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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-43843 Detail

Description

jsx-slack is a package for building JSON objects for Slack block kit surfaces from JSX. The maintainers found the patch for CVE-2021-43838 in jsx-slack v4.5.1 is insufficient tfor protection from a Regular Expression Denial of Service (ReDoS) attack. If an attacker can put a lot of JSX elements into `<blockquote>` tag _with including multibyte characters_, an internal regular expression for escaping characters may consume an excessive amount of computing resources. v4.5.1 passes the test against ASCII characters but misses the case of multibyte characters. jsx-slack v4.5.2 has updated regular expressions for escaping blockquote characters to prevent catastrophic backtracking. It is also including an updated test case to confirm rendering multiple tags in `<blockquote>` with multibyte characters.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 3.x Severity and Vector Strings:

NIST CVSS score
NIST: NVD
Base Score:  7.5 HIGH
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Nist CVSS score does not match with CNA score
CNA:  GitHub, Inc.
Base Score:  5.3 MEDIUM
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/yhatt/jsx-slack/commit/46bc88391d89d5fda4ce689e18ca080bcdd29ecc Patch  Third Party Advisory 
https://github.com/yhatt/jsx-slack/commit/46bc88391d89d5fda4ce689e18ca080bcdd29ecc Patch  Third Party Advisory 
https://github.com/yhatt/jsx-slack/releases/tag/v4.5.2 Release Notes  Third Party Advisory 
https://github.com/yhatt/jsx-slack/releases/tag/v4.5.2 Release Notes  Third Party Advisory 
https://github.com/yhatt/jsx-slack/security/advisories/GHSA-55xv-f85c-248q Exploit  Patch  Third Party Advisory 
https://github.com/yhatt/jsx-slack/security/advisories/GHSA-55xv-f85c-248q Exploit  Patch  Third Party Advisory 
https://github.com/yhatt/jsx-slack/security/advisories/GHSA-hp68-xhvj-x6j6 Exploit  Patch  Third Party Advisory 
https://github.com/yhatt/jsx-slack/security/advisories/GHSA-hp68-xhvj-x6j6 Exploit  Patch  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-Other Other cwe source acceptance level NIST  
CWE-400 Uncontrolled Resource Consumption GitHub, Inc.  
CWE-1333 Inefficient Regular Expression Complexity GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:jsx-slack_project:jsx-slack:*:*:*:*:*:node.js:*:*
   Show Matching CPE(s) 		Up to (excluding)
4.5.2

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-43843
NVD Published Date:
12/20/2021
NVD Last Modified:
11/21/2024
Source:
GitHub, Inc.