Security advisory

{
  "id": "d72d6522ab0c074bbb5615af09ee202d38c0bf72c049a51a182a4833619494db",
  "url": "https://osv.dev/vulnerability/CVE-2020-8517",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-8517",
    "summary": "An issue was discovered in Squid before 4.10. Due to incorrect input validation, the NTLM authentication credentials parser in ext_lm_group_acl may write to memory outside the credentials buffer. On systems with memory access protections, this can result in the helper process being terminated unexpectedly. This leads to the Squid process also terminating and a denial of service for all clients using the proxy.",
    "evidence": "osv:CVE-2020-8517",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-8517",
      "aliases": [
        "CVE-2020-8517"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/squid-cache/squid",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "91d32285db62332648d92eabd48c5d8e59b475d2"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.10"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "SQUID_4_9",
            "SQUID_4_8",
            "SQUID_4_7",
            "SQUID_4_6",
            "SQUID_4_5",
            "SQUID_4_4",
            "SQUID_4_3",
            "SQUID_4_2",
            "SQUID_4_1",
            "SQUID_4_0_25",
            "SQUID_4_0_24",
            "SQUID_4_0_23",
            "SQUID_4_0_22",
            "SQUID_4_0_21",
            "SQUID_4_0_20",
            "SQUID_4_0_19",
            "SQUID_4_0_18",
            "SQUID_4_0_17",
            "SQUID_4_0_16",
            "SQUID_4_0_15",
            "SQUID_4_0_14",
            "SQUID_4_0_13",
            "SQUID_4_0_12",
            "SQUID_4_0_11",
            "SQUID_4_0_10",
            "SQUID_4_0_9",
            "SQUID_4_0_8",
            "SQUID_4_0_7",
            "SQUID_4_0_6",
            "SQUID_4_0_5",
            "SQUID_4_0_4",
            "SQUID_4_0_3",
            "SQUID_4_0_2",
            "SQUID_4_0_1",
            "take00",
            "SQUID_3_0_RC1",
            "SQUID_3_0_PRE7",
            "SQUID_3_0_PRE6",
            "SQUID_3_0_PRE5",
            "SQUID_3_0_PRE4",
            "SQUID_3_0_PRE3",
            "SQUID_3_0_PRE2",
            "SQUID_3_0_PRE1",
            "HISTORIC_RELEASES"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8517.json"
          }
        }
      ],
      "modified": "2026-10-24T10:31:00.627908529Z",
      "provider": "osv",
      "references": [
        "https://security.gentoo.org/glsa/202003-34",
        "https://security.netapp.com/advisory/ntap-20210304-0002/",
        "https://usn.ubuntu.com/4289-1/"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*"
            ],
            "vendor_product": "canonical:ubuntu_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "16.04"
                  },
                  {
                    "last_affected": "16.04"
                  },
                  {
                    "introduced": "18.04"
                  },
                  {
                    "last_affected": "18.04"
                  },
                  {
                    "introduced": "19.10"
                  },
                  {
                    "last_affected": "19.10"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*"
            ],
            "vendor_product": "opensuse:leap",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "15.1"
                  },
                  {
                    "last_affected": "15.1"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-8517",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 439597,
  "published_at": "2020-02-04T20:15:14.857+00:00"
}