Vulnerability-Lookup

rustsec-2025-0051

Vulnerability from osv_rustsec

Published

2025-08-05 12:00

Modified

2025-10-28 06:02

Summary

`xcb::Connection::connect_to_fd*` functions violate I/O safety

Details

The API of xcb::Connection has constructors which allow an arbitrary RawFd to be used as a socket connection. On either failure of these constructors or on the drop of Connection, it closes the associated file descriptor. Thus, a program which uses an OwnedFd (such as a UnixStream) as the file descriptor can close the file descriptor and continue to attempt using it or close an already-closed file descriptor, violating I/O safety.

Starting in version 1.6.0, xcb provides Connection::connect_with_fd and Connection::connect_with_fd_and_extensions as safe alternatives and deprecates the problematic functions.

References

URL

Type

	https://crates.io/crates/xcb	PACKAGE
	https://rustsec.org/advisories/RUSTSEC-2025-0051.html	ADVISORY
	https://github.com/rust-x-bindings/rust-xcb/issues/282	REPORT
	https://github.com/rust-x-bindings/rust-xcb/issues/167	REPORT
	https://github.com/rust-x-bindings/rust-xcb/pull/283	WEB

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": null,
        "informational": "unsound"
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [
            "xcb::Connection::connect_to_fd",
            "xcb::Connection::connect_to_fd_with_extensions"
          ],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "xcb",
        "purl": "pkg:cargo/xcb"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "1.6.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "GHSA-655h-hg88-5qmf"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "The API of `xcb::Connection` has constructors which allow an arbitrary `RawFd`\nto be used as a socket connection. On either failure of these constructors or\non the drop of `Connection`, it closes the associated file descriptor. Thus, a\nprogram which uses an `OwnedFd` (such as a `UnixStream`) as the file descriptor\ncan close the file descriptor and continue to attempt using it or close an\nalready-closed file descriptor, violating I/O safety.\n\nStarting in version 1.6.0, `xcb` provides `Connection::connect_with_fd` and\n`Connection::connect_with_fd_and_extensions` as safe alternatives and\ndeprecates the problematic functions.",
  "id": "RUSTSEC-2025-0051",
  "modified": "2025-10-28T06:02:18Z",
  "published": "2025-08-05T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/xcb"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2025-0051.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/rust-x-bindings/rust-xcb/issues/282"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/rust-x-bindings/rust-xcb/issues/167"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rust-x-bindings/rust-xcb/pull/283"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "`xcb::Connection::connect_to_fd*` functions violate I/O safety"
}

GHSA-655H-HG88-5QMF

Vulnerability from github – Published: 2025-08-22 17:34 – Updated: 2025-08-22 17:34

Summary

Rust XCB `xcb::Connection::connect_to_fd*` functions violate I/O safety

Details

Starting in version 1.6.0, xcb provides Connection::connect_with_fd and Connection::connect_with_fd_and_extensions as safe alternatives and deprecates the problematic functions.

Severity

1.7 (Low)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "xcb"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-666",
      "CWE-672"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-08-22T17:34:45Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "The API of `xcb::Connection` has constructors which allow an arbitrary `RawFd` to be used as a socket connection. On either failure of these constructors or on the drop of `Connection`, it closes the associated file descriptor. Thus, a program which uses an `OwnedFd` (such as a `UnixStream`) as the file descriptor can close the file descriptor and continue to attempt using it or close an already-closed file descriptor, violating I/O safety.\n\nStarting in version 1.6.0, `xcb` provides `Connection::connect_with_fd` and `Connection::connect_with_fd_and_extensions` as safe alternatives and deprecates the problematic functions.",
  "id": "GHSA-655h-hg88-5qmf",
  "modified": "2025-08-22T17:34:45Z",
  "published": "2025-08-22T17:34:45Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/rust-x-bindings/rust-xcb/issues/167"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rust-x-bindings/rust-xcb/issues/282"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rust-x-bindings/rust-xcb/pull/283"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rustsec/advisory-db/pull/2355"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rust-x-bindings/rust-xcb/commit/da830976870c1174e3b33eb0643177be3991c002"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/rust-x-bindings/rust-xcb"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2025-0051.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Rust XCB `xcb::Connection::connect_to_fd*` functions violate I/O safety"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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