GHSA-92VM-WFM5-MXVV

Vulnerability from github – Published: 2020-01-06 18:44 – Updated: 2022-08-03 21:36
VLAI
Summary
cookie-signature Timing Attack
Details

Affected versions of cookie-signature are vulnerable to timing attacks as a result of using a fail-early comparison instead of a constant-time comparison.

Timing attacks remove the exponential increase in entropy gained from increased secret length, by providing per-character feedback on the correctness of a guess via miniscule timing differences.

Under favorable network conditions, an attacker can exploit this to guess the secret in no more than charset*length guesses, instead of charset^length guesses required were the timing attack not present.

Recommendation

Update to 1.0.4 or later.

Severity
4.4 (Medium)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "cookie-signature"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2016-1000236"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2019-12-27T22:19:47Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "Affected versions of `cookie-signature` are vulnerable to timing attacks as a result of using a fail-early comparison instead of a constant-time comparison. \n\nTiming attacks remove the exponential increase in entropy gained from increased secret length, by providing per-character feedback on the correctness of a guess via miniscule timing differences.\n\nUnder favorable network conditions, an attacker can exploit this to guess the secret in no more than `charset*length` guesses, instead of `charset^length` guesses required were the timing attack not present. \n\n\n\n## Recommendation\n\nUpdate to 1.0.4 or later.",
  "id": "GHSA-92vm-wfm5-mxvv",
  "modified": "2022-08-03T21:36:59Z",
  "published": "2020-01-06T18:44:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-1000236"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tj/node-cookie-signature/commit/2c4df6b6cee540f30876198cd0b5bebf28528c07"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tj/node-cookie-signature/commit/39791081692e9e14aa62855369e1c7f80fbfd50e"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tj/node-cookie-signature/commit/4cc5e21e7f59a4ea0b51cd5e9634772d48fab590"
    },
    {
      "type": "WEB",
      "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=838618"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1371409"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-1000236"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/tj/node-cookie-signature"
    },
    {
      "type": "WEB",
      "url": "https://security-tracker.debian.org/tracker/CVE-2016-1000236"
    },
    {
      "type": "WEB",
      "url": "https://travis-ci.com/nodejs/security-wg/builds/76423102"
    },
    {
      "type": "WEB",
      "url": "https://www.mail-archive.com/secure-testing-team@lists.alioth.debian.org/msg06583.html"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/advisories/134"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "cookie-signature Timing Attack"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

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  • 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.
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  • 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.



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