Service exhaustion via money-type regex backtracking
Published Feb 11, 2021 · Updated Aug 3, 2024
ReDoS in Active Record's PostgreSQL money type before 5.2.4.5, 6.0.3.5, and 6.1.2.1 allows remote attackers to hang Rails workers. PostgreSQL::OID::Money#cast_value applies backtracking-prone money-format regular expressions to attacker-controlled strings, allowing long punctuation runs to consume excessive processing time. Exposure requires PostgreSQL, a money-type column, and application code that passes user input into that column; the bounded consequence is application service interruption.
Summary
What happened
ReDoS in Active Record's PostgreSQL money type before 5.2.4.5, 6.0.3.5, and 6.1.2.1 allows remote attackers to hang Rails workers. PostgreSQL::OID::Money#cast_value applies backtracking-prone money-format regular expressions to attacker-controlled strings, allowing long punctuation runs to consume excessive processing time. Exposure requires PostgreSQL, a money-type column, and application code that passes user input into that column; the bounded consequence is application service interruption.
The record
- CVE
- CVE-2021-22880
- Published
- Feb 11, 2021
- Updated
- Aug 3, 2024
- Vendor
- Ruby on Rails
- Product
- Active Record
- Classifications
- CWE-400, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 11, 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=Fixed in 6.1.2.1, 6.0.3.5, 5.2.4.5
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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