Home    |    View Topics    |    Search    |    Contact Us    |   



Category:   Application (Generic)  >   Bugzilla Vendors:
Bugzilla Account Creation Username Truncation Lets Remote Users Gain Elevated Privileges
SecurityTracker Alert ID:  1033542
SecurityTracker URL:
CVE Reference:   CVE-2015-4499   (Links to External Site)
Date:  Sep 11 2015
Impact:   User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 2.0 to 4.2.14, 4.3.1 to 4.4.9, 4.5.1 to 5.0
Description:   A vulnerability was reported in Bugzilla. A remote user can gain elevated privileges.

The system truncates long username values when creating accounts. A remote user can submit a specially crafted username value to create an account with a different email domain than the user's actual email domain. As a result, the user's account may be automatically and incorrectly added to groups that the user is not authorized for, depending on the group's regular expression setting and the user's username.

The original advisory is available at:

Netanel Rubin of PerimeterX reported this vulnerability.

Impact:   A remote user can gain unauthorized access to groups on the target system.
Solution:   The vendor has issued a fix (4.2.15, 4.4.10, 5.0.1).

The vendor's advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   None.

 Source Message Contents

Subject:  Security advisory for Bugzilla 5.0, 4.4.9, and 4.2.14


Bugzilla is a Web-based bug-tracking system used by a large number of
software projects. The following security issue has been discovered
in Bugzilla:

* Login names longer than 127 characters can be corrupted, which could
  lead to the creation of a user account with an unexpected email

All affected installations are encouraged to upgrade as soon as

Vulnerability Details

Class:       Unauthorized Account Creation
Versions:    Bugzilla 2.0 to 4.2.14, 4.3.1 to 4.4.9, 4.5.1 to 5.0
Fixed In:    4.2.15, 4.4.10, 5.0.1
Description: Login names (usually an email address) longer than 127
             characters are silently truncated in MySQL which could
             cause the domain name of the email address to be
             corrupted. An attacker could use this vulnerability to
             create an account with an email address different from the
             one originally requested. The login name could then be
             automatically added to groups based on the group's regular
             expression setting.
CVE Number:  CVE-2015-4499

Vulnerability Solutions

The fix for this issue is included in the 4.2.15, 4.4.10 and 5.0.1
releases. Upgrading to a release with the relevant fix will
protect your installation from possible exploits of this issue.

If you are unable to upgrade but would like to patch just the security
vulnerability, there are patches available for the issue at the
"References" URL.

Full release downloads, patches to upgrade Bugzilla from previous
versions, and git upgrade instructions are available at:


The Bugzilla team wish to thank the following people for their
assistance in locating, advising us of, and assisting us to fix these

Byron Jones
Netanel Rubin

General information about the Bugzilla bug-tracking system can be found

Comments and follow-ups can be directed to the
newsgroup or the support-bugzilla mailing list. has directions for accessing these

Go to the Top of This SecurityTracker Archive Page

Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2020, LLC