There is a type confusion vulnerability relating to X.400 address processing
inside an X.509 GeneralName. X.400 addresses were parsed as an ASN1_STRING but
the public structure definition for GENERAL_NAME incorrectly specified the type
of the x400Address field as ASN1_TYPE. This field is subsequently interpreted by
the OpenSSL function GENERAL_NAME_cmp as an ASN1_TYPE rather than an
ASN1_STRING.
When CRL checking is enabled (i.e. the application sets the
X509_V_FLAG_CRL_CHECK flag), this vulnerability may allow an attacker to pass
arbitrary pointers to a memcmp call, enabling them to read memory contents or
enact a denial of service. In most cases, the attack requires the attacker to
provide both the certificate chain and CRL, neither of which need to have a
valid signature. If the attacker only controls one of these inputs, the other
input must already contain an X.400 address as a CRL distribution point, which
is uncommon. As such, this vulnerability is most likely to only affect
applications which have implemented their own functionality for retrieving CRLs
over a network.
{
"sources": [
{
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2023-0286",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2023-0286",
"modified": "2026-06-17T05:25:12.637Z",
"id": "CVE-2023-0286",
"published": "2023-02-08T20:15:24.267Z",
"imported": "2026-07-17T21:25:49.288Z",
"database_specific": {
"status": "Modified"
}
},
{
"html_url": "https://github.com/advisories/GHSA-x4qr-2fvf-3mr5",
"modified": "2025-11-04T22:08:45Z",
"id": "GHSA-x4qr-2fvf-3mr5",
"published": "2023-02-08T22:17:06Z",
"imported": "2026-07-17T21:25:49.457Z",
"url": "https://api.github.com/advisories/GHSA-x4qr-2fvf-3mr5"
},
{
"html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-0817",
"modified": "2025-11-04T19:14:36Z",
"id": "EUVD-2023-0817",
"published": "2023-02-08T19:01:50Z",
"imported": "2026-07-17T21:25:59.965Z",
"url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2023-0817"
}
],
"license": "CC-BY-4.0"
}