ubuntu-cve-2020-13645
Vulnerability from osv_ubuntu
Published
2020-05-28 12:15
Modified
2025-09-08 16:46
Summary
Details

In GNOME glib-networking through 2.64.2, the implementation of GTlsClientConnection skips hostname verification of the server's TLS certificate if the application fails to specify the expected server identity. This is in contrast to its intended documented behavior, to fail the certificate verification. Applications that fail to provide the server identity, including Balsa before 2.5.11 and 2.6.x before 2.6.1, accept a TLS certificate if the certificate is valid for any host.

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "glib-networking",
            "binary_version": "2.48.2-1~ubuntu16.04.2"
          },
          {
            "binary_name": "glib-networking-common",
            "binary_version": "2.48.2-1~ubuntu16.04.2"
          },
          {
            "binary_name": "glib-networking-services",
            "binary_version": "2.48.2-1~ubuntu16.04.2"
          },
          {
            "binary_name": "glib-networking-tests",
            "binary_version": "2.48.2-1~ubuntu16.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "glib-networking",
        "purl": "pkg:deb/ubuntu/glib-networking@2.48.2-1~ubuntu16.04.2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.48.2-1~ubuntu16.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.46.0-1",
        "2.46.1-1",
        "2.46.1-1build1",
        "2.48.0-1",
        "2.48.2-1~ubuntu16.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "glib-networking",
            "binary_version": "2.56.0-1ubuntu0.1"
          },
          {
            "binary_name": "glib-networking-common",
            "binary_version": "2.56.0-1ubuntu0.1"
          },
          {
            "binary_name": "glib-networking-services",
            "binary_version": "2.56.0-1ubuntu0.1"
          },
          {
            "binary_name": "glib-networking-tests",
            "binary_version": "2.56.0-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "glib-networking",
        "purl": "pkg:deb/ubuntu/glib-networking@2.56.0-1ubuntu0.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.56.0-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.54.0-1",
        "2.54.1-1",
        "2.54.1-2",
        "2.55.90-1",
        "2.56.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "balsa",
            "binary_version": "2.6.0-2ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "balsa",
        "purl": "pkg:deb/ubuntu/balsa@2.6.0-2ubuntu0.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.0-2ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.5.6-2",
        "2.5.6-2build1",
        "2.5.9-1",
        "2.5.9-2",
        "2.5.9-3",
        "2.5.9-4",
        "2.6.0-2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "glib-networking",
            "binary_version": "2.64.2-1ubuntu0.1"
          },
          {
            "binary_name": "glib-networking-common",
            "binary_version": "2.64.2-1ubuntu0.1"
          },
          {
            "binary_name": "glib-networking-services",
            "binary_version": "2.64.2-1ubuntu0.1"
          },
          {
            "binary_name": "glib-networking-tests",
            "binary_version": "2.64.2-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "glib-networking",
        "purl": "pkg:deb/ubuntu/glib-networking@2.64.2-1ubuntu0.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.64.2-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.62.1-1",
        "2.63.2-1",
        "2.63.3-0build1",
        "2.63.90-1ubuntu1",
        "2.63.91-1ubuntu1",
        "2.64.0-1",
        "2.64.1-1",
        "2.64.2-1build1"
      ]
    }
  ],
  "aliases": [],
  "details": "In GNOME glib-networking through 2.64.2, the implementation of GTlsClientConnection skips hostname verification of the server\u0027s TLS certificate if the application fails to specify the expected server identity. This is in contrast to its intended documented behavior, to fail the certificate verification. Applications that fail to provide the server identity, including Balsa before 2.5.11 and 2.6.x before 2.6.1, accept a TLS certificate if the certificate is valid for any host.",
  "id": "UBUNTU-CVE-2020-13645",
  "modified": "2025-09-08T16:46:09Z",
  "published": "2020-05-28T12:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-13645"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4405-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-13645"
    }
  ],
  "related": [
    "USN-4405-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-13645"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.