Authenticated code execution via undersized LCS allocation
Published May 4, 2021 · Updated Aug 3, 2024
Integer overflow in Redis 6.0.0 through 6.0.12 and 6.2.0 through 6.2.2 allows remote authenticated users to execute code. The stralgoLCS function calculates its LCS table allocation with 32-bit operands, so attacker-controlled string lengths wrap the allocation size and subsequent table accesses read and write beyond the heap buffer. Access requires a network client authorized to run STRALGO LCS; successful exploitation can crash the server or execute code in its process.
Summary
What happened
Integer overflow in Redis 6.0.0 through 6.0.12 and 6.2.0 through 6.2.2 allows remote authenticated users to execute code. The stralgoLCS function calculates its LCS table allocation with 32-bit operands, so attacker-controlled string lengths wrap the allocation size and subsequent table accesses read and write beyond the heap buffer. Access requires a network client authorized to run STRALGO LCS; successful exploitation can crash the server or execute code in its process.
The record
- CVE
- CVE-2021-29477
- Published
- May 4, 2021
- Updated
- Aug 3, 2024
- Vendor
- Redis
- Product
- Redis
- Classifications
- CWE-680, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 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=>= 6.0.0, < 6.0.13
- Affected versionversion=>= 6.2.0, < 6.2.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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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