The X509Extension in pyOpenSSL before 0.13.1 does not properly handle a \0 character in a domain name in the Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.
{
"nvd_published_at": "2013-09-30T21:55:00Z",
"github_reviewed": true,
"cwe_ids": [
"CWE-20"
],
"severity": "HIGH",
"github_reviewed_at": "2024-02-23T20:57:09Z"
}