pysec - pysec-2022-42993

PYSEC-2022-42993

Vulnerability from pysec - Published: 2022-12-16 23:15 - Updated: 2023-05-04 04:29

Details

GuardDog is a CLI tool to identify malicious PyPI packages. Versions prior to v0.1.8 are vulnerable to arbitrary file write when scanning a specially-crafted remote PyPI package. Extracting files using shutil.unpack_archive() from a potentially malicious tarball without validating that the destination file path is within the intended destination directory can cause files outside the destination directory to be overwritten. This issue is patched in version 0.1.8. Potential workarounds include using a safer module, like zipfile, and validating the location of the extracted files and discarding those with malicious paths.

Impacted products

Name	purl
guarddog	pkg:pypi/guarddog

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "guarddog",
        "purl": "pkg:pypi/guarddog"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "37c7d0767ba28f4df46117d478f97652594c491c"
            }
          ],
          "repo": "https://github.com/DataDog/guarddog",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.1.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.1.1",
        "0.1.3",
        "0.1.4",
        "0.1.5",
        "0.1.6",
        "0.1.7"
      ]
    }
  ],
  "aliases": [
    "CVE-2022-23530",
    "GHSA-78m5-jpmf-ch7v"
  ],
  "details": "GuardDog is a CLI tool to identify malicious PyPI packages. Versions prior to v0.1.8 are vulnerable to arbitrary file write when scanning a specially-crafted remote PyPI package. Extracting files using shutil.unpack_archive() from a potentially malicious tarball without validating that the destination file path is within the intended destination directory can cause files outside the destination directory to be overwritten. This issue is patched in version 0.1.8. Potential workarounds include using a safer module, like zipfile, and validating the location of the extracted files and discarding those with malicious paths.",
  "id": "PYSEC-2022-42993",
  "modified": "2023-05-04T04:29:25.550921Z",
  "published": "2022-12-16T23:15:00Z",
  "references": [
    {
      "type": "EVIDENCE",
      "url": "https://github.com/DataDog/guarddog/blob/a1d064ceb09d39bb28deb6972bc0a278756ea91f/guarddog/scanners/package_scanner.py#L153..158"
    },
    {
      "type": "WEB",
      "url": "https://github.com/DataDog/guarddog/blob/a1d064ceb09d39bb28deb6972bc0a278756ea91f/guarddog/scanners/package_scanner.py#L153..158"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/DataDog/guarddog/security/advisories/GHSA-78m5-jpmf-ch7v"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/DataDog/guarddog/security/advisories/GHSA-78m5-jpmf-ch7v"
    },
    {
      "type": "FIX",
      "url": "https://github.com/DataDog/guarddog/commit/37c7d0767ba28f4df46117d478f97652594c491c"
    }
  ]
}

CVE-2022-23530 (GCVE-0-2022-23530)

Vulnerability from cvelistv5 – Published: 2022-12-16 22:56 – Updated: 2025-04-17 14:34

Summary

Severity ?

5.8 (Medium)


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

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M

References

URL

Tags

	https://github.com/DataDog/guarddog/security/advi…	x_refsource_CONFIRM
	https://github.com/DataDog/guarddog/commit/37c7d0…	x_refsource_MISC
	https://github.com/DataDog/guarddog/blob/a1d064ce…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	DataDog	guarddog	Affected: < 0.1.8

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T03:43:46.472Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "https://github.com/DataDog/guarddog/security/advisories/GHSA-78m5-jpmf-ch7v",
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/DataDog/guarddog/security/advisories/GHSA-78m5-jpmf-ch7v"
          },
          {
            "name": "https://github.com/DataDog/guarddog/commit/37c7d0767ba28f4df46117d478f97652594c491c",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/DataDog/guarddog/commit/37c7d0767ba28f4df46117d478f97652594c491c"
          },
          {
            "name": "https://github.com/DataDog/guarddog/blob/a1d064ceb09d39bb28deb6972bc0a278756ea91f/guarddog/scanners/package_scanner.py#L153..158",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/DataDog/guarddog/blob/a1d064ceb09d39bb28deb6972bc0a278756ea91f/guarddog/scanners/package_scanner.py#L153..158"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-23530",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-04-17T14:34:18.663488Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-04-17T14:34:26.895Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "guarddog",
          "vendor": "DataDog",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.1.8"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "GuardDog is a CLI tool to identify malicious PyPI packages. Versions prior to v0.1.8 are vulnerable to arbitrary file write when scanning a specially-crafted remote PyPI package. Extracting files using shutil.unpack_archive() from a potentially malicious tarball without validating that the destination file path is within the intended destination directory can cause files outside the destination directory to be overwritten.  This issue is patched in version 0.1.8. Potential workarounds include using a safer module, like zipfile, and validating the location of the extracted files and discarding those with malicious paths."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-12-16T22:56:33.204Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/DataDog/guarddog/security/advisories/GHSA-78m5-jpmf-ch7v",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/DataDog/guarddog/security/advisories/GHSA-78m5-jpmf-ch7v"
        },
        {
          "name": "https://github.com/DataDog/guarddog/commit/37c7d0767ba28f4df46117d478f97652594c491c",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/DataDog/guarddog/commit/37c7d0767ba28f4df46117d478f97652594c491c"
        },
        {
          "name": "https://github.com/DataDog/guarddog/blob/a1d064ceb09d39bb28deb6972bc0a278756ea91f/guarddog/scanners/package_scanner.py#L153..158",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/DataDog/guarddog/blob/a1d064ceb09d39bb28deb6972bc0a278756ea91f/guarddog/scanners/package_scanner.py#L153..158"
        }
      ],
      "source": {
        "advisory": "GHSA-78m5-jpmf-ch7v",
        "discovery": "UNKNOWN"
      },
      "title": "GuardDog vulnerable to arbitrary file write when scanning a specially-crafted remote PyPI package"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2022-23530",
    "datePublished": "2022-12-16T22:56:33.204Z",
    "dateReserved": "2022-01-19T21:23:53.786Z",
    "dateUpdated": "2025-04-17T14:34:26.895Z",
    "requesterUserId": "c184a3d9-dc98-4c48-a45b-d2d88cf0ac74",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

GHSA-78M5-JPMF-CH7V

Vulnerability from github – Published: 2022-12-05 23:34 – Updated: 2024-11-18 16:26

Summary

GuardDog vulnerable to arbitrary file write when scanning a specially-crafted remote PyPI package

Details

Summary

Unsafe extracting using shutil.unpack_archive() from a remotely retrieved tarball may lead to writing the extracted file to an unintended destination.

Details

Extracting files using shutil.unpack_archive() from a potentially malicious tarball without validating that the destination file path is within the intended destination directory can cause files outside the destination directory to be overwritten.

The vulnerable code snippet is between L153..158.

response = requests.get(url, stream=True)

with open(zippath, "wb") as f:
      f.write(response.raw.read())

shutil.unpack_archive(zippath, unzippedpath)

It seems that a remotely retrieved tarball which could be with the extension .tar.gz happens to be unpacked using shutil.unpack_archive() with no destination verification/limitation of the extracted files.

PoC

The PoC provided showcases the risk of extracting the non-harmless text file sim4n6.txt to a parent location rather than the current folder.

> tar --list -f archive.tar
tar: Removing leading `../../../' from member names
../../../sim4n6.txt

> python3 
Python 3.10.6 (main, Nov  2 2022, 18:53:38) [GCC 11.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import shutil
>>> shutil.unpack_archive("archive.tar")
>>> exit()

> file ../../../sim4n6.txt
../../../sim4n6.txt: ASCII text

A Potential Attack Scenario

An attacker may craft a malicious tarball with a filename path, such as ../../../../../../../../etc/passwd, and then serve the archive remotely, thus, providing a possibility to overwrite the system files.

Mitigation

Potential mitigation could be to: - Use a safer module, like zipfile. - Validate the location of the extracted files and discard those with malicious paths such as a relative path .. or absolute ones.

Severity ?

5.8 (Medium)


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

2.3 (Low)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.1.7"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "guarddog"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.1.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-23530"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-12-05T23:34:43Z",
    "nvd_published_at": "2022-12-16T23:15:00Z",
    "severity": "LOW"
  },
  "details": "### Summary\n\nUnsafe extracting using `shutil.unpack_archive()` from a remotely retrieved tarball may lead to writing the extracted file to an unintended destination.\n\n### Details\n\nExtracting files using `shutil.unpack_archive()` from a potentially malicious tarball without validating that the destination file path is within the intended destination directory can cause files outside the destination directory to be overwritten.  \n\nThe vulnerable code snippet is between [L153..158](https://github.com/DataDog/guarddog/blob/a1d064ceb09d39bb28deb6972bc0a278756ea91f/guarddog/scanners/package_scanner.py#L153..158). \n\n```python\nresponse = requests.get(url, stream=True)\n\nwith open(zippath, \"wb\") as f:\n      f.write(response.raw.read())\n\nshutil.unpack_archive(zippath, unzippedpath)\n```\nIt seems that a remotely retrieved tarball which could be with the extension `.tar.gz` happens to be unpacked using `shutil.unpack_archive()` with no destination verification/limitation of the extracted files.\n\n### PoC\n\nThe PoC provided showcases the risk of extracting the non-harmless text file `sim4n6.txt` to a parent location rather than the current folder. \n\n```bash\n\u003e tar --list -f archive.tar\ntar: Removing leading `../../../\u0027 from member names\n../../../sim4n6.txt\n\n\u003e python3 \nPython 3.10.6 (main, Nov  2 2022, 18:53:38) [GCC 11.3.0] on linux\nType \"help\", \"copyright\", \"credits\" or \"license\" for more information.\n\u003e\u003e\u003e import shutil\n\u003e\u003e\u003e shutil.unpack_archive(\"archive.tar\")\n\u003e\u003e\u003e exit()\n\n\u003e file ../../../sim4n6.txt\n../../../sim4n6.txt: ASCII text\n```\n\n### A Potential Attack Scenario\n\n- An attacker may craft a malicious tarball with a filename path, such as `../../../../../../../../etc/passwd`, and then serve the archive remotely, thus, providing a possibility to overwrite the system files.\n\n### Mitigation\n\nPotential mitigation could be to:\n- Use a safer module, like `zipfile`.\n- Validate the location of the extracted files and discard those with malicious paths such as a relative path `..` or absolute ones. ",
  "id": "GHSA-78m5-jpmf-ch7v",
  "modified": "2024-11-18T16:26:28Z",
  "published": "2022-12-05T23:34:43Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/DataDog/guarddog/security/advisories/GHSA-78m5-jpmf-ch7v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-23530"
    },
    {
      "type": "WEB",
      "url": "https://github.com/DataDog/guarddog/commit/37c7d0767ba28f4df46117d478f97652594c491c"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/DataDog/guarddog"
    },
    {
      "type": "WEB",
      "url": "https://github.com/DataDog/guarddog/blob/a1d064ceb09d39bb28deb6972bc0a278756ea91f/guarddog/scanners/package_scanner.py#L153..158"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/guarddog/PYSEC-2022-42993.yaml"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L",
      "type": "CVSS_V4"
    }
  ],
  "summary": "GuardDog vulnerable to arbitrary file write when scanning a specially-crafted remote PyPI package"
}

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

PYSEC-2022-42993

CVE-2022-23530 (GCVE-0-2022-23530)

GHSA-78M5-JPMF-CH7V

Summary

Details

PoC

A Potential Attack Scenario

Mitigation

Tags

Sightings

Nomenclature