Apache 2.4.x < 2.4.27 Multiple Vulnerabilities

According to its banner, the version of Apache running on the remote host is 2.4.x prior to 2.4.27. It is, therefore, affected by the following vulnerabilities :

• A denial of service vulnerability exists in httpd due to a failure to initialize or reset the value placeholder in [Proxy-]Authorization headers of type ‘Digest’ before or between successive key=value assignments by mod_auth_digest. An unauthenticated, remote attacker can exploit this, by providing an initial key with no ‘=’ assignment, to disclose sensitive information or cause a denial of service condition. (CVE-2017-9788)

• A read-after-free error exists in httpd that is triggered when closing a large number of connections. An unauthenticated, remote attacker can exploit this to have an unspecified impact. (CVE-2017-9789)

Note that the scanner has not tested for these issues but has instead relied only on the application’s self-reported version number.