rustsec-2021-0058
Vulnerability from osv_rustsec
Published
2021-05-01 12:00
Modified
2023-06-13 13:10
Summary
Null pointer deref in `X509_issuer_and_serial_hash()`
Details

The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack.

The function X509_issuer_and_serial_hash() is never directly called by OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on certificates that may have been obtained from untrusted sources.

To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "denial-of-service"
        ],
        "cvss": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "openssl-src",
        "purl": "pkg:cargo/openssl-src"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "111.14.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2021-23841",
    "GHSA-84rm-qf37-fgc2"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "The OpenSSL public API function `X509_issuer_and_serial_hash()` attempts to\ncreate a unique hash value based on the issuer and serial number data contained\nwithin an X509 certificate. However it fails to correctly handle any errors\nthat may occur while parsing the issuer field (which might occur if the issuer\nfield is maliciously constructed). This may subsequently result in a NULL\npointer deref and a crash leading to a potential denial of service attack.\n\nThe function `X509_issuer_and_serial_hash()` is never directly called by OpenSSL\nitself so applications are only vulnerable if they use this function directly\nand they use it on certificates that may have been obtained from untrusted\nsources.",
  "id": "RUSTSEC-2021-0058",
  "modified": "2023-06-13T13:10:24Z",
  "published": "2021-05-01T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/openssl-src"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2021-0058.html"
    },
    {
      "type": "WEB",
      "url": "https://www.openssl.org/news/secadv/20210216.txt"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Null pointer deref in `X509_issuer_and_serial_hash()`"
}


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