rustsec-2021-0112
Vulnerability from osv_rustsec
Published
2021-02-17 12:00
Modified
2023-06-13 13:10
Summary
`Read` on uninitialized buffer may cause UB ('tectonic_xdv' crate)
Details

Affected versions of this crate passes an uninitialized buffer to a user-provided Read implementation.

Arbitrary Read implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.

The problem was fixed in commit cdff034 by zero-initializing the buffer before passing it to a user-provided Read implementation.

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{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "memory-exposure"
        ],
        "cvss": null,
        "informational": "unsound"
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "tectonic_xdv",
        "purl": "pkg:cargo/tectonic_xdv"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.1.12"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2021-45703",
    "GHSA-6692-8qqf-79jc",
    "GHSA-qwvx-c8j7-5g75"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "Affected versions of this crate passes an uninitialized buffer to a user-provided `Read` implementation.\n\nArbitrary `Read` implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.\n\nThe problem was fixed in commit `cdff034` by zero-initializing the buffer before passing it to a user-provided `Read` implementation.",
  "id": "RUSTSEC-2021-0112",
  "modified": "2023-06-13T13:10:24Z",
  "published": "2021-02-17T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/tectonic_xdv"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0112.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/tectonic-typesetting/tectonic/issues/752"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "`Read` on uninitialized buffer may cause UB (\u0027tectonic_xdv\u0027 crate)"
}


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