GHSA-m445-w3xr-vp2f

Source

https://github.com/advisories/GHSA-m445-w3xr-vp2f

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/08/GHSA-m445-w3xr-vp2f/GHSA-m445-w3xr-vp2f.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-m445-w3xr-vp2f

Aliases

Published

2024-08-02T12:51:12Z

Modified

2024-08-07T19:26:34Z

Severity

8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
8.6 (High) CVSS_V4 - 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 CVSS Calculator

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:

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.

Database specific

{
    "nvd_published_at": "2024-08-01T22:15:29Z",
    "cwe_ids": [
        "CWE-78"
    ],
    "severity": "HIGH",
    "github_reviewed": true,
    "github_reviewed_at": "2024-08-02T12:51:12Z"
}

References

Affected packages

Go / github.com/charmbracelet/soft-serve

Package

Name: github.com/charmbracelet/soft-serve; View open source insights on deps.dev
Purl: pkg:golang/github.com/charmbracelet/soft-serve

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.7.5