Memory disclosure via unchecked debugger bulk length
Published Oct 4, 2021 · Updated Aug 3, 2024
Out-of-bounds read in the Redis Lua Debugger allows remote authenticated users to disclose process memory via malformed requests. The ldbReplParseCommand function trusts a declared bulk-string length and copies that many bytes without verifying that the client buffer contains them. Exploitation requires access to Lua debugging; the exposed bytes affect confidentiality without reported data modification or service interruption.
Summary
What happened
Out-of-bounds read in the Redis Lua Debugger allows remote authenticated users to disclose process memory via malformed requests. The ldbReplParseCommand function trusts a declared bulk-string length and copies that many bytes without verifying that the client buffer contains them. Exploitation requires access to Lua debugging; the exposed bytes affect confidentiality without reported data modification or service interruption.
The record
- CVE
- CVE-2021-32672
- Published
- Oct 4, 2021
- Updated
- Aug 3, 2024
- Vendor
- Redis
- Product
- Redis
- Classifications
- CWE-126, CWE-125
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 4, 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=>= 3.2.0, < 5.0.14
- Affected versionversion=>= 6.0.0, < 6.0.16
- Affected versionversion=>= 6.0.0, < 6.2.6
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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