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
7.8 High
AI Score
Confidence
High
0.012 Low
EPSS
Percentile
85.5%
Prototype pollution vulnerability in ‘flattenizer’ versions 0.0.5 through 1.0.5 allows an attacker to cause a denial of service and may lead to remote code execution.
The NPM module ‘flattenizer’ can be abused by Prototype Pollution vulnerability since the function ‘unflatten()’ did 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.
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 thereby polluting the Object prototype. Later in the code, if there is a check to validate polluted
the valued would be substituted as “true” as it had been polluted.
var flattenizer = require("flattenizer")
flattenizer.unflatten({'__proto__.polluted': true});
console.log(polluted);
CPE | Name | Operator | Version |
---|---|---|---|
flattenizer | ge | 0.0.5 | |
flattenizer | le | 1.0.5 |
github.com/advisories/GHSA-vq33-26pr-r4h6
github.com/sahellebusch/flattenizer/commit/3c6a6353df7c8879e931973b81a49a47f6c2b399
github.com/sahellebusch/flattenizer/pull/13
nvd.nist.gov/vuln/detail/CVE-2020-28279
web.archive.org/web/20210104205035/https://www.whitesourcesoftware.com/vulnerability-database/CVE-2020-28279
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
7.8 High
AI Score
Confidence
High
0.012 Low
EPSS
Percentile
85.5%