rustsec-2025-0132
Vulnerability from osv_rustsec
Published
2025-11-28 12:00
Modified
2025-12-02 06:03
Summary
`Reader::open_mmap` unsoundly marks unsafe memmap operation as safe
Details

maxminddb prior to version 0.27 declared Reader::open_mmap as safe despite wrapping an inherently unsafe memmap2 operation with no extra step done to guarantee safety. This could have led to undefined behaviour if the file were to be modified on disk while the memory map was still active.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "memory-corruption"
        ],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [
            "maxminddb::Reader::open",
            "maxminddb::Reader::open_mmap"
          ],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "maxminddb",
        "purl": "pkg:cargo/maxminddb"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.11.0"
            },
            {
              "fixed": "0.27.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "GHSA-mj73-j457-8x9q"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "maxminddb prior to version 0.27 declared `Reader::open_mmap` as safe \ndespite wrapping an inherently unsafe memmap2 operation with no\nextra step done to guarantee safety. This could have led to undefined\nbehaviour if the file were to be modified on disk while the memory map\nwas still active.",
  "id": "RUSTSEC-2025-0132",
  "modified": "2025-12-02T06:03:09Z",
  "published": "2025-11-28T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/maxminddb"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2025-0132.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/oschwald/maxminddb-rust/issues/86"
    },
    {
      "type": "WEB",
      "url": "https://github.com/oschwald/maxminddb-rust/commit/98f0e4fff9678c841ed33f3b8a46322f6163c32a"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "`Reader::open_mmap` unsoundly marks unsafe memmap operation as safe"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.