Service interruption via unsafe patch path traversal
Published Jan 19, 2021 · Updated Sep 17, 2024
Prototype pollution in Immer before 8.0.1 allows remote attackers to interrupt consuming applications via crafted patches. The applyPatches_ function follows attacker-controlled path segments such as proto or constructor into inherited objects and assigns supplied values without rejecting reserved attributes. Exploitation requires a consuming application to enable patches and pass attacker-controlled patch objects; the resulting effect depends on how polluted properties are used.
Summary
What happened
Prototype pollution in Immer before 8.0.1 allows remote attackers to interrupt consuming applications via crafted patches. The applyPatches_ function follows attacker-controlled path segments such as proto or constructor into inherited objects and assigns supplied values without rejecting reserved attributes. Exploitation requires a consuming application to enable patches and pass attacker-controlled patch objects; the resulting effect depends on how polluted properties are used.
The record
- CVE
- CVE-2020-28477
- Published
- Jan 19, 2021
- Updated
- Sep 17, 2024
- Vendor
- Michel Weststrate
- Product
- Immer
- Classifications
- CWE-1321, CWE-471
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 19, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <unspecified
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
- GitHub Advisory applyPatches proof of exploitproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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