Object prototype modification via inherited set path
Published Apr 12, 2022 · Updated Sep 16, 2024
Prototype pollution in IndexZero nconf before 0.11.4 allows remote attackers to modify Object.prototype through crafted set keys. Memory.prototype.set in lib/nconf/stores/memory.js follows inherited object-valued path segments and writes the final key without first requiring each segment to be an own property. The memory engine and an application path that passes attacker-controlled configuration keys are required; successful exploitation injects inherited properties into objects in the Node.js process.
Summary
What happened
Prototype pollution in IndexZero nconf before 0.11.4 allows remote attackers to modify Object.prototype through crafted set keys. Memory.prototype.set in lib/nconf/stores/memory.js follows inherited object-valued path segments and writes the final key without first requiring each segment to be an own property. The memory engine and an application path that passes attacker-controlled configuration keys are required; successful exploitation injects inherited properties into objects in the Node.js process.
The record
- CVE
- CVE-2022-21803
- Published
- Apr 12, 2022
- Updated
- Sep 16, 2024
- Vendor
- IndexZero
- Product
- nconf
- Classifications
- CWE-1321
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 12, 2022CVE publishedPublication date reported by the CVE source.
- Sep 16, 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 <0.11.4
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 nconf prototype-pollution proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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