Vulnerability-Lookup

GHSA-2GXJ-QRP2-53JV

Vulnerability from github – Published: 2022-01-06 22:11 – Updated: 2023-06-13 18:34

Summary

Incorrect reliance on Trait memory layout in mopa

Details

The mopa crate redefines the deprecated TraitObject struct from core::raw. This is done to then transmute a reference to a trait object (&dyn Trait for any trait Trait) into this struct and retrieve the data field for the purpose of downcasting. This is used to implement downcast_ref_unchecked(), in terms of which downcast_ref() is also implemented. Same goes for mutable reference downcasting and Box downcasting.

The Rust compiler explicitly reserves the right to change the memory layout of &dyn Trait for any trait Trait. The worst case scenario is that it swaps data and vtable, making an executable location breach and compromisation of ASLR possible, since reads from data would read vtable instead. Likewise, arbitrary code execution is also theoretically possible if reads of vtable generated by the compiler read data instead.

Severity ?

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "mopa"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.2.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-45695"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": true,
    "github_reviewed_at": "2022-01-06T14:22:40Z",
    "nvd_published_at": "2021-12-27T00:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "The mopa crate redefines the deprecated TraitObject struct from core::raw. This is done to then transmute a reference to a trait object (\u0026dyn Trait for any trait Trait) into this struct and retrieve the data field for the purpose of downcasting. This is used to implement downcast_ref_unchecked(), in terms of which downcast_ref() is also implemented. Same goes for mutable reference downcasting and Box downcasting.\n\nThe Rust compiler explicitly reserves the right to change the memory layout of \u0026dyn Trait for any trait Trait. The worst case scenario is that it swaps data and vtable, making an executable location breach and compromisation of ASLR possible, since reads from data would read vtable instead. Likewise, arbitrary code execution is also theoretically possible if reads of vtable generated by the compiler read data instead.",
  "id": "GHSA-2gxj-qrp2-53jv",
  "modified": "2023-06-13T18:34:26Z",
  "published": "2022-01-06T22:11:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-45695"
    },
    {
      "type": "WEB",
      "url": "https://github.com/chris-morgan/mopa/issues/13"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/chris-morgan/mopa"
    },
    {
      "type": "WEB",
      "url": "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/mopa/RUSTSEC-2021-0095.md"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0095.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Incorrect reliance on Trait memory layout in mopa"
}

CVE-2021-45695 (GCVE-0-2021-45695)

Vulnerability from cvelistv5 – Published: 2021-12-26 21:50 – Updated: 2024-08-04 04:47

Summary

An issue was discovered in the mopa crate through 2021-06-01 for Rust. It incorrectly relies on Trait memory layout, possibly leading to future occurrences of arbitrary code execution or ASLR bypass.

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	https://rustsec.org/advisories/RUSTSEC-2021-0095.html	x_refsource_MISC
	https://raw.githubusercontent.com/rustsec/advisor…	x_refsource_MISC

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T04:47:02.088Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://rustsec.org/advisories/RUSTSEC-2021-0095.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/mopa/RUSTSEC-2021-0095.md"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An issue was discovered in the mopa crate through 2021-06-01 for Rust. It incorrectly relies on Trait memory layout, possibly leading to future occurrences of arbitrary code execution or ASLR bypass."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-12-26T21:50:16",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://rustsec.org/advisories/RUSTSEC-2021-0095.html"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/mopa/RUSTSEC-2021-0095.md"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-45695",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "An issue was discovered in the mopa crate through 2021-06-01 for Rust. It incorrectly relies on Trait memory layout, possibly leading to future occurrences of arbitrary code execution or ASLR bypass."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://rustsec.org/advisories/RUSTSEC-2021-0095.html",
              "refsource": "MISC",
              "url": "https://rustsec.org/advisories/RUSTSEC-2021-0095.html"
            },
            {
              "name": "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/mopa/RUSTSEC-2021-0095.md",
              "refsource": "MISC",
              "url": "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/mopa/RUSTSEC-2021-0095.md"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-45695",
    "datePublished": "2021-12-26T21:50:16",
    "dateReserved": "2021-12-26T00:00:00",
    "dateUpdated": "2024-08-04T04:47:02.088Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

ghsa-2gxj-qrp2-53jv

Vulnerability from osv_rustsec

Published

2021-06-01 12:00

Modified

2023-06-13 13:10

Summary

`mopa` is technically unsound

Details

The mopa crate redefines the deprecated TraitObject struct from core::raw like so:

#[repr(C)]
#[derive(Copy, Clone)]
#[doc(hidden)]
pub struct TraitObject {
    pub data: *mut (),
    pub vtable: *mut (),
}

This is done to then transmute a reference to a trait object (&dyn Trait for any trait Trait) into this struct and retrieve the data field for the purpose of downcasting. This is used to implement downcast_ref_unchecked(), in terms of which downcast_ref() is also implemented. Same goes for mutable reference downcasting and Box downcasting.

The Rust compiler explicitly reserves the right to change the memory layout of &dyn Trait for any trait Trait. The worst case scenario is that it swaps data and vtable, making an executable location breach and compromisation of ASLR possible, since reads from data would read vtable instead. Likewise, arbitrary code execution is also theoretically possible if reads of vtable generated by the compiler read data instead.

While, as of Rust 1.52, this unsound assumption still holds true, updating the compiler may silently create UB in a crate which previously compiled and run without issues, compromising the security of builds which are believed to be reproducible.

A potential strategy to resolve this has already been suggested in an issue on the GitHub repository of the crate.

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "memory-corruption",
          "memory-exposure",
          "code-execution"
        ],
        "cvss": null,
        "informational": "unsound"
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "mopa",
        "purl": "pkg:cargo/mopa"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2021-45695",
    "GHSA-2gxj-qrp2-53jv",
    "GHSA-8mv5-7x95-7wcf"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "The `mopa` crate redefines the deprecated `TraitObject` struct from `core::raw` like so:\n```rust\n#[repr(C)]\n#[derive(Copy, Clone)]\n#[doc(hidden)]\npub struct TraitObject {\n    pub data: *mut (),\n    pub vtable: *mut (),\n}\n```\nThis is done to then transmute a reference to a trait object (`\u0026dyn Trait` for any trait `Trait`) into this struct and retrieve the `data` field for the purpose of downcasting. This is used to implement `downcast_ref_unchecked()`, in terms of which `downcast_ref()` is also implemented. Same goes for mutable reference downcasting and `Box` downcasting.\n\nThe Rust compiler explicitly reserves the right to change the memory layout of `\u0026dyn Trait` for any trait `Trait`. The worst case scenario is that it swaps `data` and `vtable`, making an executable location breach and compromisation of ASLR possible, since reads from `data` would read `vtable` instead. Likewise, arbitrary code execution is also theoretically possible if reads of `vtable` generated by the compiler read `data` instead.\n\nWhile, as of Rust 1.52, this unsound assumption still holds true, updating the compiler may silently create UB in a crate which previously compiled and run without issues, compromising the security of builds which are believed to be reproducible.\n\nA potential strategy to resolve this has already been suggested in an issue on the GitHub repository of the crate.",
  "id": "RUSTSEC-2021-0095",
  "modified": "2023-06-13T13:10:24Z",
  "published": "2021-06-01T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/mopa"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0095.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/chris-morgan/mopa/issues/13"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "`mopa` is technically unsound"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-2GXJ-QRP2-53JV

CVE-2021-45695 (GCVE-0-2021-45695)

ghsa-2gxj-qrp2-53jv

Vulnerability from osv_rustsec

Tags

Sightings

Nomenclature