Vulnerability-Lookup

UBUNTU-CVE-2021-32773 (CVE-2021-32773)

Vulnerability from osv_ubuntu – Published: 2021-07-20 00:15 – Updated: 2026-05-20 14:53 – Source website

Details

Racket is a general-purpose programming language and an ecosystem for language-oriented programming. In versions prior to 8.2, code evaluated using the Racket sandbox could cause system modules to incorrectly use attacker-created modules instead of their intended dependencies. This could allow system functions to be controlled by the attacker, giving access to facilities intended to be restricted. This problem is fixed in Racket version 8.2. A workaround is available, depending on system settings. For systems that provide arbitrary Racket evaluation, external sandboxing such as containers limit the impact of the problem. For multi-user evaluation systems, such as the handin-server system, it is not possible to work around this problem and upgrading is required.

Severity

6.1 (Medium)


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

7.5 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2021-32773	REPORT
	https://github.com/racket/racket/security/advisor…	REPORT
	https://github.com/racket/racket/commit/6ca4ffeca…	REPORT
	https://www.cve.org/CVERecord?id=CVE-2021-32773	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "plt-scheme",
            "binary_version": "6.3-1"
          },
          {
            "binary_name": "racket",
            "binary_version": "6.3-1"
          },
          {
            "binary_name": "racket-common",
            "binary_version": "6.3-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "racket",
        "purl": "pkg:deb/ubuntu/racket@6.3-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.2-2",
        "6.2-3",
        "6.3-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "racket",
            "binary_version": "6.11+dfsg1-1"
          },
          {
            "binary_name": "racket-common",
            "binary_version": "6.11+dfsg1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "racket",
        "purl": "pkg:deb/ubuntu/racket@6.11+dfsg1-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.9-2",
        "6.11+dfsg1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "racket",
            "binary_version": "7.2+dfsg1-2ubuntu3"
          },
          {
            "binary_name": "racket-common",
            "binary_version": "7.2+dfsg1-2ubuntu3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "racket",
        "purl": "pkg:deb/ubuntu/racket@7.2+dfsg1-2ubuntu3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "7.2+dfsg1-2ubuntu2",
        "7.2+dfsg1-2ubuntu3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "racket",
            "binary_version": "8.2+dfsg1-2ubuntu1"
          },
          {
            "binary_name": "racket-common",
            "binary_version": "8.2+dfsg1-2ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "racket",
        "purl": "pkg:deb/ubuntu/racket@8.2+dfsg1-2ubuntu1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "7.9+dfsg1-2build1",
        "8.2+dfsg1-2",
        "8.2+dfsg1-2ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "racket",
            "binary_version": "8.10+dfsg1-2ubuntu1"
          },
          {
            "binary_name": "racket-common",
            "binary_version": "8.10+dfsg1-2ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "racket",
        "purl": "pkg:deb/ubuntu/racket@8.10+dfsg1-2ubuntu1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.7+dfsg1-1",
        "8.10+dfsg1-2",
        "8.10+dfsg1-2ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "racket",
            "binary_version": "8.16+dfsg1-3ubuntu2"
          },
          {
            "binary_name": "racket-common",
            "binary_version": "8.16+dfsg1-3ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "racket",
        "purl": "pkg:deb/ubuntu/racket@8.16+dfsg1-3ubuntu2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.12+dfsg1-7ubuntu1",
        "8.16+dfsg1-3ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "racket",
            "binary_version": "8.18+dfsg1-1ubuntu1"
          },
          {
            "binary_name": "racket-common",
            "binary_version": "8.18+dfsg1-1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "racket",
        "purl": "pkg:deb/ubuntu/racket@8.18+dfsg1-1ubuntu1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.16+dfsg1-3ubuntu2",
        "8.18+dfsg1-1ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "Racket is a general-purpose programming language and an ecosystem for language-oriented programming. In versions prior to 8.2, code evaluated using the Racket sandbox could cause system modules to incorrectly use attacker-created modules instead of their intended dependencies. This could allow system functions to be controlled by the attacker, giving access to facilities intended to be restricted. This problem is fixed in Racket version 8.2. A workaround is available, depending on system settings. For systems that provide arbitrary Racket evaluation, external sandboxing such as containers limit the impact of the problem. For multi-user evaluation systems, such as the `handin-server` system, it is not possible to work around this problem and upgrading is required.",
  "id": "UBUNTU-CVE-2021-32773",
  "modified": "2026-05-20T14:53:21Z",
  "published": "2021-07-20T00:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-32773"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/racket/racket/security/advisories/GHSA-cgrw-p7p7-937c"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/racket/racket/commit/6ca4ffeca1e5877d44f835760ad89f18488d97e1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-32773"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-32773"
  ]
}

CVE-2021-32773 (GCVE-0-2021-32773)

Vulnerability from cvelistv5 – Published: 2021-07-19 23:55 – Updated: 2024-08-03 23:33

Title

Confused deputy attack in sandbox module resolution

Summary

Racket is a general-purpose programming language and an ecosystem for language-oriented programming. In versions prior to 8.2, code evaluated using the Racket sandbox could cause system modules to incorrectly use attacker-created modules instead of their intended dependencies. This could allow system functions to be controlled by the attacker, giving access to facilities intended to be restricted. This problem is fixed in Racket version 8.2. A workaround is available, depending on system settings. For systems that provide arbitrary Racket evaluation, external sandboxing such as containers limit the impact of the problem. For multi-user evaluation systems, such as the `handin-server` system, it is not possible to work around this problem and upgrading is required.

Severity

6.1 (Medium)


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

CWE

CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')

Assigner

GitHub_M mitre root Scorecard

References

2 references

URL	Tags
https://github.com/racket/racket/security/advisor…	x_refsource_CONFIRM
https://github.com/racket/racket/commit/6ca4ffeca…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
racket	racket	Affected: < 8.2

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2024-08-03T23:33:55.527Z",
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      "source": {
        "advisory": "GHSA-cgrw-p7p7-937c",
        "discovery": "UNKNOWN"
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      "title": "Confused deputy attack in sandbox module resolution",
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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.

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

UBUNTU-CVE-2021-32773 (CVE-2021-32773)

CVE-2021-32773 (GCVE-0-2021-32773)

Tags

Sightings

Nomenclature

Related by attack behaviour