• [20190502] - Core - By-passing protection of Phar Stream Wrapper Interceptor

    Posted: 07 May 2019 05:00 PM PDT

    Project: Joomla!
    SubProject: CMS
    Impact: Low
    Severity: Low
    Versions: 3.9.3 through 3.9.5
    Exploit type: Object Injection
    Reported Date: 2019-March-27
    Fixed Date: 2019-May-07

    Description

    In Joomla 3.9.3, the vulnerability of insecure deserialization when executing Phar archives was addressed by removing the known attack vector in the Joomla core. In order to intercept file invocations like file_exists or stat on compromised Phar archives the base name has to be determined and checked before allowing to be handled by PHP Phar stream handling. The used implementation however is vulnerable to path traversal leading to scenarios where the Phar archive to be assessed is not the actual (compromised) file.
    Affected Installs

    Joomla! CMS versions 3.9.3 through 3.9.5
    Solution

    Upgrade to version 3.9.6
    Contact

    The JSST at the Joomla! Security Centre.
    Reported By: Daniel le Gall, Fix coordinated by Oliver Hader from TYPO3

    [20190501] - Core - XSS in com_users ACL debug views

    Posted: 07 May 2019 08:00 AM PDT

    Project: Joomla!
    SubProject: CMS
    Impact: Moderate
    Severity: Low
    Versions: 1.7.0 through 3.9.5
    Exploit type: XSS
    Reported Date: 2019-April-29
    Fixed Date: 2019-May-07
    CVE Number: CVE-2019-11809

    Description

    The debug views of com_users do not properly escape user supplied data, which leads to a potential XSS attack vector.
    Affected Installs

    Joomla! CMS versions 1.7.0 through 3.9.5
    Solution

    Upgrade to version 3.9.6

How to Upgrade Joomla Tutorial at Joomla.org

  • Missing ACL check in sample data plugins
  • Impact: Moderate
  • Severity: High

In the "Sample Data" plugin. You can disable this plugin to prevent exploitation.

Affected Installs

Joomla! CMS versions 3.8.0 through 3.9.3

Solution

Upgrade to version 3.9.4

How to Upgrade Joomla Tutorial at Joomla.org

All issues are low severity

Affected Installs

Joomla! CMS versions 2.5.0 through 3.9.2

Solution

Upgrade to version 3.9.3

How to Upgrade Joomla Tutorial at Joomla.org

Please update to Joomla 3.8.13 as soon as possible.
The security threats are all low, but it never hurts to use the most secure version of Joomla for peace of mind.

Fixes and improvement in Joomla version 3.8.13

  • Added additional CSRF hardening in com_installer actions in the backend
  • In case that an attacker gets access to the mail account of an user who can approve admin verifications in the registration process he can activate himself.
  • Inadequate checks on the tags search fields can lead to an access level violation.
  • Joomla’s com_joomlaupdate allows the execution of arbitrary code. The default ACL config enabled access of Administrator-level users to access com_joomlaupdate and trigger a code execution.
  • Inadequate checks in com_contact could allowed mail submission in disabled forms.

Joomla! Security News


[20180602] - Core - XSS vulnerability in language switcher module

Posted: 26 Jun 2018 06:30 AM PDT

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Low
  • Severity: Low
  • Versions: 1.6.0 through 3.8.8
  • Exploit type: XSS
  • Reported Date: 2018-May-07
  • Fixed Date: 2018-June-26
  • CVE Number: CVE-2018-12711

Description

In some cases the link of the current language might contain unescaped HTML special characters. This may lead to reflective XSS via injection of arbitrary parameters and/or values on the current page url.

Affected Installs

Joomla! CMS versions 1.6.0 through 3.8.8

Solution

Upgrade to version 3.8.9

Contact

The JSST at the Joomla! Security Centre.

Reported By: Borja Lorenzo, Innotecsystem

[20180601] - Core - Local File Inclusion with PHP 5.3

Posted: 26 Jun 2018 06:30 AM PDT

  • Project: Joomla!
  • SubProject: CMS
  • Impact: Low
  • Severity: Low
  • Versions: 2.5.0 through 3.8.8
  • Exploit type: LFI
  • Reported Date: 2018-April-23
  • Fixed Date: 2018-June-26
  • CVE Number: CVE-2018-12712

Description

Our autoload code checks classnames to be valid, using the "class_exists" function in PHP. In PHP 5.3 this function validates invalid names as valid, which can result in a Local File Inclusion.

Affected Installs

Joomla! CMS versions 2.5.0 through 3.8.8

Solution

Upgrade to version 3.8.9

Contact

The JSST at the Joomla! Security Centre.

Reported By: Davide Tampellini

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