Sandbox escape via out-of-bounds IPC read
Published Apr 9, 2021 · Updated Aug 3, 2024
An out-of-bounds read in Google Chrome IPC before 89.0.4389.114 allows remote attackers to escape the browser sandbox via crafted HTML. The IPC component reads beyond an allocated buffer while handling attacker-controlled interprocess data; Google has not disclosed the affected function or message type. The prerequisite is user interaction and prior renderer compromise; successful exploitation escapes the renderer sandbox, while further post-escape actions are undisclosed.
Summary
What happened
An out-of-bounds read in Google Chrome IPC before 89.0.4389.114 allows remote attackers to escape the browser sandbox via crafted HTML. The IPC component reads beyond an allocated buffer while handling attacker-controlled interprocess data; Google has not disclosed the affected function or message type. The prerequisite is user interaction and prior renderer compromise; successful exploitation escapes the renderer sandbox, while further post-escape actions are undisclosed.
The record
- CVE
- CVE-2021-21198
- Published
- Apr 9, 2021
- Updated
- Aug 3, 2024
- Vendor
- Google Cloud
- Product
- Google Chrome
- Classifications
- CWE-125, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 9, 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 <89.0.4389.114
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
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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