USN-3833-1 (UBUNTU-CVE-2018-6559)

Vulnerability from osv_ubuntu – Published: 2018-11-30 06:31 – Updated: 2026-02-10 04:41 – Source website
VLAI
Summary
linux-aws vulnerabilities
Details

Jann Horn discovered that the Linux kernel mishandles mapping UID or GID ranges inside nested user namespaces in some situations. A local attacker could use this to bypass access controls on resources outside the namespace. (CVE-2018-18955)

Philipp Wendler discovered that the overlayfs implementation in the Linux kernel did not properly verify the directory contents permissions from within a unprivileged user namespace. A local attacker could use this to expose sensitive information (protected file names). (CVE-2018-6559)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2018-6559",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2018-18955",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "linux-aws-cloud-tools-4.15.0-1029",
            "binary_version": "4.15.0-1029.30"
          },
          {
            "binary_name": "linux-aws-headers-4.15.0-1029",
            "binary_version": "4.15.0-1029.30"
          },
          {
            "binary_name": "linux-aws-tools-4.15.0-1029",
            "binary_version": "4.15.0-1029.30"
          },
          {
            "binary_name": "linux-cloud-tools-4.15.0-1029-aws",
            "binary_version": "4.15.0-1029.30"
          },
          {
            "binary_name": "linux-headers-4.15.0-1029-aws",
            "binary_version": "4.15.0-1029.30"
          },
          {
            "binary_name": "linux-image-4.15.0-1029-aws",
            "binary_version": "4.15.0-1029.30"
          },
          {
            "binary_name": "linux-modules-4.15.0-1029-aws",
            "binary_version": "4.15.0-1029.30"
          },
          {
            "binary_name": "linux-tools-4.15.0-1029-aws",
            "binary_version": "4.15.0-1029.30"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "linux-aws",
        "purl": "pkg:deb/ubuntu/linux-aws@4.15.0-1029.30?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.15.0-1029.30"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.15.0-1001.1",
        "4.15.0-1003.3",
        "4.15.0-1005.5",
        "4.15.0-1006.6",
        "4.15.0-1007.7",
        "4.15.0-1009.9",
        "4.15.0-1010.10",
        "4.15.0-1011.11",
        "4.15.0-1016.16",
        "4.15.0-1017.17",
        "4.15.0-1019.19",
        "4.15.0-1020.20",
        "4.15.0-1021.21",
        "4.15.0-1023.23",
        "4.15.0-1025.25",
        "4.15.0-1027.27"
      ]
    }
  ],
  "aliases": [],
  "details": "Jann Horn discovered that the Linux kernel mishandles mapping UID or GID\nranges inside nested user namespaces in some situations. A local attacker\ncould use this to bypass access controls on resources outside the\nnamespace. (CVE-2018-18955)\n\nPhilipp Wendler discovered that the overlayfs implementation in the Linux\nkernel did not properly verify the directory contents permissions from\nwithin a unprivileged user namespace. A local attacker could use this to\nexpose sensitive information (protected file names). (CVE-2018-6559)\n",
  "id": "USN-3833-1",
  "modified": "2026-02-10T04:41:27Z",
  "published": "2018-11-30T06:31:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3833-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2018-6559"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2018-18955"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux-aws vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2018-6559",
    "UBUNTU-CVE-2018-18955"
  ]
}



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