The (1) mod_dav_svn and (2) svnserve servers in Subversion 1.6.0 through 1.7.19 and 1.8.0 through 1.8.11 allow remote attackers to cause a denial of service (assertion failure and abort) via crafted parameter combinations related to dynamically evaluated revision numbers.
https://support.apple.com/HT205217
https://security.gentoo.org/glsa/201610-05
http://www.ubuntu.com/usn/USN-2721-1
http://www.securitytracker.com/id/1033214
http://www.securityfocus.com/bid/74260
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
http://www.debian.org/security/2015/dsa-3231
http://subversion.apache.org/security/CVE-2015-0248-advisory.txt
http://rhn.redhat.com/errata/RHSA-2015-1742.html
http://rhn.redhat.com/errata/RHSA-2015-1633.html
http://lists.opensuse.org/opensuse-updates/2015-04/msg00008.html
http://lists.apple.com/archives/security-announce/2015/Sep/msg00002.html