{
  "document": {
    "aggregate_severity": {
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      },
      {
        "category": "details",
        "text": "CVE-2021-3445: fix signature verification bypass via signature placed\n  in the main RPM header",
        "title": "Details"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://cve.tuxcare.com/els/releases/CLSA-2026:1779434064",
        "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1779434064"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/rhel7els/advisories/2026/clsa-2026_1779434064.json"
      }
    ],
    "tracking": {
      "current_release_date": "2026-05-22T07:14:56Z",
      "generator": {
        "date": "2026-05-22T07:14:56Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CLSA-2026:1779434064",
      "initial_release_date": "2026-05-22T07:14:56Z",
      "revision_history": [
        {
          "date": "2026-05-22T07:14:56Z",
          "number": "1",
          "summary": "Initial version"
        }
      ],
      "status": "final",
      "version": "1"
    },
    "title": "libdnf: Fix of CVE-2021-3445"
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Enterprise Linux 7",
                "product": {
                  "name": "Red Hat Enterprise Linux 7",
                  "product_id": "Red-Hat-7",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:o:redhat:enterprise_linux:7:*:*:*:*:*:*:*"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Enterprise Linux"
          }
        ],
        "category": "vendor",
        "name": "Red Hat, Inc."
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "libdnf-devel-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
                "product": {
                  "name": "libdnf-devel-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
                  "product_id": "libdnf-devel-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/tuxcare/libdnf-devel@0.22.5-2.el7_9.tuxcare.els1?arch=x86_64"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "python2-hawkey-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
                "product": {
                  "name": "python2-hawkey-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
                  "product_id": "python2-hawkey-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/tuxcare/python2-hawkey@0.22.5-2.el7_9.tuxcare.els1?arch=x86_64"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
                "product": {
                  "name": "libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
                  "product_id": "libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/tuxcare/libdnf@0.22.5-2.el7_9.tuxcare.els1?arch=x86_64"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "python2-libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
                "product": {
                  "name": "python2-libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
                  "product_id": "python2-libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/tuxcare/python2-libdnf@0.22.5-2.el7_9.tuxcare.els1?arch=x86_64"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          }
        ],
        "category": "vendor",
        "name": "TuxCare"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libdnf-devel-0:0.22.5-2.el7_9.tuxcare.els1.x86_64 as a component of Red Hat Enterprise Linux 7",
          "product_id": "Red-Hat-7:libdnf-devel-0:0.22.5-2.el7_9.tuxcare.els1.x86_64"
        },
        "product_reference": "libdnf-devel-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
        "relates_to_product_reference": "Red-Hat-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "python2-hawkey-0:0.22.5-2.el7_9.tuxcare.els1.x86_64 as a component of Red Hat Enterprise Linux 7",
          "product_id": "Red-Hat-7:python2-hawkey-0:0.22.5-2.el7_9.tuxcare.els1.x86_64"
        },
        "product_reference": "python2-hawkey-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
        "relates_to_product_reference": "Red-Hat-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64 as a component of Red Hat Enterprise Linux 7",
          "product_id": "Red-Hat-7:libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64"
        },
        "product_reference": "libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
        "relates_to_product_reference": "Red-Hat-7"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "python2-libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64 as a component of Red Hat Enterprise Linux 7",
          "product_id": "Red-Hat-7:python2-libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64"
        },
        "product_reference": "python2-libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
        "relates_to_product_reference": "Red-Hat-7"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-3445",
      "cwe": {
        "id": "CWE-347",
        "name": "Improper Verification of Cryptographic Signature"
      },
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in libdnf's signature verification functionality in versions before 0.60.1. This flaw allows an attacker to achieve code execution if they can alter the header information of an RPM package and then trick a user or system into installing it. The highest risk of this vulnerability is to confidentiality, integrity, as well as system availability.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "Red-Hat-7:libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
          "Red-Hat-7:libdnf-devel-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
          "Red-Hat-7:python2-hawkey-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
          "Red-Hat-7:python2-libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2021-3445"
        },
        {
          "category": "external",
          "summary": "https://bugzilla.redhat.com/show_bug.cgi?id=1932079",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1932079"
        },
        {
          "category": "external",
          "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DPMFGGQ5T6WVFTFX3OKMVTTM5O4EXWZR/",
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DPMFGGQ5T6WVFTFX3OKMVTTM5O4EXWZR/"
        },
        {
          "category": "external",
          "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G4NL7TNWAHJ6JVRABQUPWHKKCTHUZMNF/",
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G4NL7TNWAHJ6JVRABQUPWHKKCTHUZMNF/"
        }
      ],
      "release_date": "2021-05-19T14:15:00Z",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-05-22T07:14:26.652865Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1779434064",
          "product_ids": [
            "Red-Hat-7:libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
            "Red-Hat-7:libdnf-devel-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
            "Red-Hat-7:python2-hawkey-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
            "Red-Hat-7:python2-libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64"
          ],
          "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1779434064"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "HIGH",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:P",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "Red-Hat-7:libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
            "Red-Hat-7:libdnf-devel-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
            "Red-Hat-7:python2-hawkey-0:0.22.5-2.el7_9.tuxcare.els1.x86_64",
            "Red-Hat-7:python2-libdnf-0:0.22.5-2.el7_9.tuxcare.els1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ]
    }
  ]
}