ubuntu-cve-2020-6750
Vulnerability from osv_ubuntu
Published
2020-01-09 20:15
Modified
2025-07-16 04:55
Summary
Details

GSocketClient in GNOME GLib through 2.62.4 may occasionally connect directly to a target address instead of connecting via a proxy server when configured to do so, because the proxy_addr field is mishandled. This bug is timing-dependent and may occur only sporadically depending on network delays. The greatest security relevance is in use cases where a proxy is used to help with privacy/anonymity, even though there is no technical barrier to a direct connection. NOTE: versions before 2.60 are unaffected.

Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
N/A (UNKNOWN)
low
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libglib2.0-0",
            "binary_version": "2.48.2-0ubuntu4.4"
          },
          {
            "binary_name": "libglib2.0-0-dbg",
            "binary_version": "2.48.2-0ubuntu4.4"
          },
          {
            "binary_name": "libglib2.0-0-dbgsym",
            "binary_version": "2.48.2-0ubuntu4.4"
          },
          {
            "binary_name": "libglib2.0-0-refdbg",
            "binary_version": "2.48.2-0ubuntu4.4"
          },
          {
            "binary_name": "libglib2.0-0-refdbg-dbgsym",
            "binary_version": "2.48.2-0ubuntu4.4"
          },
          {
            "binary_name": "libglib2.0-bin",
            "binary_version": "2.48.2-0ubuntu4.4"
          },
          {
            "binary_name": "libglib2.0-bin-dbgsym",
            "binary_version": "2.48.2-0ubuntu4.4"
          },
          {
            "binary_name": "libglib2.0-data",
            "binary_version": "2.48.2-0ubuntu4.4"
          },
          {
            "binary_name": "libglib2.0-dev",
            "binary_version": "2.48.2-0ubuntu4.4"
          },
          {
            "binary_name": "libglib2.0-dev-dbgsym",
            "binary_version": "2.48.2-0ubuntu4.4"
          },
          {
            "binary_name": "libglib2.0-doc",
            "binary_version": "2.48.2-0ubuntu4.4"
          },
          {
            "binary_name": "libglib2.0-tests",
            "binary_version": "2.48.2-0ubuntu4.4"
          },
          {
            "binary_name": "libglib2.0-tests-dbgsym",
            "binary_version": "2.48.2-0ubuntu4.4"
          },
          {
            "binary_name": "libglib2.0-udeb",
            "binary_version": "2.48.2-0ubuntu4.4"
          },
          {
            "binary_name": "libglib2.0-udeb-dbgsym",
            "binary_version": "2.48.2-0ubuntu4.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "glib2.0",
        "purl": "pkg:deb/ubuntu/glib2.0@2.48.2-0ubuntu4.4?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.48.2-0ubuntu4.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.46.1-1",
        "2.46.1-2",
        "2.47.1-1",
        "2.47.3-3",
        "2.47.4-1",
        "2.47.5-1",
        "2.47.6-1",
        "2.48.0-1ubuntu3",
        "2.48.0-1ubuntu4",
        "2.48.1-1~ubuntu16.04.1",
        "2.48.2-0ubuntu1",
        "2.48.2-0ubuntu3",
        "2.48.2-0ubuntu4",
        "2.48.2-0ubuntu4.1",
        "2.48.2-0ubuntu4.2",
        "2.48.2-0ubuntu4.3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libglib2.0-0",
            "binary_version": "2.56.4-0ubuntu0.18.04.4"
          },
          {
            "binary_name": "libglib2.0-0-dbgsym",
            "binary_version": "2.56.4-0ubuntu0.18.04.4"
          },
          {
            "binary_name": "libglib2.0-bin",
            "binary_version": "2.56.4-0ubuntu0.18.04.4"
          },
          {
            "binary_name": "libglib2.0-bin-dbgsym",
            "binary_version": "2.56.4-0ubuntu0.18.04.4"
          },
          {
            "binary_name": "libglib2.0-data",
            "binary_version": "2.56.4-0ubuntu0.18.04.4"
          },
          {
            "binary_name": "libglib2.0-dev",
            "binary_version": "2.56.4-0ubuntu0.18.04.4"
          },
          {
            "binary_name": "libglib2.0-dev-bin",
            "binary_version": "2.56.4-0ubuntu0.18.04.4"
          },
          {
            "binary_name": "libglib2.0-dev-bin-dbgsym",
            "binary_version": "2.56.4-0ubuntu0.18.04.4"
          },
          {
            "binary_name": "libglib2.0-doc",
            "binary_version": "2.56.4-0ubuntu0.18.04.4"
          },
          {
            "binary_name": "libglib2.0-tests",
            "binary_version": "2.56.4-0ubuntu0.18.04.4"
          },
          {
            "binary_name": "libglib2.0-tests-dbgsym",
            "binary_version": "2.56.4-0ubuntu0.18.04.4"
          },
          {
            "binary_name": "libglib2.0-udeb",
            "binary_version": "2.56.4-0ubuntu0.18.04.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "glib2.0",
        "purl": "pkg:deb/ubuntu/glib2.0@2.56.4-0ubuntu0.18.04.4?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.56.4-0ubuntu0.18.04.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.54.1-1ubuntu1",
        "2.55.2-2ubuntu1",
        "2.56.0-2ubuntu1",
        "2.56.0-4ubuntu1",
        "2.56.1-2ubuntu1",
        "2.56.2-0ubuntu0.18.04.1",
        "2.56.2-0ubuntu0.18.04.2",
        "2.56.3-0ubuntu0.18.04.1",
        "2.56.4-0ubuntu0.18.04.2",
        "2.56.4-0ubuntu0.18.04.3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libglib2.0-0",
            "binary_version": "2.64.1-1"
          },
          {
            "binary_name": "libglib2.0-0-dbgsym",
            "binary_version": "2.64.1-1"
          },
          {
            "binary_name": "libglib2.0-bin",
            "binary_version": "2.64.1-1"
          },
          {
            "binary_name": "libglib2.0-bin-dbgsym",
            "binary_version": "2.64.1-1"
          },
          {
            "binary_name": "libglib2.0-data",
            "binary_version": "2.64.1-1"
          },
          {
            "binary_name": "libglib2.0-dev",
            "binary_version": "2.64.1-1"
          },
          {
            "binary_name": "libglib2.0-dev-bin",
            "binary_version": "2.64.1-1"
          },
          {
            "binary_name": "libglib2.0-dev-bin-dbgsym",
            "binary_version": "2.64.1-1"
          },
          {
            "binary_name": "libglib2.0-doc",
            "binary_version": "2.64.1-1"
          },
          {
            "binary_name": "libglib2.0-tests",
            "binary_version": "2.64.1-1"
          },
          {
            "binary_name": "libglib2.0-tests-dbgsym",
            "binary_version": "2.64.1-1"
          },
          {
            "binary_name": "libglib2.0-udeb",
            "binary_version": "2.64.1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "glib2.0",
        "purl": "pkg:deb/ubuntu/glib2.0@2.64.1-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.64.1-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.62.1-1",
        "2.63.1-2",
        "2.63.1-2ubuntu1",
        "2.63.3-1",
        "2.63.3-3",
        "2.63.5-2",
        "2.64.0-1"
      ]
    }
  ],
  "aliases": [],
  "details": "GSocketClient in GNOME GLib through 2.62.4 may occasionally connect directly to a target address instead of connecting via a proxy server when configured to do so, because the proxy_addr field is mishandled. This bug is timing-dependent and may occur only sporadically depending on network delays. The greatest security relevance is in use cases where a proxy is used to help with privacy/anonymity, even though there is no technical barrier to a direct connection. NOTE: versions before 2.60 are unaffected.",
  "id": "UBUNTU-CVE-2020-6750",
  "modified": "2025-07-16T04:55:35Z",
  "published": "2020-01-09T20:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-6750"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-6750"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-6750"
  ],
  "withdrawn": "2025-07-18T16:45:43Z"
}



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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

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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.