github - ghsa-vgrx-w6rg-8fqf

GHSA-VGRX-W6RG-8FQF

Vulnerability from github – Published: 2018-11-06 23:12 – Updated: 2020-08-31 18:10

Summary

Forgeable Public/Private Tokens in jwt-simple

Details

Affected versions of the jwt-simple package allow users to select what algorithm the server will use to verify a provided JWT. A malicious actor can use this behaviour to arbitrarily modify the contents of a JWT while still passing verification. For the common use case of the JWT, the end result is a complete authentication bypass with minimal effort.

Recommendation

Update to version 0.3.1 or later.

Additionally, be sure to always specify an algorithm in calls to .decode().

Show details on source website

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "jwt-simple"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2016-10555"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-06-16T21:57:45Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "details": "Affected versions of the `jwt-simple` package allow users to select what algorithm the server will use to verify a provided JWT. A malicious actor can use this behaviour to arbitrarily modify the contents of a JWT while still passing verification. For the common use case of the JWT, the end result is a complete authentication bypass with minimal effort.\n\n\n\n## Recommendation\n\nUpdate to version 0.3.1 or later.\n\nAdditionally, be sure to always specify an algorithm in calls to `.decode()`.",
  "id": "GHSA-vgrx-w6rg-8fqf",
  "modified": "2020-08-31T18:10:20Z",
  "published": "2018-11-06T23:12:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-10555"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hokaccha/node-jwt-simple/pull/14"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hokaccha/node-jwt-simple/pull/16"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hokaccha/node-jwt-simple/commit/957957cfa44474049b4603b293569588ee9ffd97"
    },
    {
      "type": "WEB",
      "url": "https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/advisories/87"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Forgeable Public/Private Tokens in jwt-simple"
}

CVE-2016-10555 (GCVE-0-2016-10555)

Vulnerability from cvelistv5 – Published: 2018-05-31 20:00 – Updated: 2024-09-16 16:38

Summary

Since "algorithm" isn't enforced in jwt.decode()in jwt-simple 0.3.0 and earlier, a malicious user could choose what algorithm is sent sent to the server. If the server is expecting RSA but is sent HMAC-SHA with RSA's public key, the server will think the public key is actually an HMAC private key. This could be used to forge any data an attacker wants.

Severity ?

No CVSS data available.

CWE

CWE-20 - Improper Input Validation (CWE-20)

Assigner

hackerone

References

URL

Tags

	https://nodesecurity.io/advisories/87	x_refsource_MISC
	https://github.com/hokaccha/node-jwt-simple/pull/14	x_refsource_MISC
	https://auth0.com/blog/2015/03/31/critical-vulner…	x_refsource_MISC
	https://github.com/hokaccha/node-jwt-simple/pull/16	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	HackerOne	jwt-simple node module	Affected: <=0.3.0

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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