We have discovered security vulnerabilities which affect both RT 4.0.xand RT 4.2.x. We are releasing RT versions 4.0.23 and 4.2.10 to resolve these vulnerabilities, as well as patches which apply atop all released versions of 4.0 and 4.2.
The vulnerabilities addressed by 4.0.23, 4.2.10, and the below patches include the following:
RT 3.0.0 and above, if running on Perl 5.14.0 or higher, are vulnerable to a remote denial-of-service via the email gateway; any installation which accepts mail from untrusted sources is vulnerable, regardless of the permissions configuration inside RT. This denial-of-service may encompass both CPU and disk usage, depending on RT's logging configuration. This vulnerability is assigned CVE-2014-9472.
RT 3.8.8 and above are vulnerable to an information disclosure attack which may reveal RSS feeds URLs, and thus ticket data; this vulnerability is assigned CVE-2015-1165. RSS feed URLs can also be leveraged to perform session hijacking, allowing a user with the URL to log in as the user that created the feed; this vulnerability is assigned CVE-2015-1464.
We would like to thank Christian Loos
Patches for all releases of 4.0.x and 4.2.x are available (signature). Versions of RT older than 4.0.0 are unsupported and do not receive security patches; please contact firstname.lastname@example.org if you need assistance with an older RT version.
The README in the tarball contains instructions for applying the patches. If you need help resolving this issue locally, we will provide discounted pricing for single-incident support; please contact us at email@example.com for more information.