Sandbox escape via drag-and-drop use-after-free
Published Jan 8, 2021 · Updated Aug 3, 2024
Use-after-free in Google Chrome on Linux before 87.0.4280.141 allows remote attackers with a compromised renderer to escape the sandbox via crafted HTML. The drag-and-drop handler accesses memory after the associated object has been freed, creating a use-after-free condition during page interaction. Exploitation requires prior renderer compromise and a victim processing attacker-controlled HTML; the documented consequence is potential sandbox escape rather than a guaranteed host compromise.
Summary
What happened
Use-after-free in Google Chrome on Linux before 87.0.4280.141 allows remote attackers with a compromised renderer to escape the sandbox via crafted HTML. The drag-and-drop handler accesses memory after the associated object has been freed, creating a use-after-free condition during page interaction. Exploitation requires prior renderer compromise and a victim processing attacker-controlled HTML; the documented consequence is potential sandbox escape rather than a guaranteed host compromise.
The record
- CVE
- CVE-2021-21107
- Published
- Jan 8, 2021
- Updated
- Aug 3, 2024
- Vendor
- Google Cloud
- Product
- Google Chrome
- Classifications
- CWE-416, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 8, 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
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <87.0.4280.141
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.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo