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Category:   Application (Generic)  >   Bugzilla Vendors:
Bugzilla Access Control Flaw in 'report.cgi' Lets Remote Users Conduct Cross-Site Request Forgery Attacks
SecurityTracker Alert ID:  1040389
SecurityTracker URL:
CVE Reference:   CVE-2018-5123   (Links to External Site)
Date:  Feb 19 2018
Impact:   Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.16rc1 - 4.4.12, 4.5.1 - 5.0.3
Description:   A vulnerability was reported in Bugzilla. A remote user can conduct cross-site request forgery attacks.

A remote user can create a specially crafted HTML page or URL that, when loaded by the target authenticated user, will take actions on the target interface acting as the target user.

The image generation function in 'report.cgi' is affected.

Holger Fuhrmannek reported this vulnerability.

Impact:   A remote user can take actions on the target system acting as the target authenticated user.
Solution:   The vendor has issued a fix (4.4.13, 5.0.4).

The vendor advisory is available at:

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

Message History:   None.

 Source Message Contents

Subject:  Security advisory for Bugzilla 5.1.1, 5.0.3, and 4.4.12


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:

* A CSRF vulnerability in report.cgi would allow a third-party site
  to extract confidential information from a bug the victim had access to.

All affected installations are encouraged to upgrade as soon as

Vulnerability Details

Class:       Cross-Site Request Forgery
Versions:    Bugzilla 2.16rc1 to 4.4.12, 4.5.1 to 5.0.3
Fixed In:    4.4.13, 5.0.4
Description: Via the image generation in report.cgi, a malicious site
             using the presence of certain images, could extract
             potentially confidential information if the victim was
             logged in and could access the bug.
CVE Number:  CVE-2018-5123

Vulnerability Solutions

The fix for this issue is included in the 4.4.13 and 5.0.4
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 this

Reporter: Holger Fuhrmannek
Fixed by: Dylan Hardison

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

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