Arbitrary code execution via AudioCodecs signed-to-unsigned conversion
Published Apr 2, 2021 · Updated Aug 4, 2024
An out-of-bounds read in CoreAudio across Apple macOS, iOS, iPadOS, watchOS, and tvOS allows attackers to execute code via a crafted audio file. ZDI identifies a signed-to-unsigned conversion in the AudioCodecs MP4 parser that writes crafted data beyond an allocated structure; Apple describes the flaw as an out-of-bounds read. Exploitation requires the target to visit a malicious page or open the file, and successful exploitation runs code in the context of the processing application.
Summary
What happened
An out-of-bounds read in CoreAudio across Apple macOS, iOS, iPadOS, watchOS, and tvOS allows attackers to execute code via a crafted audio file. ZDI identifies a signed-to-unsigned conversion in the AudioCodecs MP4 parser that writes crafted data beyond an allocated structure; Apple describes the flaw as an out-of-bounds read. Exploitation requires the target to visit a malicious page or open the file, and successful exploitation runs code in the context of the processing application.
The record
- CVE
- CVE-2020-27908
- Published
- Apr 2, 2021
- Updated
- Aug 4, 2024
- Vendor
- Apple
- Product
- iOS and iPadOS
- Classifications
- CWE-125, T1204.002, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 2, 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 <14.2
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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