Protected-data disclosure via hard-coded AES key
Published Apr 17, 2020 · Updated Aug 4, 2024
Hard-coded cryptographic key use in airhost.exe in Zoom Client for Meetings 4.6.11 allows remote attackers to read protected data. airhost.exe hashes the fixed string 0123425234234fsdfsdr3242 and supplies the digest when initializing an OpenSSL EVP AES-256 CBC context, making the key predictable if that path executes. Zoom states that this initialization exists only in unreachable code, so released clients expose no trigger and the reported confidentiality impact remains disputed.
Summary
What happened
Hard-coded cryptographic key use in airhost.exe in Zoom Client for Meetings 4.6.11 allows remote attackers to read protected data. airhost.exe hashes the fixed string 0123425234234fsdfsdr3242 and supplies the digest when initializing an OpenSSL EVP AES-256 CBC context, making the key predictable if that path executes. Zoom states that this initialization exists only in unreachable code, so released clients expose no trigger and the reported confidentiality impact remains disputed.
The record
- CVE
- CVE-2020-11876
- Published
- Apr 17, 2020
- Updated
- Aug 4, 2024
- Vendor
- Zoom Video Communications, Inc.
- Product
- Zoom Client for Meetings
- Classifications
- CWE-327
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 17, 2020CVE 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?
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- Affected versionversion=4.6.11
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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