{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.27"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "f118e7e871d0a86528c051d08a91dcc9c07ca187"
            }
          ],
          "repo": "https://github.com/s3ql/s3ql",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "S3QL before 2.27 mishandles checksumming, and consequently allows replay attacks in which an attacker who controls the backend can present old versions of the filesystem metadata database as up-to-date, temporarily inject zero-valued bytes into files, or temporarily hide parts of files. This is related to the checksum_basic_mapping function.",
  "id": "CVE-2018-12088",
  "modified": "2026-03-13T21:57:50.350652081Z",
  "published": "2018-06-10T23:29:00.220Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://groups.google.com/forum/#%21topic/s3ql/4TzCVIMkA4o"
    },
    {
      "type": "FIX",
      "url": "https://bitbucket.org/nikratio/s3ql/commits/85aba5c2d5c81453a73a50ed638adaeef0521020"
    },
    {
      "type": "EVIDENCE",
      "url": "https://bitbucket.org/nikratio/s3ql/issues/272/t3_verifypy-test_retrieve-sometimes-fails"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}