CVE-2022-4450: Openssl src Openssl-src Contains Double Free After Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-v5w6-wcm8-jm4q",
  "modified" : "2025-11-04T22:08:19Z",
  "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://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0003"
  }, {
    "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"
  }
}