GHSA-wc79-7x8x-2p58

Source

https://github.com/advisories/GHSA-wc79-7x8x-2p58

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/03/GHSA-wc79-7x8x-2p58/GHSA-wc79-7x8x-2p58.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-wc79-7x8x-2p58

Aliases

Published

2025-03-03T19:56:58Z

Modified

2025-03-04T10:29:41.823087Z

Severity

6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator

Summary

MinIO allows an SFTP authentication bypass due to improperly trusted SSH key

Details

Summary

A bug in evaluating the trust of the SSH key used in an SFTP connection to MinIO allows authentication bypass and unauthorized data access.

Details

On a MinIO server with SFTP access configured and using LDAP as an external identity provider, MinIO supports SSH key based authentication for SFTP connections when the user has the sshPublicKey attribute set in their LDAP server. The server trusts the client's key only when the public key is the same as the sshPublicKey attribute.

Due to the bug, when the user has no sshPublicKey property in LDAP, the server ends up trusting the key allowing the client to perform any FTP operations allowed by the MinIO access policies associated with the LDAP user (or any of their groups).

The bug was introduced in https://github.com/minio/minio/commit/91e1487de45720753c9e9e4c02b1bd16b7e452fa.

Impact

The following requirements must be met to exploit this vulnerability:

MinIO server must be configured to allow SFTP access and use LDAP as an external identity provider.
Knowledge of an LDAP username that does not have the sshPublicKey property set.
Such an LDAP username or one of their groups must also have some MinIO access policy configured.

When this bug is successfully exploited, the attacker can perform any FTP operations (i.e. reading, writing, deleting and listing objects) allowed by the access policy associated with the LDAP user account (and their groups).

Database specific

{
    "nvd_published_at": "2025-02-28T21:15:27Z",
    "cwe_ids": [
        "CWE-287"
    ],
    "severity": "MODERATE",
    "github_reviewed": true,
    "github_reviewed_at": "2025-03-03T19:56:58Z"
}

References

Affected packages

Go / github.com/minio/minio

Package

Name: github.com/minio/minio; View open source insights on deps.dev
Purl: pkg:golang/github.com/minio/minio

Affected ranges

Type: SEMVER
Events: Introduced

0.0.0-20240605075113-91e1487de457

Fixed

0.0.0-20250227184332-4c71f1b4ec0f