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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWpxZmgtOGh3NS1mcWpy
Improper Handling of Exceptional Conditions in detect-character-encoding
Impact
In detect-character-encoding v0.6.0 and earlier, data matching no charset causes the Node.js process to crash.
Patches
The problem has been patched in detect-character-encoding v0.7.0.
CVSS score
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/RL:O/RC:C
Base Score: 7.5 (High)
Temporal Score: 7.2 (High)
Since detect-character-encoding is a library, the scoring is based on the “reasonable worst-case implementation scenario”, namely, accepting data from untrusted sources over a network and passing it directly to detect-character-encoding. Depending on your specific implementation, the vulnerability’s severity in your program may be different.
Proof of concept
const express = require("express");
const bodyParser = require("body-parser");
const detectCharacterEncoding = require("detect-character-encoding");
const app = express();
app.use(bodyParser.raw());
app.post("/", (req, res) => {
const charsetMatch = detectCharacterEncoding(req.body);
res.end(charsetMatch.encoding);
});
app.listen(3000);
printf "\xAA" | curl --request POST --header "Content-Type: application/octet-stream" --data-binary @- http://localhost:3000
crashes the server.
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWpxZmgtOGh3NS1mcWpy
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 2 years ago
Updated: over 1 year ago
CVSS Score: 7.5
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Identifiers: GHSA-jqfh-8hw5-fqjr, CVE-2021-39157
References:
- https://github.com/sonicdoe/detect-character-encoding/security/advisories/GHSA-jqfh-8hw5-fqjr
- https://github.com/sonicdoe/detect-character-encoding/issues/15
- https://github.com/sonicdoe/detect-character-encoding/commit/992a11007fff6cfd40b952150ab8d30410c4a20a
- https://github.com/sonicdoe/detect-character-encoding/releases/tag/v0.7.0
- https://nvd.nist.gov/vuln/detail/CVE-2021-39157
- https://github.com/advisories/GHSA-jqfh-8hw5-fqjr
Blast Radius: 14.0
Affected Packages
npm:detect-character-encoding
Dependent packages: 35Dependent repositories: 73
Downloads: 14,125 last month
Affected Version Ranges: < 0.7.0
Fixed in: 0.7.0
All affected versions: 0.1.0, 0.2.0, 0.2.1, 0.3.0, 0.3.1, 0.4.0, 0.5.0, 0.5.1, 0.6.0
All unaffected versions: 0.7.0, 0.8.0, 0.9.0