[rt-announce] RT 4.0.25 released
Shawn M Moore
shawn at bestpractical.com
Wed Jul 26 16:37:57 EDT 2017
RT 4.0.25 -- 2017-07-26
We're pleased to announce the general availability of RT 4.0.25. This
release introduces several important security fixes as well as a handful
of bugfixes. Please be aware that we intend for the 4.0.25 release to be
the final release of the RT 4.0 series and no further security or bug
fixes will be published.
The list of security fixes is included below, followed by other
improvements and bugfixes.
- Shawn M Moore, for Best Practical
* RT 4.0.0 and above are vulnerable to an information leak of cross-site
request forgery (CSRF) verification tokens if a user visits a specific
URL crafted by an attacker. This vulnerability is assigned
CVE-2017-5943. It was discovered by a third-party security researcher.
* RT 4.0.0 and above are vulnerable to a cross-site scripting (XSS) attack
if an attacker uploads a malicious file with a certain content type.
Installations which use the AlwaysDownloadAttachments config setting are
unaffected. This fix addresses all existant and future uploaded
attachments. This vulnerability is assigned CVE-2016-6127. This was
responsibly disclosed to us first by Scott Russo and the GE Application
Security Assessment Team.
* One of RT's dependencies, a Perl module named Email::Address, has a
denial of service vulnerability which could induce a denial of service
of RT itself. We recommend administrators install Email::Address version
1.908 or above, though we additionally provide a new workaround within
RT. The Email::Address vulnerability was assigned CVE-2015-7686. This
vulnerability's application to RT was brought to our attention by Pali
* RT 4.0.0 and above are vulnerable to timing side-channel attacks for
user passwords. By carefully measuring millions or billions of login
attempts, an attacker could crack a user's password even over the
internet. RT now uses a constant-time comparison algorithm for secrets
to thwart such attacks. This vulnerability is assigned CVE-2017-5361.
This was responsibly disclosed to us by Aaron Kondziela.
* RT's ExternalAuth feature is vulnerable to a similar timing side-channel
attack. Both RT 4.0/4.2 with the widely-deployed RT::Authen::ExternalAuth
extension, as well as the core ExternalAuth feature in RT 4.4 are
vulnerable. Installations which don't use ExternalAuth, or which use
ExternalAuth for LDAP/ActiveDirectory authentication, or which use
ExternalAuth for cookie-based authentication, are unaffected. Only
ExternalAuth in DBI (database) mode is vulnerable.
* RT 4.0.0 and above are potentially vulnerable to a remote code execution
attack in the dashboard subscription interface. A privileged attacker
can cause unexpected code to be executed through carefully-crafted saved
search names. Though we have not been able to demonstrate an actual
attack owing to other defenses in place, it could be possible. This fix
addresses all existant and future saved searches. This vulnerability is
assigned CVE-2017-5944. It was discovered by an internal security audit.
* RT 4.0.0 and above have misleading documentation which could reduce
system security. The RestrictLoginReferrer config setting (which has
security implications) was inconsistent with its implementation, which
checked for a slightly different variable name. RT will now check for the
incorrect name and produce an error message. This was responsibly
disclosed to us by Alex Vandiver.
General user UI
* Make sub-menus accessible on screen-readers
* Respect the user's chosen units for Time Worked across page loads, instead
of always defaulting to minutes (I#17985)
* In Jumbo, preserve ticket basics so in progress changes persist after
returning to the page
* Fix a regression in 4.0.20 which caused some users to have
blank homepages (I#30106)
* Include the new Request Tracker logo
* We now correctly shred ObjectCustomFields records when shredding a
* Avoid issues with dual-life module installation on older, patched perls
* Explicitly depend on Class::Accessor::Fast, not Class::Accessor
* Fix potential upgrade failure in e.g. etc/upgrade/upgrade-articles
* Avoid regex deprecation warnings on perl 5.21.1+
* Avoid issues with modern Perl versions excluding ./ from @INC
* Avoid broken DateTime::Locale versions (I#31542)
* Avoid incompatible DBD::mysql version (I#32670)
* Fix RT::Attribute->DeleteSubValue
* Remove duplicated content-encoding handling in OriginalContent
* Update links to the RT wiki
* Update mailing list references to point to community forum
* Update translations for: Arabic, Catalan, Czech, Occitan, Persian,
Serbian, and Slovak
A complete changelog is available from git by running:
git log rt-4.0.24..rt-4.0.25
More information about the rt-announce