Object prototype modification via __proto__ sections
Published Apr 2, 2020 · Updated Aug 4, 2024
Prototype pollution in rawiroaisen ini-parser 0.0.2 and earlier allows local users to modify inherited object properties via crafted INI input. The parse function treats a proto section name as an ordinary object key, resolves it to Object.prototype, and writes parsed properties into that prototype. A caller must pass attacker-controlled INI text to parse; polluted properties then affect other objects in the same Node.js process, with downstream consequences determined by consuming code.
Summary
What happened
Prototype pollution in rawiroaisen ini-parser 0.0.2 and earlier allows local users to modify inherited object properties via crafted INI input. The parse function treats a proto section name as an ordinary object key, resolves it to Object.prototype, and writes parsed properties into that prototype. A caller must pass attacker-controlled INI text to parse; polluted properties then affect other objects in the same Node.js process, with downstream consequences determined by consuming code.
The record
- CVE
- CVE-2020-7617
- Published
- Apr 2, 2020
- Updated
- Aug 4, 2024
- Vendor
- rawiroaisen
- Product
- ini-parser
- Classifications
- CWE-915, CWE-1321, CAPEC-1, CAPEC-77, CAPEC-180
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 2, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <=0.0.2
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
- Snyk __proto__ INI proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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