This update for apache2 fixes the following issues:
mod_dav allows an attacker with permission to create WebDAV locks to crash
server child processes (bsc#1284044).mod_heartmonitor over unicast listener (bsc#1284045).SessionCookieRemove changes across internal redirects
(bsc#1284046).mod_auth_digest allows an unauthenticated remote client to cause a
DoS via forged Authorization headers when Digest authentication is enabled with AuthDigestNcCheck (bsc#1284047).mod_charset_lite (bsc#1284048).mod_rewrite when using lookahead (%{LA-U:HTTP:...}) (bsc#1284049).mod_http2 via shared session->bbtmp re-entrancy (bsc#1284050).mod_dav_fs allows a remote client to read
WebDAV dead properties of resources it cannot author via a GET request for the .DAV state directory (bsc#1284051).mod_ssl when using SSLRequire and file-related expressions
(bsc#1284059).mod_proxy_ftp allows an untrusted FTP server to
cause a proxy to open a data connection to an arbitrary third-party host (bsc#1284060).mod_vhost_alias allows a remote client to cause a DoS or potentially
execute arbitrary code via an HTTP request with a specially crafted Host header (bsc#1284061).mod_xml2enc allows an untrusted backend server to cause a denial of
service via a crafted proxied response (bsc#1284058).mod_proxy_uwsgi allows for response smuggling via a
crafted uwsgi response with Transfer-Encoding (bsc#1284057).mod_auth_digest allows a MiTM attacker to replay captured
digest authentication credentials via crafted requests (bsc#1284056).mod_auth_digest allows an unauthenticated remote client to cause authentication
state corruption via concurrent Digest authentication requests (bsc#1284055).mod_userdir module when configured with absolute non-wildcard
UserDir directive (bsc#1284054).mod_dav_fs allows an authenticated WebDAV client with write access to crash
worker processes and persistently corrupt a directory's property database (bsc#1284053).