Vulnerability-Lookup

CVE-2020-35899 (GCVE-0-2020-35899)

Vulnerability from cvelistv5 – Published: 2020-12-31 08:22 – Updated: 2024-08-04 17:16

Summary

An issue was discovered in the actix-service crate before 1.0.6 for Rust. The Cell implementation allows obtaining more than one mutable reference to the same data.

Severity

5.5 (Medium)


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

CWE

Assigner

mitre mitre root

References

1 reference

URL	Tags
https://rustsec.org/advisories/RUSTSEC-2020-0046.html	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2020-35899

Vulnerability from fkie_nvd - Published: 2020-12-31 09:15 - Updated: 2026-06-17 03:14

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

An issue was discovered in the actix-service crate before 1.0.6 for Rust. The Cell implementation allows obtaining more than one mutable reference to the same data.

References

	URL	Tags
	cve@mitre.org	https://rustsec.org/advisories/RUSTSEC-2020-0046.html	Exploit, Third Party Advisory
	af854a3a-2127-422b-91ae-364da2661108	https://rustsec.org/advisories/RUSTSEC-2020-0046.html	Exploit, Third Party Advisory

Impacted products

	Vendor	Product	Version
	actix	actix-service	*

JSON

To clipboard

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  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
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  "lastModified": "2026-06-17T03:14:33.887",
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GHSA-WHC7-5P35-4WW2

Vulnerability from github – Published: 2021-08-25 20:49 – Updated: 2025-05-23 18:31

Summary

Use after free in actix-service

Details

An issue was discovered in the actix-service crate before 1.0.6 for Rust. The Cell implementation allows obtaining more than one mutable reference to the same data.

Severity

5.5 (Medium)


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

Show details on source website

JSON

To clipboard

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        "name": "actix-service"
      },
      "ranges": [
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            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-35899"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-19T20:54:21Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
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  "id": "GHSA-whc7-5p35-4ww2",
  "modified": "2025-05-23T18:31:05Z",
  "published": "2021-08-25T20:49:06Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-35899"
    },
    {
      "type": "WEB",
      "url": "https://github.com/actix/actix-net/pull/158"
    },
    {
      "type": "WEB",
      "url": "https://github.com/actix/actix-net/commit/a67e38b4a07c92a3c81fa833f9eb1e91e74e39b7"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/actix/actix-net"
    },
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    }
  ],
  "summary": "Use after free in actix-service"
}

GSD-2020-35899

Vulnerability from gsd - Updated: 2023-12-13 01:22

Details

An issue was discovered in the actix-service crate before 1.0.6 for Rust. The Cell implementation allows obtaining more than one mutable reference to the same data.

Aliases

CVE-2020-35899

Aliases

CVE-2020-35899

JSON

To clipboard

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    "id": "GSD-2020-35899"
  },
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      "remediation": "unknown",
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            "version": "3.1"
          },
          "exploitabilityScore": 1.8,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2021-01-06T20:32Z",
      "publishedDate": "2020-12-31T09:15Z"
    }
  }
}

rustsec-2020-0046

Vulnerability from osv_rustsec

Published

2020-01-08 12:00

Modified

2023-06-13 13:10

Summary

bespoke Cell implementation allows obtaining several mutable references to the same data

Details

The custom implementation of a Cell primitive in the affected versions of this crate does not keep track of mutable references to the underlying data.

This allows obtaining several mutable references to the same object which may result in arbitrary memory corruption, most likely use-after-free.

The flaw was corrected by switching from a bespoke Cell<T> implementation to Rc<RefCell<T>>.

Severity

5.5 (Medium)


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

References

URL

Type

	https://crates.io/crates/actix-service	PACKAGE
	https://rustsec.org/advisories/RUSTSEC-2020-0046.html	ADVISORY
	https://github.com/actix/actix-net/pull/158	WEB

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "memory-corruption"
        ],
        "cvss": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
        "informational": "unsound"
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "actix-service",
        "purl": "pkg:cargo/actix-service"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "1.0.6"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2020-35899",
    "GHSA-whc7-5p35-4ww2"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "The custom implementation of a Cell primitive in the affected versions of this crate\ndoes not keep track of mutable references to the underlying data.\n\nThis allows obtaining several mutable references to the same object\nwhich may result in arbitrary memory corruption, most likely use-after-free.\n\nThe flaw was corrected by switching from a bespoke `Cell\u003cT\u003e` implementation to `Rc\u003cRefCell\u003cT\u003e\u003e`.",
  "id": "RUSTSEC-2020-0046",
  "modified": "2023-06-13T13:10:24Z",
  "published": "2020-01-08T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/actix-service"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2020-0046.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/actix/actix-net/pull/158"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "bespoke Cell implementation allows obtaining several mutable references to the same data"
}

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

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2020-35899 (GCVE-0-2020-35899)

FKIE_CVE-2020-35899

GHSA-WHC7-5P35-4WW2

GSD-2020-35899

rustsec-2020-0046

Vulnerability from osv_rustsec

Tags

Sightings

Nomenclature

Related by attack behaviour