GHSA-3CJH-P6PW-JHV9

Vulnerability from github – Published: 2023-09-19 17:00 – Updated: 2023-09-19 17:00
VLAI
Summary
Pow Mnesia cache doesn't invalidate all expired keys on startup
Details

Use of Pow.Store.Backend.MnesiaCache is susceptible to session hijacking as expired keys are not being invalidated correctly on startup. A cache key may become expired when all Pow.Store.Backend.MnesiaCache instances have been shut down for a period that is longer than the keys' remaining TTL and the expired key won't be invalidated on startups.

Workarounds

The expired keys, including all expired sessions, can be manually invalidated by running:

:mnesia.sync_transaction(fn ->
  Enum.each(:mnesia.dirty_select(Pow.Store.Backend.MnesiaCache, [{{Pow.Store.Backend.MnesiaCache, :_, :_}, [], [:"$_"]}]), fn {_, key,  {_value, expire}} ->
    ttl = expire - :os.system_time(:millisecond)
    if ttl < 0, do: :mnesia.delete({Pow.Store.Backend.MnesiaCache, key})
  end)
end)

References

https://github.com/pow-auth/pow/commit/15dc525be03c466daa5d2119ca7acdec7b24ed17 https://github.com/pow-auth/pow/issues/713 https://github.com/pow-auth/pow/pull/714

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Hex",
        "name": "pow"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.0.14"
            },
            {
              "fixed": "1.0.34"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-42446"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-298",
      "CWE-672"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-09-19T17:00:08Z",
    "nvd_published_at": "2023-09-18T22:15:47Z",
    "severity": "MODERATE"
  },
  "details": "Use of `Pow.Store.Backend.MnesiaCache` is susceptible to session hijacking as expired keys are not being invalidated correctly on startup. A cache key may become expired when all `Pow.Store.Backend.MnesiaCache` instances have been shut down for a period that is longer than the keys\u0027 remaining TTL and the expired key won\u0027t be invalidated on startups.\n\n### Workarounds\n\nThe expired keys, including all expired sessions, can be manually invalidated by running:\n\n```elixir\n:mnesia.sync_transaction(fn -\u003e\n  Enum.each(:mnesia.dirty_select(Pow.Store.Backend.MnesiaCache, [{{Pow.Store.Backend.MnesiaCache, :_, :_}, [], [:\"$_\"]}]), fn {_, key,  {_value, expire}} -\u003e\n    ttl = expire - :os.system_time(:millisecond)\n    if ttl \u003c 0, do: :mnesia.delete({Pow.Store.Backend.MnesiaCache, key})\n  end)\nend)\n```\n\n### References\nhttps://github.com/pow-auth/pow/commit/15dc525be03c466daa5d2119ca7acdec7b24ed17\nhttps://github.com/pow-auth/pow/issues/713\nhttps://github.com/pow-auth/pow/pull/714\n",
  "id": "GHSA-3cjh-p6pw-jhv9",
  "modified": "2023-09-19T17:00:08Z",
  "published": "2023-09-19T17:00:08Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pow-auth/pow/security/advisories/GHSA-3cjh-p6pw-jhv9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-42446"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pow-auth/pow/issues/713"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pow-auth/pow/pull/714"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pow-auth/pow/commit/15dc525be03c466daa5d2119ca7acdec7b24ed17"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pow-auth/pow"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Pow Mnesia cache doesn\u0027t invalidate all expired keys on startup"
}



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