewing it; the demonstrated consequence is potentially sensitive information disclosure without reported integrity or availability impact.
Summary
What happened
Information disclosure in Google Chrome before 90.0.4430.72 allows remote attackers to read process memory via crafted PDF files. PDFium returns uninitialized data while parsing attacker-supplied PDF content, exposing residual process-memory bytes to the document origin. Exploitation requires remote delivery of a PDF and user opening or viewing it; the demonstrated consequence is potentially sensitive information disclosure without reported integrity or availability impact.
The record
- CVE
- CVE-2021-21219
- Published
- Apr 26, 2021
- Updated
- Aug 3, 2024
- Vendor
- Google Cloud
- Product
- Google Chrome
- Classifications
- CWE-200, T1005
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 26, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 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 <90.0.4430.72
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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