Vulnerabilities > CVE-2021-43843 - Unspecified vulnerability in Jsx-Slack Project Jsx-Slack

CVSS 7.5 - HIGH

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

NONE

Integrity impact

NONE

Availability impact

HIGH

network

low complexity

jsx-slack-project

NVD

Published: 2021-12-20

Updated: 2024-11-21

Summary

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.

Vulnerable Configurations

Part	Description	Count
Application	Jsx-Slack_Project JSX Slack Project JSX Slack 0.1.0 JSX Slack Project JSX Slack 0.2.0 JSX Slack Project JSX Slack 0.3.0 JSX Slack Project JSX Slack 0.4.0 JSX Slack Project JSX Slack 0.4.1 JSX Slack Project JSX Slack 0.4.2 JSX Slack Project JSX Slack 0.4.3 JSX Slack Project JSX Slack 0.5.0 JSX Slack Project JSX Slack 0.5.1 JSX Slack Project JSX Slack 0.6.0 JSX Slack Project JSX Slack 0.7.0 JSX Slack Project JSX Slack 0.8.0 JSX Slack Project JSX Slack 0.8.1 JSX Slack Project JSX Slack 0.9.0 JSX Slack Project JSX Slack 0.9.1 JSX Slack Project JSX Slack 0.9.2 JSX Slack Project JSX Slack 0.10.0 JSX Slack Project JSX Slack 0.10.1 JSX Slack Project JSX Slack 0.10.2 JSX Slack Project JSX Slack 0.11.0 JSX Slack Project JSX Slack 0.11.1 JSX Slack Project JSX Slack 0.12.0 JSX Slack Project JSX Slack 1.0.0 JSX Slack Project JSX Slack 1.1.0 JSX Slack Project JSX Slack 1.2.0 JSX Slack Project JSX Slack 1.3.0 JSX Slack Project JSX Slack 1.3.1 JSX Slack Project JSX Slack 1.4.0 JSX Slack Project JSX Slack 1.5.0 JSX Slack Project JSX Slack 1.5.1 JSX Slack Project JSX Slack 1.6.0 JSX Slack Project JSX Slack 1.7.0 JSX Slack Project JSX Slack 2.0.0 JSX Slack Project JSX Slack 2.1.0 JSX Slack Project JSX Slack 2.2.0 JSX Slack Project JSX Slack 2.2.1 JSX Slack Project JSX Slack 2.3.0 JSX Slack Project JSX Slack 2.4.0 JSX Slack Project JSX Slack 2.5.0 JSX Slack Project JSX Slack 2.5.1 JSX Slack Project JSX Slack 2.6.0 JSX Slack Project JSX Slack 3.0.0 JSX Slack Project JSX Slack 4.0.0 JSX Slack Project JSX Slack 4.1.0 JSX Slack Project JSX Slack 4.2.0 JSX Slack Project JSX Slack 4.2.1 JSX Slack Project JSX Slack 4.3.0 JSX Slack Project JSX Slack 4.4.0 JSX Slack Project JSX Slack 4.4.1 JSX Slack Project JSX Slack 4.4.2 JSX Slack Project JSX Slack 4.4.3 JSX Slack Project JSX Slack 4.5.0 JSX Slack Project JSX Slack 4.5.1	59

Summary

Vulnerable Configurations

References