ghsa-mpgj-hch9-5rvx
Vulnerability from github
Published
2025-06-19 12:30
Modified
2025-06-23 15:31
Severity ?
7.0 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Details

A Local Privilege Escalation (LPE) vulnerability was found in libblockdev. Generally, the "allow_active" setting in Polkit permits a physically present user to take certain actions based on the session type. Due to the way libblockdev interacts with the udisks daemon, an "allow_active" user on a system may be able escalate to full root privileges on the target host. Normally, udisks mounts user-provided filesystem images with security flags like nosuid and nodev to prevent privilege escalation. However, a local attacker can create a specially crafted XFS image containing a SUID-root shell, then trick udisks into resizing it. This mounts their malicious filesystem with root privileges, allowing them to execute their SUID-root shell and gain complete control of the system.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-6019"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-250"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-19T12:15:19Z",
    "severity": "HIGH"
  },
  "details": "A Local Privilege Escalation (LPE) vulnerability was found in libblockdev. Generally, the \"allow_active\" setting in Polkit permits a physically present user to take certain actions based on the session type. Due to the way libblockdev interacts with the udisks daemon, an \"allow_active\" user on a system may be able escalate to full root privileges on the target host. Normally, udisks mounts user-provided filesystem images with security flags like nosuid and nodev to prevent privilege escalation.  However, a local attacker can create a specially crafted XFS image containing a SUID-root shell, then trick udisks into resizing it. This mounts their malicious filesystem with root privileges, allowing them to execute their SUID-root shell and gain complete control of the system.",
  "id": "GHSA-mpgj-hch9-5rvx",
  "modified": "2025-06-23T15:31:39Z",
  "published": "2025-06-19T12:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-6019"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2025:9320"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2025:9321"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2025:9322"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2025:9323"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2025:9324"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2025:9325"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2025:9326"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2025:9327"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2025:9328"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2025-6019"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2370051"
    },
    {
      "type": "WEB",
      "url": "https://cdn2.qualys.com/2025/06/17/suse15-pam-udisks-lpe.txt"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/06/msg00018.html"
    },
    {
      "type": "WEB",
      "url": "https://news.ycombinator.com/item?id=44325861"
    },
    {
      "type": "WEB",
      "url": "https://www.bleepingcomputer.com/news/linux/new-linux-udisks-flaw-lets-attackers-get-root-on-major-linux-distros"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/06/17/5"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/06/17/6"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/06/18/1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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