Security advisory

{
  "id": "fad6522d3f98ff0f8d0448e0cd4027a298f52a360490fc0957ff16c0ccd82988",
  "url": "https://osv.dev/vulnerability/CVE-2021-35472",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-35472",
    "summary": "An issue was discovered in LemonLDAP::NG before 2.0.12. Session cache corruption can lead to authorization bypass or spoofing. By running a loop that makes many authentication attempts, an attacker might alternately be authenticated as one of two different users.",
    "evidence": "osv:CVE-2021-35472",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-35472",
      "aliases": [
        "CVE-2021-35472"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "01cdeb8f8a689b1bd6548a55b3be2775fa8aad2d"
                },
                {
                  "fixed": "8d3b763b6af2b8a9c4ad2765fbfabffec8a73af5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:lemonldap-ng:lemonldap\\:\\:ng:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.0.11"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "8d3b763b6af2b8a9c4ad2765fbfabffec8a73af5"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.0.2",
            "ubuntu/disco",
            "debian/buster",
            "v2.0.11",
            "ubuntu/hirsute",
            "debian/bullseye",
            "v2.0.10",
            "v2.0.9",
            "v2.0.8",
            "ubuntu/groovy",
            "v2.0.7",
            "ubuntu/focal",
            "v2.0.6",
            "v2.0.4",
            "v2.0.3",
            "v2.0.1",
            "v2.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-35472.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:46.171279566Z",
      "provider": "osv",
      "references": [
        "https://www.debian.org/security/2021/dsa-4943",
        "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/commit/8d3b763b6af2b8a9c4ad2765fbfabffec8a73af5",
        "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/2539",
        "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/tags"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "10.0"
                  },
                  {
                    "last_affected": "10.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-35472",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386122,
  "published_at": "2021-07-30T14:15:17.887+00:00"
}