{
  "schema_version": "1.4.0",
  "id": "GHSA-v5w6-wcm8-jm4q",
  "modified": "2025-02-13T18:36:45Z",
  "published": "2023-02-08T22:22:58Z",
  "aliases": [
    "CVE-2022-4450"
  ],
  "summary": "openssl-src contains Double free after calling `PEM_read_bio_ex`",
  "details": "The function `PEM_read_bio_ex()` reads a PEM file from a BIO and parses and decodes the \"name\" (e.g. \"CERTIFICATE\"), any header data and the payload data. If the function succeeds then the \"name_out\", \"header\" and \"data\" arguments are populated with pointers to buffers containing the relevant decoded data. The caller is responsible for freeing those buffers. It is possible to construct a PEM file that results in 0 bytes of payload data. In this case `PEM_read_bio_ex()` will return a failure code but will populate the header argument with a pointer to a buffer that has already been freed. If the caller also frees this buffer then a double free will occur. This will most likely lead to a crash. This could be exploited by an attacker who has the ability to supply malicious PEM files for parsing to achieve a denial of service attack.\n\nThe functions `PEM_read_bio()` and `PEM_read()` are simple wrappers around `PEM_read_bio_ex()` and therefore these functions are also directly affected.\n\nThese functions are also called indirectly by a number of other OpenSSL functions including `PEM_X509_INFO_read_bio_ex()` and\n`SSL_CTX_use_serverinfo_file()` which are also vulnerable. Some OpenSSL internal uses of these functions are not vulnerable because the caller does not free the header argument if `PEM_read_bio_ex()` returns a failure code. These locations include the `PEM_read_bio_TYPE()` functions as well as the decoders introduced in OpenSSL 3.0.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "openssl-src"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "111.25.0"
            }
          ]
        }
      ]
    },
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "openssl-src"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "300.0.0"
            },
            {
              "fixed": "300.0.12"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-4450"
    },
    {
      "type": "WEB",
      "url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=63bcf189be73a9cc1264059bed6f57974be74a83"
    },
    {
      "type": "WEB",
      "url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=bbcf509bd046b34cca19c766bbddc31683d0858b"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2023-0010.html"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202402-08"
    },
    {
      "type": "WEB",
      "url": "https://www.openssl.org/news/secadv/20230207.txt"
    }
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-415"
    ],
    "severity": "HIGH",
    "github_reviewed": true,
    "github_reviewed_at": "2023-02-08T22:22:58Z",
    "nvd_published_at": "2023-02-08T20:15:00Z"
  }
}