CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
85.0%
Prototype pollution vulnerability in ‘changeset’ versions 0.0.1 through 0.2.5 allows attackers to cause a denial of service and may lead to remote code execution.
The npm module ‘changeset’ can be abused by Prototype Pollution vulnerability since the function ‘apply()’ does not check for the type of object before assigning value to the property. Due to this flaw an attacker could create a non-existent property or able to manipulate the property which leads to Denial of Service or potentially Remote code execution.
The ‘apply()’ function accepts ‘changes, target, modify’ as argument. Due to the absence of validation on the values passed into the ‘changes’ argument, an attacker can supply a malicious value by adjusting the value to include the ‘proto’ property. Since there is no validation before assigning the property to check whether the assigned argument is the Object’s own property or not, the property ‘polluted’ will be directly be assigned to the new object thereby polluting the Object prototype. Using the example below, if there is a check to validate ‘polluted’ the valued later in the code, it would be substituted as “Yes! Its Polluted” as it had been polluted.
var changeset = require("changeset") const patch = [{
type: 'put',
key: ["__proto__", "polluted"],
value: "Yes! Its Polluted"
}];
console.log("Before : " + {}.polluted);
changeset.apply(patch, {}, true);
console.log("After : " + {}.polluted);
Vendor | Product | Version | CPE |
---|---|---|---|
changeset_project | changeset | * | cpe:2.3:a:changeset_project:changeset:*:*:*:*:*:node.js:*:* |
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
85.0%