Prototype pollution via unchecked parentKey traversal
Published May 1, 2022 · Updated Sep 17, 2024
Prototype pollution in Mozilla Convict before 6.2.2 allows attackers to alter object prototypes through crafted configuration keys. The set method splits a dotted key, resolves parentKey with walk(), and writes childKey without rejecting proto or constructor.prototype paths. Exploitation requires an application or administrator to supply an attacker-influenced key, after which inherited properties can be injected or overwritten and the process can crash.
Summary
What happened
Prototype pollution in Mozilla Convict before 6.2.2 allows attackers to alter object prototypes through crafted configuration keys. The set method splits a dotted key, resolves parentKey with walk(), and writes childKey without rejecting proto or constructor.prototype paths. Exploitation requires an application or administrator to supply an attacker-influenced key, after which inherited properties can be injected or overwritten and the process can crash.
The record
- CVE
- CVE-2022-22143
- Published
- May 1, 2022
- Updated
- Sep 17, 2024
- Vendor
- Mozilla
- Product
- Convict
- Classifications
- CWE-1321
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 1, 2022CVE 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <6.2.2
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
- Snyk Convict prototype pollution PoCproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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