{
  "cveId": "CVE-2021-3139",
  "url": "https://patchblox.com/security/cve/CVE-2021-3139",
  "summary": "CVE-2021-3139 is fixed in 2 products on 1 platform, first by libtcmu2 1.5.2-5ubuntu0.20.04.1, released January 13, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "libtcmu2: In Open-iSCSI tcmu-runner 1.3.x, 1.4.x, and 1.5.x through 1.5.2, xcopy_locate_udev in tcmur_cmd_handler.c lacks a che...",
  "description": "In Open-iSCSI tcmu-runner 1.3.x, 1.4.x, and 1.5.x through 1.5.2, xcopy_locate_udev in tcmur_cmd_handler.c lacks a check for transport-layer restrictions, allowing remote attackers to read or write files via directory traversal in an XCOPY request. For example, an attack can occur over a network if the attacker has access to one iSCSI LUN. NOTE: relative to CVE-2020-28374, this is a similar mistake in a different algorithm.",
  "published": "2021-01-13T08:15:00Z",
  "severity": "Medium",
  "epss": 0.02681,
  "epssPercentile": 0.85919,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libtcmu2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.5.2-5ubuntu0.20.04.1",
      "fix": "libtcmu2 1.5.2-5ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libtcmu2-1.5.2-5ubuntu0.20.04.1",
      "released": "2021-01-13T08:15:00Z"
    },
    {
      "platform": "linux",
      "product": "tcmu-runner",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.5.2-5ubuntu0.20.04.1",
      "fix": "tcmu-runner 1.5.2-5ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-tcmu-runner-1.5.2-5ubuntu0.20.04.1",
      "released": "2021-01-13T08:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}