CVE-2021-43838

CVSS V2 Medium 5 CVSS V3 High 7.5
Description
jsx-slack is a library for building JSON objects for Slack Block Kit surfaces from JSX. In versions prior to 4.5.1 users are vulnerable to a regular expression denial-of-service (ReDoS) attack. If attacker can put a lot of JSX elements into `<blockquote>` tag, an internal regular expression for escaping characters may consume an excessive amount of computing resources. jsx-slack v4.5.1 has patched to a regex for escaping blockquote characters. Users are advised to upgrade as soon as possible.
Overview
  • CVE ID
  • CVE-2021-43838
  • Assigner
  • security-advisories@github.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-12-17T19:15:07
  • Last Modified Date
  • 2022-01-03T13:24:34
Weakness Enumerations
CWE URL
NVD-CWE-Other http://cwe.mitre.org/data/definitions/NVD-Other.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:jsx-slack_project:jsx-slack:*:*:*:*:*:node.js:*:* 1 OR 4.5.2
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 5
  • Severity
  • MEDIUM
  • Exploitability Score
  • 10
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 7.5
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://github.com/yhatt/jsx-slack/commit/36e4a10405e4c7745333e245fcc5029c02c7065d Patch Third Party Advisory
https://github.com/yhatt/jsx-slack/security/advisories/GHSA-55xv-f85c-248q Exploit Patch Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-43838
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43838
History
Created Old Value New Value Data Type Notes
2022-05-10 06:39:21 Added to TrackCVE
2022-12-06 04:19:25 2021-12-17T19:15Z 2021-12-17T19:15:07 CVE Published Date updated
2022-12-06 04:19:25 2022-01-03T13:24:34 CVE Modified Date updated
2022-12-06 04:19:25 Analyzed Vulnerability Status updated