Prototype pollution via nested array path keys
Published Sep 21, 2021 · Updated Sep 16, 2024
Prototype pollution in client IO JointJS before 3.4.2 allows attackers to modify inherited properties via crafted path arrays. setByPath accepts nested array elements as keys without first coercing them to strings, so an array containing proto bypasses reserved-key checks. Exploitation requires an application to pass attacker-controlled path arrays to setByPath and can alter properties inherited by objects in that process.
Summary
What happened
Prototype pollution in client IO JointJS before 3.4.2 allows attackers to modify inherited properties via crafted path arrays. setByPath accepts nested array elements as keys without first coercing them to strings, so an array containing proto bypasses reserved-key checks. Exploitation requires an application to pass attacker-controlled path arrays to setByPath and can alter properties inherited by objects in that process.
The record
- CVE
- CVE-2021-23444
- Published
- Sep 21, 2021
- Updated
- Sep 16, 2024
- Vendor
- client IO
- Product
- JointJS
- Classifications
- CWE-843, CWE-1321
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 21, 2021CVE 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
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <3.4.2
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 setByPath nested-array proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo