CVE-2017-9788
CriticalSummary
In Apache httpd before 2.2.34 and 2.4.x before 2.4.27, the value placeholder in [Proxy-]Authorization headers of type 'Digest' was not initialized or reset before or between successive key=value assignments by mod_auth_digest. This could lead to leakage of potentially confidential information and a segfault in other cases resulting in denial of service.
Risk Assessment
Organizations may be exposed to leakage of confidential data and denial of service attacks, potentially leading to service outages.
Recommendation
It is recommended to upgrade Apache httpd to version 2.2.34 or 2.4.27 and later to mitigate this vulnerability.
Original NVD description (English source)
In Apache httpd before 2.2.34 and 2.4.x before 2.4.27, the value placeholder in [Proxy-]Authorization headers of type 'Digest' was not initialized or reset before or between successive key=value assignments by mod_auth_digest. Providing an initial key with no '=' assignment could reflect the stale value of uninitialized pool memory used by the prior request, leading to leakage of potentially confidential information, and a segfault in other cases resulting in denial of service.