The remote host is missing an update to apr-util announced via advisory USN-786-1.

The problem can be corrected by upgrading your system to the following package versions: Ubuntu 8.04 LTS: libaprutil1 1.2.12+dfsg-3ubuntu0.1 Ubuntu 8.10: libaprutil1 1.2.12+dfsg-7ubuntu0.1 Ubuntu 9.04: libaprutil1 1.2.12+dfsg-8ubuntu0.1 After a standard system upgrade you need to restart any services that use apr-util, such as Apache or svnserve, to effect the necessary changes. https://secure1.securityspace.com/smysecure/catid.html?in=USN-786-1

Matthew Palmer discovered an underflow flaw in apr-util. An attacker could cause a denial of service via application crash in Apache using a crafted SVNMasterURI directive, .htaccess file, or when using mod_apreq2. Applications using libapreq2 are also affected. (CVE-2009-0023) It was discovered that the XML parser did not properly handle entity expansion. A remote attacker could cause a denial of service via memory resource consumption by sending a crafted request to an Apache server configured to use mod_dav or mod_dav_svn. (CVE-2009-1955) C. Michael Pilato discovered an off-by-one buffer overflow in apr-util when formatting certain strings. For big-endian machines (powerpc, hppa and sparc in Ubuntu), a remote attacker could cause a denial of service or information disclosure leak. All other architectures for Ubuntu are not considered to be at risk. (CVE-2009-1956)