Unauthenticated prototype pollution via unsafe Merge
Published Jul 2, 2021 · Updated Sep 17, 2024
Prototype Pollution in TS-NoDash (ts-nodash) all versions allows remote attackers to modify object prototypes via crafted Merge input. The Merge() function recursively copies attacker-controlled properties without filtering dangerous keys such as proto, allowing writes to Object.prototype. Exploitation requires an application to pass attacker-controlled objects to Merge(); resulting pollution can alter inherited properties, cause denial of service, or influence application behavior.
Summary
What happened
Prototype Pollution in TS-NoDash (ts-nodash) all versions allows remote attackers to modify object prototypes via crafted Merge input. The Merge() function recursively copies attacker-controlled properties without filtering dangerous keys such as proto, allowing writes to Object.prototype. Exploitation requires an application to pass attacker-controlled objects to Merge(); resulting pollution can alter inherited properties, cause denial of service, or influence application behavior.
The record
- CVE
- CVE-2021-23403
- Published
- Jul 2, 2021
- Updated
- Sep 17, 2024
- Vendor
- Shawn Rapp
- Product
- TS-NoDash
- Classifications
- CWE-1321
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 2, 2021CVE publishedPublication date reported by the CVE source.
- Sep 17, 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?
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- Affected versionversion=0 <unspecified
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
- ts-nodash Merge __proto__ proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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