Vulnerability-Lookup

GHSA-4MH8-9689-38VR

Vulnerability from github – Published: 2024-07-25 21:31 – Updated: 2024-08-07 15:10

Summary

snapd failed to restrict writes to the $HOME/bin path

Details

In snapd versions prior to 2.62, when using AppArmor for enforcement of sandbox permissions, snapd failed to restrict writes to the $HOME/bin path. In Ubuntu, when this path exists, it is automatically added to the users PATH. An attacker who could convince a user to install a malicious snap which used the 'home' plug could use this vulnerability to install arbitrary scripts into the users PATH which may then be run by the user outside of the expected snap sandbox and hence allow them to escape confinement.

Severity

6.3 (Medium)


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

Show details on source website

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/snapcore/snapd"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.62"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-1724"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-732"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-07-26T21:34:22Z",
    "nvd_published_at": "2024-07-25T19:15:09Z",
    "severity": "MODERATE"
  },
  "details": "In snapd versions prior to 2.62, when using AppArmor for enforcement of sandbox permissions, snapd failed to restrict writes to the $HOME/bin path. In Ubuntu, when this path exists, it is automatically added to the users PATH. An attacker who could convince a user to install a malicious snap which used the \u0027home\u0027 plug could use this vulnerability to install arbitrary scripts into the users PATH which may then be run by the user outside of the expected snap sandbox and hence allow them to escape confinement.",
  "id": "GHSA-4mh8-9689-38vr",
  "modified": "2024-08-07T15:10:52Z",
  "published": "2024-07-25T21:31:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-1724"
    },
    {
      "type": "WEB",
      "url": "https://github.com/snapcore/snapd/pull/13689"
    },
    {
      "type": "WEB",
      "url": "https://github.com/snapcore/snapd/commit/aa191f97713de8dc3ce3ac818539f0b976eb8ef6"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/snapcore/snapd"
    },
    {
      "type": "WEB",
      "url": "https://gld.mcphail.uk/posts/explaining-cve-2024-1724"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2024-3007"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "snapd failed to restrict writes to the $HOME/bin path"
}

CVE-2024-1724 (GCVE-0-2024-1724)

Vulnerability from cvelistv5 – Published: 2024-07-25 19:05 – Updated: 2024-08-01 18:48

Title

snapd allows $HOME/bin symlink

Summary

Severity

6.3 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-07-25 19:25 UTC

CWE

CWE-732 - Incorrect Permission Assignment for Critical Resource

Assigner

canonical mitre root

References

3 references

URL	Tags
https://github.com/snapcore/snapd/commit/aa191f97…
https://gld.mcphail.uk/posts/explaining-cve-2024-1724/
https://github.com/snapcore/snapd/pull/13689

Impacted products

2 products

Vendor	Product	Version
Canonical	snap	Affected: 0 , < 2.62 (custom)
canonical	snapd	Affected: 0 , < 2.62 (custom) cpe:2.3:a:canonical:snapd::::::::

Date Public

2024-03-13 08:27

Credits

Neil McPhail

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unaffected",
            "product": "snapd",
            "vendor": "canonical",
            "versions": [
              {
                "lessThan": "2.62",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-1724",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-07-25T19:25:43.941220Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-07-25T19:28:23.939Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-01T18:48:21.887Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/snapcore/snapd/commit/aa191f97713de8dc3ce3ac818539f0b976eb8ef6"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://gld.mcphail.uk/posts/explaining-cve-2024-1724/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/snapcore/snapd/pull/13689"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "Generated AppArmor policy"
          ],
          "packageName": "snapd",
          "platforms": [
            "Linux"
          ],
          "product": "snap",
          "programFiles": [
            "interfaces/builtin/home.go"
          ],
          "programRoutines": [
            {
              "name": "homeConnectedPlugAppArmor"
            }
          ],
          "repo": "https://github.com/snapcore/snapd/",
          "vendor": "Canonical",
          "versions": [
            {
              "lessThan": "2.62",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Neil McPhail"
        }
      ],
      "datePublic": "2024-03-13T08:27:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "In snapd versions prior to 2.62, when using AppArmor for enforcement of \nsandbox permissions, snapd failed to restrict writes to the $HOME/bin\npath. In Ubuntu, when this path exists, it is automatically added to\nthe users PATH. An attacker who could convince a user to install a\nmalicious snap which used the \u0027home\u0027 plug could use this vulnerability\nto install arbitrary scripts into the users PATH which may then be run\nby the user outside of the expected snap sandbox and hence allow them\nto escape confinement."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-1",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-732",
              "description": "CWE-732 Incorrect Permission Assignment for Critical Resource",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-07-25T19:13:07.140Z",
        "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
        "shortName": "canonical"
      },
      "references": [
        {
          "url": "https://github.com/snapcore/snapd/commit/aa191f97713de8dc3ce3ac818539f0b976eb8ef6"
        },
        {
          "url": "https://gld.mcphail.uk/posts/explaining-cve-2024-1724/"
        },
        {
          "url": "https://github.com/snapcore/snapd/pull/13689"
        }
      ],
      "title": "snapd allows $HOME/bin symlink"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
    "assignerShortName": "canonical",
    "cveId": "CVE-2024-1724",
    "datePublished": "2024-07-25T19:05:23.299Z",
    "dateReserved": "2024-02-21T19:46:47.236Z",
    "dateUpdated": "2024-08-01T18:48:21.887Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.