bugzilla -- multiple vulnerabilities

A Bugzilla Security Advisory reports:

The following security issues have been discovered in
Bugzilla:
LDAP Injection
When the user logs in using LDAP, the username is not
escaped when building the uid=$username filter which is
used to query the LDAP directory. This could potentially
lead to LDAP injection.
Directory Browsing
Extensions are not protected against directory browsing
and users can access the source code of the templates
which may contain sensitive data.
Directory browsing is blocked in Bugzilla 4.3.3 only,
because it requires a configuration change in the Apache
httpd.conf file to allow local .htaccess files to use
Options -Indexes. To not break existing installations,
this fix has not been backported to stable branches.
The access to templates is blocked for all supported
branches except the old 3.6 branch, because this branch
doesn’t have .htaccess in the bzr repository and cannot
be fixed easily for existing installations without
potentially conflicting with custom changes.