The ssl.match_hostname function in CPython (aka Python) before 2.7.9 and 3.x before 3.3.3 does not properly handle wildcards in hostnames, which might allow man-in-the-middle attackers to spoof servers via a crafted certificate.
| Product | Vendor | Version |
|---|---|---|
| n/a | n/a | 17.3.3 |
| n/a | n/a | 5.1.0 |