ghsa-hxcc-f52p-wc94
Vulnerability from github
Published
2020-08-11 17:21
Modified
2021-09-23 18:50
Severity ?
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
Insecure serialization leading to RCE in serialize-javascript
Details

serialize-javascript prior to 3.1.0 allows remote attackers to inject arbitrary code via the function "deleteFunctions" within "index.js".

An object such as {"foo": /1"/, "bar": "a\"@__R-<UID>-0__@"} was serialized as {"foo": /1"/, "bar": "a\/1"/}, which allows an attacker to escape the bar key. This requires the attacker to control the values of both foo and bar and guess the value of <UID>. The UID has a keyspace of approximately 4 billion making it a realistic network attack.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "serialize-javascript"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-7660"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-08-11T14:14:51Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "serialize-javascript prior to 3.1.0 allows remote attackers to inject arbitrary code via the function \"deleteFunctions\" within \"index.js\". \n\nAn object such as `{\"foo\": /1\"/, \"bar\": \"a\\\"@__R-\u003cUID\u003e-0__@\"}` was serialized as `{\"foo\": /1\"/, \"bar\": \"a\\/1\"/}`, which allows an attacker to escape the `bar` key. This requires the attacker to control the values of both `foo` and `bar` and guess the value of `\u003cUID\u003e`. The UID has a keyspace of approximately 4 billion making it a realistic network attack.",
  "id": "GHSA-hxcc-f52p-wc94",
  "modified": "2021-09-23T18:50:59Z",
  "published": "2020-08-11T17:21:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-7660"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yahoo/serialize-javascript/commit/f21a6fb3ace2353413761e79717b2d210ba6ccbd"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/yahoo/serialize-javascript"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Insecure serialization leading to RCE in serialize-javascript"
}


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