Remote information disclosure via undersized bark lookup table
Published Dec 15, 2021 · Updated Aug 3, 2024
Out-of-bounds read in Android 12's Tremolo Vorbis decoder allows remote attackers to disclose memory through crafted audio input. The toBARK function accepts values up to 32767, but its barklook table covered only values through 31004, causing an index to read past the table. Exploitation requires user interaction but no execution privileges; the documented consequence is memory disclosure, with no integrity or availability impact.
Summary
What happened
Out-of-bounds read in Android 12's Tremolo Vorbis decoder allows remote attackers to disclose memory through crafted audio input. The toBARK function accepts values up to 32767, but its barklook table covered only values through 31004, causing an index to read past the table. Exploitation requires user interaction but no execution privileges; the documented consequence is memory disclosure, with no integrity or availability impact.
The record
- CVE
- CVE-2021-0976
- Published
- Dec 15, 2021
- Updated
- Aug 3, 2024
- Vendor
- Google Cloud
- Product
- Android
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 15, 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?
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- Affected versionversion=Android-12
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
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Technologies
Your stack
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Your stack
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