Fisheye and Crucible - Remote code execution through OGNL double evaluation - CVE-2017-16861

Note: As of September 2014 we are no longer issuing binary bug patches, instead we create new maintenance releases for the major versions we are backporting.

Summary of Vulnerability

This advisory discloses a critical severity security vulnerability which affects Fisheye and Crucible. All versions of Fisheye and Crucible before 4.4.5 (the fixed version for 4.4.x) and from 4.5.0 before 4.5.2 (the fixed version for 4.5.x) are affected by this vulnerability. 

Remote code execution through OGNL double evaluation (CVE-2017-16861)

Severity

Atlassian rates the severity level of this vulnerability as critical, according to the scale published in our Atlassian severity levels. The scale allows us to rank the severity as critical, high, moderate or low.

This is our assessment and you should evaluate its applicability to your own IT environment.

Description

It was possible for double OGNL evaluation in certain redirect action and in WebWork URL and Anchor tags in JSP files to occur. An attacker who can access the web interface of Fisheye or Crucible or who hosts a website that a user who can access the web interface of Fisheye or Crucible visits, is able to exploit this vulnerability to execute Java code of their choice on systems that run a vulnerable version of Fisheye or Crucible.

All versions of Fisheye and Crucible before 4.4.5 (the fixed version for 4.4.x) and from 4.5.0 before 4.5.2 (the fixed version for 4.5.x) are affected by this vulnerability. 

This issue can be tracked for Fisheye at:   https://jira.atlassian.com/browse/FE-6991.

This issue can be tracked for Crucible at  https://jira.atlassian.com/browse/CRUC-8156 .

Mitigation

This issue cannot be mitigated.

Fix

We have taken the following steps to address this issue:

1. Released Fisheye version 4.5.2 that contains a fix for this issue.
2. Released Crucible version 4.5.2 that contains a fix for this issue.
3. Released Fisheye version 4.4.5 that contains a fix for this issue.
4. Released Crucible version 4.4.5 that contains a fix for this issue.

What You Need to Do

Atlassian recommends that you upgrade to the latest version. For a full description of the latest version of Fisheye, see the release notes. You can download the latest version of Fisheye from the download centre. For a full description of the latest version of Crucible, see the release notes. You can download the latest version of Crucible from the download centre.

Upgrade Fisheye and Crucible to version 4.5.2 or higher.

If you are running Fisheye or Crucible 4.4.x and cannot upgrade to 4.5.2 then upgrade to version 4.4.5.

Support

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If you have questions or concerns regarding this advisory, please raise a support request at https://support.atlassian.com/.

References