A Denial of Service vulnerability exists in qs up to 6.8.0 due to insufficient sanitization of property in the gs.parse function. The merge() function allows the assignment of properties on an array in the query. For any property being assigned, a value in the array is converted to an object containing these properties. Essentially, this means that the property whose expected type is Array always has to be checked with Array.isArray() by the user. This may not be obvious to the user and can cause unexpected behavior.
:heavy_check_mark: This issue was automatically closed by Mend because the vulnerable library in the specific branch(es) was either marked as ignored or it is no longer part of the Mend inventory.
CVE-2021-44907 - High Severity Vulnerability
Vulnerable Libraries - qs-6.7.0.tgz, qs-6.4.0.tgz
qs-6.7.0.tgz
A querystring parser that supports nesting and arrays, with a depth limit
Library home page: https://registry.npmjs.org/qs/-/qs-6.7.0.tgz
Dependency Hierarchy: - karma-4.1.0.tgz (Root Library) - body-parser-1.19.0.tgz - :x: **qs-6.7.0.tgz** (Vulnerable Library)
qs-6.4.0.tgz
A querystring parser that supports nesting and arrays, with a depth limit
Library home page: https://registry.npmjs.org/qs/-/qs-6.4.0.tgz
Dependency Hierarchy: - firebase-tools-7.1.0.tgz (Root Library) - superstatic-6.0.4.tgz - connect-query-1.0.0.tgz - :x: **qs-6.4.0.tgz** (Vulnerable Library)
Found in HEAD commit: 455eb99f675e69905ab38940909c066a5afa5880
Vulnerability Details
A Denial of Service vulnerability exists in qs up to 6.8.0 due to insufficient sanitization of property in the gs.parse function. The merge() function allows the assignment of properties on an array in the query. For any property being assigned, a value in the array is converted to an object containing these properties. Essentially, this means that the property whose expected type is Array always has to be checked with Array.isArray() by the user. This may not be obvious to the user and can cause unexpected behavior.
Publish Date: 2022-03-17
URL: CVE-2021-44907
CVSS 3 Score Details (7.5)
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: None - Integrity Impact: None - Availability Impact: High
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Origin: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44907
Release Date: 2022-03-17
Fix Resolution (qs): 6.8.1
Direct dependency fix Resolution (karma): 4.4.1