Описание
An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. A dereference of a NULL pointer may occur. This pointer is returned by the OpenSSL sk_X509_REVOKED_value() function when encountering an empty CRL installed by a system administrator. The dereference occurs when validating the certificate of a client connecting to the server in a TLS client/server mutual-authentication setup.
Пакеты
| Пакет | Статус | Версия исправления | Релиз | Тип |
|---|---|---|---|---|
| proftpd-dfsg | fixed | 1.3.6b-2 | package | |
| proftpd-dfsg | fixed | 1.3.6-4+deb10u3 | buster | package |
| proftpd-dfsg | fixed | 1.3.5b-4+deb9u3 | stretch | package |
Примечания
https://github.com/proftpd/proftpd/issues/861
https://github.com/proftpd/proftpd/commit/81cc5dce4fc0285629a1b08a07a109af10c208dd (master)
https://github.com/proftpd/proftpd/commit/be8e1687819cb665359bd62b4c896ff4b1a09c3f (1.3.6 branch)
EPSS
Связанные уязвимости
An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. A dereference of a NULL pointer may occur. This pointer is returned by the OpenSSL sk_X509_REVOKED_value() function when encountering an empty CRL installed by a system administrator. The dereference occurs when validating the certificate of a client connecting to the server in a TLS client/server mutual-authentication setup.
An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. A dereference of a NULL pointer may occur. This pointer is returned by the OpenSSL sk_X509_REVOKED_value() function when encountering an empty CRL installed by a system administrator. The dereference occurs when validating the certificate of a client connecting to the server in a TLS client/server mutual-authentication setup.
An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. A dereference of a NULL pointer may occur. This pointer is returned by the OpenSSL sk_X509_REVOKED_value() function when encountering an empty CRL installed by a system administrator. The dereference occurs when validating the certificate of a client connecting to the server in a TLS client/server mutual-authentication setup.
Уязвимость FTP-сервера ProFTPD, связанная с разыменованием нулевого указателя, позволяющая нарушителю вызвать отказ в обслуживании
EPSS