An authentication bypass vulnerability exists libcurl <8.0.0 in the connection reuse feature which can reuse previously established connections with incorrect user permissions due to a failure to check for changes in the CURLOPT_GSSAPI_DELEGATION option. This vulnerability affects krb5/kerberos/negotiate/GSSAPI transfers and could potentially result in unauthorized access to sensitive information. The safest option is to not reuse connections if the CURLOPT_GSSAPI_DELEGATION option has been changed.
The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libcurl | Haxx | 7.22.0 (including) | 7.88.1 (including) |
| Red Hat Enterprise Linux 8 | RedHat | curl-0:7.61.1-30.el8_8.3 | * |
| Red Hat Enterprise Linux 8.6 Extended Update Support | RedHat | curl-0:7.61.1-22.el8_6.12 | * |
| Red Hat Enterprise Linux 9 | RedHat | curl-0:7.76.1-26.el9 | * |
| Red Hat Enterprise Linux 9 | RedHat | curl-0:7.76.1-26.el9 | * |
| Curl | Ubuntu | bionic | * |
| Curl | Ubuntu | esm-infra/xenial | * |
| Curl | Ubuntu | focal | * |
| Curl | Ubuntu | jammy | * |
| Curl | Ubuntu | kinetic | * |
| Curl | Ubuntu | lunar | * |
| Curl | Ubuntu | trusty | * |
| Curl | Ubuntu | trusty/esm | * |
| Curl | Ubuntu | upstream | * |
| Curl | Ubuntu | xenial | * |