GHSA-HP68-XHVJ-X6J6

Vulnerability from github – Published: 2022-01-06 18:34 – Updated: 2022-08-11 18:43
VLAI
Summary
jsx-slack insufficient patch for CVE-2021-43838 ReDoS
Details

We found the patch for CVE-2021-43838 in jsx-slack v4.5.1 is insufficient to save from Regular Expression Denial of Service (ReDoS) attack.

This vulnerability affects to jsx-slack v4.5.1 and earlier versions.

Impact

If 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.

/** @jsxImportSource jsx-slack */
import { Section } from 'jsx-slack'

console.log(
  <Section>
    <blockquote>
      {[...Array(40)].map(() => (
        <p>亜</p>
      ))}
    </blockquote>
  </Section>
)

v4.5.1 has released by passing the test against ASCII characters but missed the case of multibyte characters. https://github.com/yhatt/jsx-slack/security/advisories/GHSA-55xv-f85c-248q

Patches

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.

References

  • https://github.com/yhatt/jsx-slack/commit/46bc88391d89d5fda4ce689e18ca080bcdd29ecc

Credits

Thanks to @hieki for finding out this vulnerability.

Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "jsx-slack"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.5.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-43843"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-01-04T20:19:23Z",
    "nvd_published_at": "2021-12-20T22:15:00Z",
    "severity": "MODERATE"
  },
  "details": "We found the patch for CVE-2021-43838 in jsx-slack v4.5.1 is insufficient to save from Regular Expression Denial of Service (ReDoS) attack.\n\nThis vulnerability affects to jsx-slack v4.5.1 and earlier versions.\n\n### Impact\n\nIf attacker can put a lot of JSX elements into `\u003cblockquote\u003e` tag _with including multibyte characters_, an internal regular expression for escaping characters may consume an excessive amount of computing resources.\n\n```javascript\n/** @jsxImportSource jsx-slack */\nimport { Section } from \u0027jsx-slack\u0027\n\nconsole.log(\n  \u003cSection\u003e\n    \u003cblockquote\u003e\n      {[...Array(40)].map(() =\u003e (\n        \u003cp\u003e\u4e9c\u003c/p\u003e\n      ))}\n    \u003c/blockquote\u003e\n  \u003c/Section\u003e\n)\n```\n\nv4.5.1 has released by passing the test against ASCII characters but missed the case of multibyte characters.\nhttps://github.com/yhatt/jsx-slack/security/advisories/GHSA-55xv-f85c-248q\n\n### Patches\n\njsx-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 `\u003cblockquote\u003e` with multibyte characters.\n\n### References\n\n- https://github.com/yhatt/jsx-slack/commit/46bc88391d89d5fda4ce689e18ca080bcdd29ecc\n\n### Credits\n\nThanks to @hieki for finding out this vulnerability.",
  "id": "GHSA-hp68-xhvj-x6j6",
  "modified": "2022-08-11T18:43:28Z",
  "published": "2022-01-06T18:34:18Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/yhatt/jsx-slack/security/advisories/GHSA-55xv-f85c-248q"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yhatt/jsx-slack/security/advisories/GHSA-hp68-xhvj-x6j6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-43843"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yhatt/jsx-slack/commit/46bc88391d89d5fda4ce689e18ca080bcdd29ecc"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yhatt/jsx-slack/releases/tag/v4.5.2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yhatt/jsx-slack/security"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "jsx-slack insufficient patch for CVE-2021-43838 ReDoS"
}



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