7.5 High
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
9.8 High
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
9.6 High
AI Score
Confidence
High
0.007 Low
EPSS
Percentile
81.0%
Prototype pollution vulnerability in ‘deep-defaults’ versions 1.0.0 through 1.0.5 allows attacker to cause a denial of service and may lead to remote code execution.
The NPM module deep-defaults
can be abused by Prototype Pollution vulnerability since the function _deepDefaults()
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 _deepDefaults ()
function accepts dest
, src
as arguments. Due to the absence of validation on the values passed into the src
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. Later in the code, if there is a check to validate polluted
the valued would be substituted as “Yes! Its Polluted” as it had been polluted.
var deepDefaults = require("deep-defaults")
var malicious_payload = '{"__proto__":{"polluted":"Yes! Its Polluted"}}';
var obj ={};
console.log("Before : " + {}.polluted);
deepDefaults(obj, JSON.parse(malicious_payload));
console.log("After : " + {}.polluted);
CPE | Name | Operator | Version |
---|---|---|---|
deep-defaults | le | 1.0.5 |
7.5 High
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
9.8 High
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
9.6 High
AI Score
Confidence
High
0.007 Low
EPSS
Percentile
81.0%