Security vulnerabilities in RT

We discovered a number of security vulnerabilities which affect both RT3.8.x and RT 4.0.x. We released RT versions 3.8.17 and 4.0.13 to resolve these vulnerabilities, as well as patches which apply atop all released versions of 3.8 and 4.0.

The vulnerabilities addressed by 3.8.17, 4.0.13, and the below patches include the following:

RT 4.0.0 and above are vulnerable to a limited privilege escalation leading to unauthorized modification of ticket data. The DeleteTicket right and any custom lifecycle transition rights may be bypassed by any user with ModifyTicket. This vulnerability is assigned CVE-2012-4733.

RT 3.8.0 and above include a version of bin/rt that uses semi-predictable names when creating tempfiles. This could possibly be exploited by a malicious user to overwrite files with permissions of the user running bin/rt. This vulnerability is assigned CVE-2013-3368.

RT 3.8.0 and above allow calling of arbitrary Mason components (without control of arguments) for users who can see administration pages. This could be used by a malicious user to run private components which may have negative side-effects. This vulnerability is assigned CVE-2013-3369.

RT 3.8.0 and above allow direct requests to private callback components. Though no callback components ship with RT, this could be used to exploit an extension or local callback which uses the arguments passed to it insecurely. This vulnerability is assigned CVE-2013-3370.

RT 3.8.3 and above are vulnerable to cross-site scripting (XSS) via attachment filenames. The vector is difficult to exploit due to parsing requirements. Additionally, RT 4.0.0 and above are vulnerable to XSS via maliciously-crafted "URLs" in ticket content when RT's "MakeClicky" feature is configured. Although not believed to be exploitable in the stock configuration, a patch is also included for RTIR 2.6.x to add bulletproofing. These vulnerabilities are assigned CVE-2013-3371.

RT 3.8.0 and above are vulnerable to an HTTP header injection limited to the value of the Content-Disposition header. Injection of other arbitrary response headers is not possible. Some (especially older) browsers may allow multiple Content-Disposition values which could lead to XSS. Newer browsers contain security measures to prevent this. Thank you to Dominic Hargreaves for reporting this vulnerability. This vulnerability is assigned CVE-2013-3372.

RT 3.8.0 and above are vulnerable to a MIME header injection in outgoing email generated by RT. The vectors via RT's stock templates are resolved by this patchset, but any custom email templates should be updated to ensure that values interpolated into mail headers do not contain newlines. This vulnerability is assigned CVE-2013-3373.

RT 3.8.0 and above are vulnerable to limited session re-use when using the file-based session store, Apache::Session::File. RT's default session configuration only uses Apache::Session::File for Oracle. RT instances using Oracle may be locally configured to use the database-backed Apache::Session::Oracle, in which case sessions are never re-used. The extent of session re-use is limited to information leaks of certain user preferences and caches, such as queue names available for ticket creation. Thank you to Jenny Martin for reporting the problem that lead to discovery of this vulnerability. This vulnerability is assigned CVE-2013-3374.

In addition to releasing RT versions 3.8.17 and 4.0.13 which address these issues, we also collected patches for all releases of 3.8.x and 4.0.x into a download available at:

The README in the tarball contains instructions for applying the patches. If you need help resolving these issues locally, we will provide discounted pricing for single-incident support; please contact us at for more information.

Versions of RT older than 3.8.0 are unsupported and do not receive security patches; please contact if you need assistance with an older RT version.

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