CVE-2021-21412 : Potential for arbitrary code execution in npm package @thi.ng/egf `#gpg`-tagged

Potential for arbitrary code execution in npm package @thi.ng/egf `#gpg`-tagged property values (only if `decrypt: true` option is enabled). PR with patch has been submitted and will has been released as of v0.4.0 By default the EGF parse functions do NOT attempt to decrypt values (since GPG only available in non-browser env). However, if GPG encrypted values are used/required: 1. Perform a regex search for `#gpg`-tagged values in the EGF source file/string and check for backtick (\`) chars in the encrypted value string 2. Replace/remove them or skip parsing if present.

Published 2021-03-30 18:15:16

Updated 2021-04-02 19:00:30

Source GitHub, Inc.

View at NVD, CVE.org

Products affected by CVE-2021-21412

@thi.ng/egf Project » @thi.ng/egf » For Node.js
Versions before (<) 0.4.0
cpe:2.3:a:\@thi.ng\/egf_project:\@thi.ng\/egf:*:*:*:*:*:node.js:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-21412

EPSS FAQ

0.16%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 52 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-21412

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.5	MEDIUM	AV:N/AC:L/Au:S/C:P/I:P/A:P	8.0	6.4	NIST
Access Vector: Network Access Complexity: Low Authentication: Single Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
8.8	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	2.8	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High
6.4	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N	3.1	2.7	GitHub, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Changed Confidentiality: Low Integrity: Low Availability: None

CWE ids for CVE-2021-21412

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Assigned by: security-advisories@github.com (Primary)

References for CVE-2021-21412

https://github.com/thi-ng/umbrella/security/advisories/GHSA-rj44-gpjc-29r7

[thi.ng/egf] Potential arbitrary code execution of `#gpg`-tagged property values · Advisory · thi-ng/umbrella · GitHub
Patch;Third Party Advisory
https://www.npmjs.com/package/@thi.ng/egf

@thi.ng/egf - npm
Product;Third Party Advisory
https://github.com/thi-ng/umbrella/blob/develop/packages/egf/CHANGELOG.md#040-2021-03-27

umbrella/CHANGELOG.md at develop · thi-ng/umbrella · GitHub
Release Notes;Third Party Advisory
https://github.com/thi-ng/umbrella/commit/88f61656e5f5cfba960013b8133186389efaf243

Merge pull request from GHSA-rj44-gpjc-29r7 · thi-ng/umbrella@88f6165 · GitHub
Patch;Third Party Advisory

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Vulnerability Details : CVE-2021-21412

Products affected by CVE-2021-21412

Exploit prediction scoring system (EPSS) score for CVE-2021-21412

CVSS scores for CVE-2021-21412

CWE ids for CVE-2021-21412

References for CVE-2021-21412