UPDATE 2: We have published 5.2.12 incremental and full versions. These include all security related enhancements as well as the missing file that triggers the version increment.

Please Note: if you downloaded 5.2.11, your update is incomplete. Please deploy 5.2.12 to ensure the software version increments properly. Version 5.1.13 was not affected by this packaging deficiency.

UPDATE: We’ve identified a missing file in 5.2.11 which causes the version number not to increment. All security related enhancements are present. We will be updating this post again with version 5.2.12 which will contain the complete change set. Thank you for you patience.

WHMCS has released new patches for the 5.2 and 5.1 minor releases. These updates provide targeted changes to address security concerns with the WHMCS product. You are highly encouraged to update immediately.

WHMCS has rated these updates as having critical & important security impacts. Information on security ratings is available athttp://docs.whmcs.com/Security_Levels

Releases
The following patch release versions of WHMCS have been published to address all known vulnerabilities:
v5.2.12
v5.1.13

Security Issue Information

These updates resolve the following issues:

> Information disclosure via the client area as published by ‘localhost’
> HTTP Split Attack discovered by the WHMCS Development Team
> SQL Injection Vulnerability discovered by the WHMCS Development Team
> Privilege boundaries not being enforced on addons reported by Vlad C of NetSec Interactive
> Download directory traversal reported privately by an individual
> Lack of input validation in data feeds input discovered by the WHMCS Development Team
> Deficient Null Byte sanitization on input discovered by the WHMCS Development Team

Important Fix Information

These updates also include the following non-security related functional fixes:

> Improved validation of monetary amounts
> Moneris Vault Gateway compatibility update
> Credit cards not processing under certain conditions
> Correction to internal logic for testing Authorize.net payment gateway

Mitigation

WHMCS Version 5.2

Download and apply the appropriate patch files to protect against these vulnerabilities.

Patch files for affected versions of the 5.2 series are located on the WHMCS site as itemized below.

v5.2.12 (full version) – Downloadable from the WHMCS Members Area
MD5 Checksum: fd2500df9068b7c00a9452ef31cfd522

v5.2.12 (patch only; for 5.2.10 or 5.2.11 ) – http://go.whmcs.com/254/5212_incremental 
MD5 Checksum: dbf1f18f98c14d5f212f6e4bc249cca6

To apply a patch, download the files indicated above and replace the files within your installation.
No upgrade process is required.

WHMCS Version 5.1

Download and apply the appropriate patch files to protect against these vulnerabilities.

Patch files for affected versions of the 5.1 series are located on the WHMCS site as itemized below.

v5.1.13 (patch only; for 5.1.12) – http://go.whmcs.com/250/5113_incremental 
MD5 Checksum: e06d0033c388a8f2c43e24134fe8bd63

To apply a patch, download the files indicated above and replace the files within your installation.
No upgrade process is required.

All versions of WHMCS are affected by these vulnerabilities, however only 5.1 and 5.2 will be provided updates per our Long Term Support Policy.

You can read more about our Long Term Support Policy here:

http://docs.whmcs.com/Long_Term_Support

From WHMCS Security Advisories Blog:

As you may be aware, a security issue has been published within the last hour which allows for information disclosure.

We are aware of the issue and are investigating it, and will be issuing a fix for this issue along with any others we discover during our targeted investigation shortly. In the meantime disabling the Mass Payment feature voids the immediate threat.

You can do this by de-selecting the “Enable Mass Payment” checkbox in Setup > General Settings > Invoices and saving.

Please watch our blog, facebook and twitter feeds to receive the latest updates.

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We (VeeroTech) recommend temporarily adding the following lines to your WHMCS configuration file “after” the first php tag:

 

if(isset($_REQUEST[‘invoiceids’]) && is_array($_REQUEST[‘invoiceids’])) { die(‘no’); }
if(isset($_REQUEST[‘geninvoice’]) && is_array($_REQUEST[”])) { die(‘no’); }

We (VeeroTech) also recommend that all WHMCS users disable the option for new signups without services. This can be done by unchecking the check box for “Allow Client Registration” under Settings > General Settings > Other

We realize this may break functionality for those utilizing the build in affiliate program however, it will aid in keeping malicious users from creating accounts inside your system.

WHMCS has released new patches for the 5.2 and 5.1 minor releases. These updates provide targeted changes to address security concerns with the WHMCS product. You are highly encouraged to update immediately.

WHMCS has rated these updates as having critical security impacts. Information on security ratings is available at http://docs.whmcs.com/Security_Levels

Releases
The following patch release versions of WHMCS have been published to address a specific privilege and SQL vulnerabilities:
v5.2.10
v5.1.12

Security Issue Information

These changes resolve security issues identified by public disclosure. The follow security issues have been addressed within the latest patches:
– Missing Cross Site Request Forgery Token checks for certain operations related to Product Bundles and Product Configuration
– SQL Injection viable due to improper validation of expected numeric data
– Enforce privilege boundaries for particular ticket actions

Important Fix Information
These changes also include important functional fixes that were produced from previous security patches:
– SQL error in getting ticket departments (5.1 only)
– Mass mail client filter excluding users set to default language
– Admin clients list displaying multiple instances of the same record in certain conditions
– Prevent user input from manipulating IP Ban logic (5.2 only)

Mitigation

WHMCS Version 5.2

Download and apply the appropriate patch files to protect against these vulnerabilities.

Patch files for affected versions of the 5.2 series are located on the WHMCS site as itemized below.

v5.2.10 (full version) – Downloadable from the WHMCS Members Area
v5.2.10 (patch only; for 5.2.9 ) – http://go.whmcs.com/242/5210_incremental 

To apply a patch, download the files indicated above and replace the files within your installation.
No upgrade process is required.

WHMCS Version 5.1

Download and apply the appropriate patch files to protect against these vulnerabilities.

Patch files for affected versions of the 5.1 series are located on the WHMCS site as itemized below.

v5.1.12 (patch only; for 5.1.11) – http://go.whmcs.com/246/5112_incremental 

To apply a patch, download the files indicated above and replace the files within your installation.
No upgrade process is required.

All versions of WHMCS are affected by this vulnerability, however only 5.1 and 5.2 will be provided updates per our Long Term Support Policy.

You can read more about our Long Term Support Policy here:

http://docs.whmcs.com/Long_Term_Support