USN-7742-1 (UBUNTU-CVE-2025-6395)

Vulnerability from osv_ubuntu – Published: 2025-09-09 13:45 – Updated: 2026-06-25 10:46 – Source website
VLAI
Summary
gnutls28 vulnerabilities
Details

It was discovered that GnuTLS incorrectly handled exporting Subject Alternative Name (SAN) entries containing an otherName. A remote attacker could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2025-32988)

It was discovered that the GnuTLS certtool utility incorrectly handled parsing certain template files. An attacker could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2025-32990)

Stefan Bühler discovered that GnuTLS incorrectly handled parsing certain template files. An attacker could possibly use this issue to cause GnuTLS to crash, resulting in a denial of service. This issue only affected Ubuntu 20.04 LTS. (CVE-2025-6395)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-32990",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "gnutls-bin",
            "binary_version": "3.4.10-4ubuntu1.9+esm2"
          },
          {
            "binary_name": "guile-gnutls",
            "binary_version": "3.4.10-4ubuntu1.9+esm2"
          },
          {
            "binary_name": "libgnutls-openssl27",
            "binary_version": "3.4.10-4ubuntu1.9+esm2"
          },
          {
            "binary_name": "libgnutls30",
            "binary_version": "3.4.10-4ubuntu1.9+esm2"
          },
          {
            "binary_name": "libgnutlsxx28",
            "binary_version": "3.4.10-4ubuntu1.9+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "gnutls28",
        "purl": "pkg:deb/ubuntu/gnutls28@3.4.10-4ubuntu1.9+esm2?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.4.10-4ubuntu1.9+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.3.15-5ubuntu2",
        "3.3.18-1ubuntu1",
        "3.3.20-1ubuntu1",
        "3.4.9-2ubuntu1",
        "3.4.10-4ubuntu1",
        "3.4.10-4ubuntu1.1",
        "3.4.10-4ubuntu1.2",
        "3.4.10-4ubuntu1.3",
        "3.4.10-4ubuntu1.4",
        "3.4.10-4ubuntu1.5",
        "3.4.10-4ubuntu1.6",
        "3.4.10-4ubuntu1.7",
        "3.4.10-4ubuntu1.8",
        "3.4.10-4ubuntu1.9",
        "3.4.10-4ubuntu1.9+esm1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-32988",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-32990",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "gnutls-bin",
            "binary_version": "3.5.18-1ubuntu1.6+esm2"
          },
          {
            "binary_name": "libgnutls-dane0",
            "binary_version": "3.5.18-1ubuntu1.6+esm2"
          },
          {
            "binary_name": "libgnutls-openssl27",
            "binary_version": "3.5.18-1ubuntu1.6+esm2"
          },
          {
            "binary_name": "libgnutls30",
            "binary_version": "3.5.18-1ubuntu1.6+esm2"
          },
          {
            "binary_name": "libgnutlsxx28",
            "binary_version": "3.5.18-1ubuntu1.6+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "gnutls28",
        "purl": "pkg:deb/ubuntu/gnutls28@3.5.18-1ubuntu1.6+esm2?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.5.18-1ubuntu1.6+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.5.8-6ubuntu3",
        "3.5.17-1ubuntu1",
        "3.5.17-1ubuntu3",
        "3.5.18-1ubuntu1",
        "3.5.18-1ubuntu1.1",
        "3.5.18-1ubuntu1.2",
        "3.5.18-1ubuntu1.3",
        "3.5.18-1ubuntu1.4",
        "3.5.18-1ubuntu1.5",
        "3.5.18-1ubuntu1.6",
        "3.5.18-1ubuntu1.6+esm1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-6395",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-32988",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-32990",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "gnutls-bin",
            "binary_version": "3.6.13-2ubuntu1.12+esm1"
          },
          {
            "binary_name": "guile-gnutls",
            "binary_version": "3.6.13-2ubuntu1.12+esm1"
          },
          {
            "binary_name": "libgnutls-dane0",
            "binary_version": "3.6.13-2ubuntu1.12+esm1"
          },
          {
            "binary_name": "libgnutls-openssl27",
            "binary_version": "3.6.13-2ubuntu1.12+esm1"
          },
          {
            "binary_name": "libgnutls30",
            "binary_version": "3.6.13-2ubuntu1.12+esm1"
          },
          {
            "binary_name": "libgnutlsxx28",
            "binary_version": "3.6.13-2ubuntu1.12+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "gnutls28",
        "purl": "pkg:deb/ubuntu/gnutls28@3.6.13-2ubuntu1.12+esm1?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.6.13-2ubuntu1.12+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.6.9-5ubuntu1",
        "3.6.9-5ubuntu2",
        "3.6.10-5",
        "3.6.11.1-2",
        "3.6.11.1-2ubuntu2",
        "3.6.13-2ubuntu1",
        "3.6.13-2ubuntu1.1",
        "3.6.13-2ubuntu1.2",
        "3.6.13-2ubuntu1.3",
        "3.6.13-2ubuntu1.6",
        "3.6.13-2ubuntu1.7",
        "3.6.13-2ubuntu1.8",
        "3.6.13-2ubuntu1.9",
        "3.6.13-2ubuntu1.10",
        "3.6.13-2ubuntu1.11",
        "3.6.13-2ubuntu1.12"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that GnuTLS incorrectly handled exporting Subject\nAlternative Name (SAN) entries containing an otherName. A remote attacker\ncould use this issue to cause GnuTLS to crash, resulting in a denial of\nservice, or possibly execute arbitrary code. This issue only affected\nUbuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2025-32988)\n\nIt was discovered that the GnuTLS certtool utility incorrectly handled\nparsing certain template files. An attacker could use this issue to cause\nGnuTLS to crash, resulting in a denial of service, or possibly execute\narbitrary code. (CVE-2025-32990)\n\nStefan B\u00fchler discovered that GnuTLS incorrectly handled parsing certain\ntemplate files. An attacker could possibly use this issue to cause GnuTLS\nto crash, resulting in a denial of service. This issue only affected\nUbuntu 20.04 LTS. (CVE-2025-6395)",
  "id": "USN-7742-1",
  "modified": "2026-06-25T10:46:56Z",
  "published": "2025-09-09T13:45:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7742-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-6395"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-32988"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-32990"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "gnutls28 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2025-6395",
    "UBUNTU-CVE-2025-32988",
    "UBUNTU-CVE-2025-32990"
  ]
}



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