CVE-2017-9788: Uninitialized memory reflection in mod_auth_digest Severity: Important Vendor: The Apache Software Foundation Versions Affected: all versions through 2.2.33 and 2.4.26 Description: 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 Mitigation: All users of httpd should upgrade to 2.4.27 (or minimally 2.2.34, which will receive no further security releases.) Alternately, the administrator could configure httpd to reject requests with a header matching a complex regular expression identifing where = character does not occur in the first key=value pair, as in the following syntax; [Proxy-]Authorization: Digest key[,key=value] Credit: The Apache HTTP Server security team would like to thank Robert Święcki for reporting this issue. References: https://httpd.apache.org/security_report.html
