Multiple vulnerabilities has been found and corrected in subversion:

The walk function in repos.c in the mod_dav_svn module for the Apache
HTTP Server, as distributed in Apache Subversion before 1.6.15,
allows remote authenticated users to cause a denial of service (NULL
pointer dereference and daemon crash) via vectors that trigger the
walking of SVNParentPath collections (CVE-2010-4539).

Multiple memory leaks in rev_hunt.c in Apache Subversion before 1.6.15
allow remote authenticated users to cause a denial of service (memory
consumption and daemon crash) via the -g option to the blame command
(CVE-2010-4644).

Packages for 2009.0 are provided as of the Extended Maintenance
Program. Please visit this link to learn more:
http://store.mandriva.com/product_info.php?cPath=149&products_id=490

The updated packages have been upgraded to the latest versions (1.5.9,
1.6.15) which is not affected by these issues and in turn contains
many bugfixes as well.