github - ghsa-m445-w3xr-vp2f

ghsa-m445-w3xr-vp2f

Vulnerability from github

Published

2024-08-02 12:51

Modified

2024-08-07 19:26

Severity ?

8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
8.6 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Summary

soft-serve vulnerable to arbitrary code execution by crafting git-lfs requests

Details

Impact

Any servers using soft-serve server and git

Patches

0.7.5

Workarounds

None.

References

n/a.

It is possible for a user who can commit files to a repository hosted by Soft Serve to execute arbitrary code via environment manipulation and Git.

The issue is that Soft Serve passes all environment variables given by the client to git subprocesses. This includes environment variables that control program execution, such as LD_PRELOAD.

This can be exploited to execute arbitrary code by, for example, uploading a malicious shared object file to Soft Serve via Git LFS (uploading it via LFS ensures that it is not compressed on disk and easier to work with). The file will be stored under its SHA256 hash, so it has a predictable name.

This file can then be referenced in LD_PRELOAD via a Soft Serve SSH session that causes git to be invoked. For example:

bash LD_PRELOAD=/.../data/lfs/1/objects/a2/b5/a2b585befededf5f95363d06d83655229e393b1b45f76d9f989a336668665a2f ssh server git-upload-pack repo

The example LFS file patches a shared library function called by git to execute a shell.

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/charmbracelet/soft-serve"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.7.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-41956"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-78"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-08-02T12:51:12Z",
    "nvd_published_at": "2024-08-01T22:15:29Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nAny servers using soft-serve server and git\n\n### Patches\n\u003e0.7.5\n\n### Workarounds\nNone.\n\n### References\nn/a.\n\n---\n\nIt is possible for a user who can commit files to a repository hosted by Soft Serve to execute arbitrary code via environment manipulation and Git.\n\nThe issue is that Soft Serve passes all environment variables given by the client to git subprocesses. This includes environment variables that control program execution, such as `LD_PRELOAD`.\n\nThis can be exploited to execute arbitrary code by, for example, uploading a malicious shared object file to Soft Serve via Git LFS (uploading it via LFS ensures that it is not compressed on disk and easier to work with). The file will be stored under its SHA256 hash, so it has a predictable name.\n\nThis file can then be referenced in `LD_PRELOAD` via a Soft Serve SSH session that causes git to be invoked. For example:\n\n```bash\nLD_PRELOAD=/.../data/lfs/1/objects/a2/b5/a2b585befededf5f95363d06d83655229e393b1b45f76d9f989a336668665a2f ssh server git-upload-pack repo\n```\n\nThe example LFS file patches a shared library function called by git to execute a shell.",
  "id": "GHSA-m445-w3xr-vp2f",
  "modified": "2024-08-07T19:26:34Z",
  "published": "2024-08-02T12:51:12Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/charmbracelet/soft-serve/security/advisories/GHSA-m445-w3xr-vp2f"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-41956"
    },
    {
      "type": "WEB",
      "url": "https://github.com/charmbracelet/soft-serve/commit/4daebdd422a6ba8c04162d023f8be355a8fe3184"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/charmbracelet/soft-serve"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2024-3019"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "soft-serve vulnerable to arbitrary code execution by crafting git-lfs requests"
}

CVE-2024-41956 (GCVE-0-2024-41956)

Vulnerability from cvelistv5

Published

2024-08-01 22:07

Modified

2024-08-02 14:47

Severity ?

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

CWE

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Summary

Soft Serve is a self-hostable Git server for the command line. Prior to 0.7.5, it is possible for a user who can commit files to a repository hosted by Soft Serve to execute arbitrary code via environment manipulation and Git. The issue is that Soft Serve passes all environment variables given by the client to git subprocesses. This includes environment variables that control program execution, such as LD_PRELOAD. This vulnerability is fixed in 0.7.5.

References

►

URL

Tags

	https://github.com/charmbracelet/soft-serve/security/advisories/GHSA-m445-w3xr-vp2f	x_refsource_CONFIRM
	https://github.com/charmbracelet/soft-serve/commit/4daebdd422a6ba8c04162d023f8be355a8fe3184	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	charmbracelet	soft-serve	Version: < 0.7.5

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:charmbracelet:soft-serve:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "soft-serve",
            "vendor": "charmbracelet",
            "versions": [
              {
                "lessThan": "0.7.5",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-41956",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-08-02T14:45:52.445103Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-08-02T14:47:38.561Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "soft-serve",
          "vendor": "charmbracelet",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.7.5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Soft Serve is a self-hostable Git server for the command line. Prior to 0.7.5, it is possible for a user who can commit files to a repository hosted by Soft Serve to execute arbitrary code via environment manipulation and Git. The issue is that Soft Serve passes all environment variables given by the client to git subprocesses. This includes environment variables that control program execution, such as LD_PRELOAD. This vulnerability is fixed in 0.7.5."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-78",
              "description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-08-01T22:07:32.899Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/charmbracelet/soft-serve/security/advisories/GHSA-m445-w3xr-vp2f",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/charmbracelet/soft-serve/security/advisories/GHSA-m445-w3xr-vp2f"
        },
        {
          "name": "https://github.com/charmbracelet/soft-serve/commit/4daebdd422a6ba8c04162d023f8be355a8fe3184",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/charmbracelet/soft-serve/commit/4daebdd422a6ba8c04162d023f8be355a8fe3184"
        }
      ],
      "source": {
        "advisory": "GHSA-m445-w3xr-vp2f",
        "discovery": "UNKNOWN"
      },
      "title": "Soft Serve allows arbitrary code execution by crafting git-lfs requests"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2024-41956",
    "datePublished": "2024-08-01T22:07:32.899Z",
    "dateReserved": "2024-07-24T16:51:40.950Z",
    "dateUpdated": "2024-08-02T14:47:38.561Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted

ghsa-m445-w3xr-vp2f

Vulnerability from github

Impact

Patches

Workarounds

References

CVE-2024-41956 (GCVE-0-2024-41956)

Vulnerability from cvelistv5

Tags

Sightings

Nomenclature