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Published:

05 March 2021

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Resources > Security Bulletins > ESB-2021.0805 

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.0805
                       Joomla Security Announcements
                               5 March 2021

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Joomla! Core
Publisher:         Joomla! project
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Modify Arbitrary Files -- Existing Account            
                   Cross-site Scripting   -- Remote with User Interaction
                   Unauthorised Access    -- Existing Account            
                   Reduced Security       -- Unknown/Unspecified         
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-26029 CVE-2021-26028 CVE-2021-26027
                   CVE-2021-23132 CVE-2021-23131 CVE-2021-23130
                   CVE-2021-23129 CVE-2021-23128 CVE-2021-23127
                   CVE-2021-23126  

Original Bulletin: 
   http://feedproxy.google.com/~r/JoomlaSecurityNews/~3/v36E6N-ORY4/845-20210305-core-input-validation-within-the-template-manager.html
   http://feedproxy.google.com/~r/JoomlaSecurityNews/~3/OmcLuS1lR1s/841-20210301-core-insecure-randomness-within-2fa-secret-generation.html
   http://feedproxy.google.com/~r/JoomlaSecurityNews/~3/ML-7bfS-MuQ/842-20210302-core-potential-insecure-fofencryptrandval.html
   http://feedproxy.google.com/~r/JoomlaSecurityNews/~3/vRuZVgU3dZ4/843-20210303-core-xss-within-alert-messages-showed-to-users.html
   http://feedproxy.google.com/~r/JoomlaSecurityNews/~3/b__5EK05kBA/848-20210308-core-path-traversal-within-joomla-archive-zip-class.html
   http://feedproxy.google.com/~r/JoomlaSecurityNews/~3/IvmEUNGk7U8/844-20210304-core-xss-within-the-feed-parser-library.html
   http://feedproxy.google.com/~r/JoomlaSecurityNews/~3/u9ZYXtOiP5s/846-20210306-core-com-media-allowed-paths-that-are-not-intended-for-image-uploads.html
   http://feedproxy.google.com/~r/JoomlaSecurityNews/~3/xuNcUFlcISE/847-20210307-core-acl-violation-within-com-content-frontend-editing.html
   http://feedproxy.google.com/~r/JoomlaSecurityNews/~3/qW_FwiHz2vg/849-20210309-core-inadequate-filtering-of-form-contents-could-allow-to-overwrite-the-author-field.html

Comment: This bulletin contains nine (9) Joomla! project security advisories.

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[20210305] - Core - Input validation within the template manager

Project: Joomla!
SubProject: CMS
Impact: Low
Severity: Low
Versions: 3.2.0 - 3.9.24
Exploit type: Improper Input Validation
Reported Date: 2020-05-07
Fixed Date: 2021-03-02
CVE Number: CVE-2021-23131

Description

Missing input validation within the template manager.
Affected Installs

Joomla! CMS versions 3.2.0 - 3.9.24
Solution

Upgrade to version 3.9.25
Contact

The JSST at the Joomla! Security Centre.
Reported By: Bui Duc Anh Khoa from Viettel Cyber Security


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[20210301] - Core - Insecure randomness within 2FA secret generation

Project: Joomla!
SubProject: CMS
Impact: Low
Severity: Low
Versions: 3.2.0 - 3.9.24
Exploit type: Insecure Randomness
Reported Date: 2021-01-12
Fixed Date: 2021-03-02
CVE Number: CVE-2021-23126, CVE-2021-23127

Description

Usage of the insecure rand() function within the process of generating the  
2FA secret.
Usage of an insufficient length for the 2FA secret accoring to RFC 4226 of  
10 bytes vs 20 bytes.

This issue has been coordinated with Akeeba Ltd as contributor of  
the original FOF codebase to the core.
Affected Installs

Joomla! CMS versions 3.2.0 - 3.9.24
Solution

Upgrade to version 3.9.25
Contact

The JSST at the Joomla! Security Centre.
Reported By: Hanno Bock


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[20210302] - Core - Potential Insecure FOFEncryptRandval

Project: Joomla!
SubProject: CMS
Impact: Low
Severity: Low
Versions: 3.2.0 - 3.9.24
Exploit type: Insecure Randomness
Reported Date: 2021-01-13
Fixed Date: 2021-03-02
CVE Number: CVE-2021-23128

Description

The core shipped but unused randval implementation within FOF  
(FOFEncryptRandval) used an potential insecure implemetation. That has now  
been replaced with a call to "random_bytes()" and its backport that is  
shipped within random_compat.

This issue has been coordinated with Akeeba Ltd as contributor of  
the original FOF codebase to the core.
Affected Installs

Joomla! CMS versions 3.2.0 - 3.9.24
Solution

Upgrade to version 3.9.25
Contact

The JSST at the Joomla! Security Centre.
Reported By: Hanno Bock


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[20210303] - Core - XSS within alert messages showed to users

Project: Joomla!
SubProject: CMS
Impact: Moderate
Severity: Low
Versions: 2.5.0 - 3.9.24
Exploit type: XSS
Reported Date: 2020-05-07
Fixed Date: 2021-03-02
CVE Number: CVE-2021-23129

Description

Missing filtering of messages showed to users that could lead to xss issues.
Affected Installs

Joomla! CMS versions 2.5.0 - 3.9.24
Solution

Upgrade to version 3.9.25
Contact

The JSST at the Joomla! Security Centre.
Reported By: Bui Duc Anh Khoa from Viettel Cyber Security


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[20210308] - Core - Path Traversal within joomla/archive zip class


Project: Joomla!
SubProject: CMS
Impact: Moderate
Severity: Low
Versions: 3.0.0 - 3.9.24
Exploit type: Path Traversal
Reported Date: 2020-09-08
Fixed Date: 2021-03-02
CVE Number: CVE-2021-26028

Description

Extracting an specifilcy crafted zip package could write files outside of  
the intended path.
Affected Installs

Joomla! CMS versions 3.0.0 - 3.9.24
Solution

Upgrade to version 3.9.25
Contact

The JSST at the Joomla! Security Centre.
Reported By: Sarunas Paulauskas


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[20210304] - Core - XSS within the feed parser library

Project: Joomla!
SubProject: CMS
Impact: Moderate
Severity: Low
Versions: 2.5.0 - 3.9.24
Exploit type: XSS
Reported Date: 2020-05-05
Fixed Date: 2021-03-02
CVE Number: CVE-2021-23130

Description

Missing filtering of feed fields could lead to xss issues.
Affected Installs

Joomla! CMS versions 2.5.0 - 3.9.24
Solution

Upgrade to version 3.9.25
Contact

The JSST at the Joomla! Security Centre.
Reported By: Bui Duc Anh Khoa from Viettel Cyber Security


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[20210306] - Core - com_media allowed paths that are not intended for image  
uploads

Project: Joomla!
SubProject: CMS
Impact: Moderate
Severity: Low
Versions: 3.0.0 - 3.9.24
Exploit type: Improper Input Validation
Reported Date: 2020-02-17
Fixed Date: 2021-03-02
CVE Number: CVE-2021-23132

Description

com_media allowed paths that are not intended for image uploads.
Affected Installs

Joomla! CMS versions 3.0.0 - 3.9.24
Solution

Upgrade to version 3.9.25
Contact

The JSST at the Joomla! Security Centre.
Reported By: Hoang Kien from VSEC


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[20210307] - Core - ACL violation within com_content frontend editing

Project: Joomla!
SubProject: CMS
Impact: Moderate
Severity: Low
Versions: 3.0.0 - 3.9.24
Exploit type: ACL violation
Reported Date: 2020-10-25
Fixed Date: 2021-03-02
CVE Number: CVE-2021-26027

Description

Incorrect ACL checks could allow unauthorized change of the category for an  
article.
Affected Installs

Joomla! CMS versions 3.0.0 - 3.9.24
Solution

Upgrade to version 3.9.25
Contact

The JSST at the Joomla! Security Centre.
Reported By: Brian Teeman, George Wilson (JSST), David Jardin (JSST)


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[20210309] - Core - Inadequate filtering of form contents could allow to  
overwrite the author field

Project: Joomla!
SubProject: CMS
Impact: Moderate
Severity: Low
Versions: 1.6.0 - 3.9.24
Exploit type: ACL Violation
Reported Date: 2021-01-31
Fixed Date: 2021-03-02
CVE Number: CVE-2021-26029

Description

Inadequate filtering of form contents could allow to overwrite the author  
field. The affected core components are com_fields, com_categories,  
com_banners, com_contact, com_newsfeeds and com_tags. 
Affected Installs

Joomla! CMS versions 1.6.0 - 3.9.24
Solution

Upgrade to version 3.9.25
Contact

The JSST at the Joomla! Security Centre.
Reported By: DangKhai from Viettel Cyber Security

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===========================================================================
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The University of Queensland
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