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CVE-2020-7637

Good to know:

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Date: April 6, 2020

class-transformer before 0.3.1 allow attackers to perform Prototype Pollution. The classToPlainFromExist function could be tricked into adding or modifying properties of Object.prototype using a proto payload.

Language: TYPE_SCRIPT

Severity Score

Related Resources (5)

https://github.com/typestack/class-transformer/commit/8f04eb9db02de708f1a20f6f2d2bb309b2fed01e
https://github.com/typestack/class-transformer/blob/a650d9f490573443f62508bc063b857bcd5e2525/src/ClassTransformer.ts#L29-L31,
https://github.com/typestack/class-transformer
https://nvd.nist.gov/vuln/detail/CVE-2020-7637
https://www.mend.io/vulnerability-database/CVE-2020-7637

Severity Score

Weakness Type (CWE)

Improper Input Validation

CWE-20

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

CWE-1321

Improperly Controlled Modification of Dynamically-Determined Object Attributes

CWE-915

Top Fix

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Upgrade Version

Upgrade to version class-transformer - 0.3.1

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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