usn-4754-4
Vulnerability from osv_ubuntu
Published
2021-03-03 11:38
Modified
2026-04-22 07:36
Summary
python2.7 vulnerability
Details

USN-4754-1 fixed vulnerabilities in Python. Because of a regression, a subsequent update removed the fix for CVE-2021-3177. This update reinstates the security fix for CVE-2021-3177.

We apologize for the inconvenience.

Original advisory details:

It was discovered that Python incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code or cause a denial of service. (CVE-2020-27619, CVE-2021-3177)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-3177",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "idle-python2.7",
            "binary_version": "2.7.12-1ubuntu0~16.04.18"
          },
          {
            "binary_name": "libpython2.7",
            "binary_version": "2.7.12-1ubuntu0~16.04.18"
          },
          {
            "binary_name": "libpython2.7-minimal",
            "binary_version": "2.7.12-1ubuntu0~16.04.18"
          },
          {
            "binary_name": "libpython2.7-stdlib",
            "binary_version": "2.7.12-1ubuntu0~16.04.18"
          },
          {
            "binary_name": "libpython2.7-testsuite",
            "binary_version": "2.7.12-1ubuntu0~16.04.18"
          },
          {
            "binary_name": "python2.7",
            "binary_version": "2.7.12-1ubuntu0~16.04.18"
          },
          {
            "binary_name": "python2.7-examples",
            "binary_version": "2.7.12-1ubuntu0~16.04.18"
          },
          {
            "binary_name": "python2.7-minimal",
            "binary_version": "2.7.12-1ubuntu0~16.04.18"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "python2.7",
        "purl": "pkg:deb/ubuntu/python2.7@2.7.12-1ubuntu0~16.04.18?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.7.12-1ubuntu0~16.04.18"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.7.10-4ubuntu1",
        "2.7.10-4ubuntu2",
        "2.7.11-2",
        "2.7.11-3",
        "2.7.11-4",
        "2.7.11-6",
        "2.7.11-7",
        "2.7.11-7ubuntu1",
        "2.7.12-1~16.04",
        "2.7.12-1ubuntu0~16.04.1",
        "2.7.12-1ubuntu0~16.04.2",
        "2.7.12-1ubuntu0~16.04.3",
        "2.7.12-1ubuntu0~16.04.4",
        "2.7.12-1ubuntu0~16.04.8",
        "2.7.12-1ubuntu0~16.04.9",
        "2.7.12-1ubuntu0~16.04.11",
        "2.7.12-1ubuntu0~16.04.12",
        "2.7.12-1ubuntu0~16.04.13",
        "2.7.12-1ubuntu0~16.04.14",
        "2.7.12-1ubuntu0~16.04.16"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-3177",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/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": "idle-python2.7",
            "binary_version": "2.7.17-1~18.04ubuntu1.6"
          },
          {
            "binary_name": "libpython2.7",
            "binary_version": "2.7.17-1~18.04ubuntu1.6"
          },
          {
            "binary_name": "libpython2.7-minimal",
            "binary_version": "2.7.17-1~18.04ubuntu1.6"
          },
          {
            "binary_name": "libpython2.7-stdlib",
            "binary_version": "2.7.17-1~18.04ubuntu1.6"
          },
          {
            "binary_name": "libpython2.7-testsuite",
            "binary_version": "2.7.17-1~18.04ubuntu1.6"
          },
          {
            "binary_name": "python2.7",
            "binary_version": "2.7.17-1~18.04ubuntu1.6"
          },
          {
            "binary_name": "python2.7-examples",
            "binary_version": "2.7.17-1~18.04ubuntu1.6"
          },
          {
            "binary_name": "python2.7-minimal",
            "binary_version": "2.7.17-1~18.04ubuntu1.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "python2.7",
        "purl": "pkg:deb/ubuntu/python2.7@2.7.17-1~18.04ubuntu1.6?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.7.17-1~18.04ubuntu1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.7.14-2ubuntu2",
        "2.7.14-4",
        "2.7.14-6",
        "2.7.14-7",
        "2.7.14-8",
        "2.7.15~rc1-1",
        "2.7.15~rc1-1ubuntu0.1",
        "2.7.15-4ubuntu4~18.04",
        "2.7.15-4ubuntu4~18.04.1",
        "2.7.15-4ubuntu4~18.04.2",
        "2.7.17-1~18.04",
        "2.7.17-1~18.04ubuntu1",
        "2.7.17-1~18.04ubuntu1.1",
        "2.7.17-1~18.04ubuntu1.2",
        "2.7.17-1~18.04ubuntu1.3",
        "2.7.17-1~18.04ubuntu1.5"
      ]
    }
  ],
  "aliases": [],
  "details": "USN-4754-1 fixed vulnerabilities in Python. Because of a regression, a\nsubsequent update removed the fix for CVE-2021-3177. This update reinstates\nthe security fix for CVE-2021-3177.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that Python incorrectly handled certain inputs.\n An attacker could possibly use this issue to execute arbitrary code\n or cause a denial of service. (CVE-2020-27619, CVE-2021-3177)\n",
  "id": "USN-4754-4",
  "modified": "2026-04-22T07:36:59Z",
  "published": "2021-03-03T11:38:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4754-4"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3177"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "python2.7 vulnerability",
  "upstream": [
    "UBUNTU-CVE-2021-3177"
  ]
}



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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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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