GHSA-jjf5-wx3j-3fv7 — critical GitHub Advisory (CVE-2022-21190) in npm/convict

Description

This affects the package convict before 6.2.3. This is a bypass of CVE-2022-22143. The fix introduced, relies on the startsWith method and does not prevent the vulnerability: before splitting the path, it checks if it starts with proto or this.constructor.prototype. To bypass this check it's possible to prepend the dangerous paths with any string value followed by a dot, like for example foo.proto or foo.this.constructor.prototype.

Basic information

Type: reviewed
Severity: critical
Advisory on GitHub: Open advisory ↗
Repository advisory: —
Source code: Browse source ↗
Published (advisory): 2022-05-14 00:01:09 UTC
Updated: 2023-02-02 05:02:18 UTC
GitHub reviewed: 2022-05-25 22:54:49 UTC
NVD published: 2022-05-13

Score	Percentile
0.67%	70.52%

CVSS Scores

Base score	Version	Severity	Vector
9.8	3.1	—	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.

Identifiers

Type	Value
GHSA	GHSA-jjf5-wx3j-3fv7 ↗
CVE	CVE-2022-21190 ↗

CWEs

CWE id	Name
CWE-1321	Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem	Package	Vulnerable range	First patched	Vulnerable functions
npm	convict	< 6.2.3	6.2.3	—

Prototype Pollution in convict