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AUSCERT External Security Bulletin Redistribution
ESB-2022.2737.5
CVE-2022-26134 - Critical severity unauthenticated remote code execution
vulnerability in Confluence Server and Data Center
13 June 2022
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Confluence Server
Confluence Data Center
Publisher: Atlassian
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Resolution: Patch/Upgrade
CVE Names: CVE-2022-26134
Original Bulletin:
https://confluence.atlassian.com/doc/confluence-security-advisory-2022-06-02-1130377146.html
Comment: CVSS (Max): None available when published
Revision History: June 13 2022: Updated the Mitigation section with steps for Confluence version 6.0.0 and above.
June 6 2022: Atlassian has released fixed versions to address this vulnerability
June 3 2022: AusCERT recommends affected users regularly check for updated advice from Atlassian as the situation evolves
June 3 2022: Atlassian added a WAF rule to reduce the risk of exploitation as a mitigation measure
June 3 2022: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
Confluence Server and Data Center - CVE-2022-26134 - Critical severity
unauthenticated remote code execution vulnerability
Update: This advisory has been updated since its original publication.
Specific updates include:
10 Jun 2022 3 PM PDT (Pacific Time, -7 hours)
o Updated the Mitigation section with steps for Confluence version 6.0.0 and
above.
03 Jun 2022 4 PM PDT (Pacific Time, -7 hours)
o Updated to clarify limitation with rolling upgrades in the What You Need to
Do section.
03 Jun 2022 10 AM PDT (Pacific Time, -7 hours)
o Updated with the fixed versions
o Removed interim advice about adding a WAF rule from the What You Need to Do
section
03 Jun 2022 8 AM PDT (Pacific Time, -7 hours)
o Updating mitigation information to include replacement jar and class files
03 Jun 2022
o Clarifying the affected versions
o Adding a WAF rule to the What You Need to Do section
o Adding estimated timeframe for fixes to be available
+------------+----------------------------------------------------------------+
| Summary |CVE-2022-26134 - Critical severity unauthenticated remote code |
| |execution vulnerability in Confluence Server and Data Center |
+------------+----------------------------------------------------------------+
| Advisory |02 Jun 2022 1 PM PDT (Pacific Time, -7 hours) |
|Release Date| |
+------------+----------------------------------------------------------------+
| | o Confluence |
| Affected | |
| Products | ? Confluence Server |
| | |
| | ? Confluence Data Center |
+------------+----------------------------------------------------------------+
| | o All supported versions of Confluence Server and Data Center |
| Affected | are affected. |
| Versions | |
| | o Confluence Server and Data Center versions after 1.3.0 are |
| | affected. |
+------------+----------------------------------------------------------------+
| | o 7.4.17 |
| | |
| | o 7.13.7 |
| | |
| | o 7.14.3 |
| Fixed | |
| Versions | o 7.15.2 |
| | |
| | o 7.16.4 |
| | |
| | o 7.17.4 |
| | |
| | o 7.18.1 |
+------------+----------------------------------------------------------------+
| CVE ID(s) |CVE-2022-26134 |
+------------+----------------------------------------------------------------+
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
Atlassian has been made aware of current active exploitation of a critical
severity unauthenticated remote code execution vulnerability in Confluence Data
Center and Server. The OGNL injection vulnerability allows an unauthenticated
user to execute arbitrary code on a Confluence Server or Data Center instance.
All versions of Confluence Server and Data Center prior to the fixed versions
listed above are affected by this vulnerability.
This issue can be tracked here:
CONFSERVER-79016 - Getting issue details... STATUS
Atlassian Cloud sites are protected
If your Confluence site is accessed via an atlassian.net domain, it is hosted
by Atlassian and is not vulnerable. Our investigations have not found any
evidence of exploitation of Atlassian Cloud.
Fix
We have taken the following steps to address this issue:
o Released versions 7.4.17, 7.13.7, 7.14.3, 7.15.2, 7.16.4, 7.17.4 and 7.18.1
which contain a fix for this issue.
What You Need to Do
Atlassian recommends that you upgrade to the latest Long Term Support release.
For a full description of the latest version, see the Confluence Server and
Data Center Release Notes. You can download the latest version from the
download centre.
Note: If you run Confluence in a cluster, you will not be able to upgrade to
the fixed versions without downtime, also known as a rolling upgrade. Follow
the steps in Upgrading Confluence Data Center.
Mitigation
If you are unable to upgrade Confluence immediately, then as a temporary
workaround, you can mitigate the CVE-2022-26134 issue by updating the following
files for the specific version of the product.
For Confluence 7.15.0 - 7.18.0
If you run Confluence in a cluster, you will need to repeat this process on
each node. You don't need to shut down the whole cluster to apply this
mitigation.
1. Shut down Confluence.
2. Download the following 1 file to the Confluence server:
? xwork-1.0.3-atlassian-10.jar
3. Delete (or move the following JAR outside of the Confluence install
directory):
<confluence-install>/confluence/WEB-INF/lib/xwork-1.0.3-atlassian-8.jar
(warning) Do not leave a copy of this old JAR in the directory.
4. Copy the downloaded xwork-1.0.3-atlassian-10.jar into <confluence-install>/
confluence/WEB-INF/lib/
5. Check the permissions and ownership on the new xwork-1.0.3-atlassian-10.jar
file matches the existing files in the same directory.
6. Start Confluence.
Remember, If you run Confluence in a cluster, make sure you apply the above
update on all of your nodes.
For Confluence 6.0.0 - Confluence 7.14.2
If you run Confluence in a cluster, you will need to repeat this process on
each node. You don't need to shut down the whole cluster to apply this
mitigation.
1. Shut down Confluence.
2. Download the following 3 files to the Confluence server:
? xwork-1.0.3-atlassian-10.jar
? webwork-2.1.5-atlassian-4.jar
? CachedConfigurationProvider.class
3. Delete (or move the following JARs outside of the Confluence install
directory):
<confluence-install>/confluence/WEB-INF/lib/xwork-1.0.3.6.jar
<confluence-install>/confluence/WEB-INF/lib/webwork-2.1.5-atlassian-3.jar
(warning) Do not leave a copy of the old JARs in the directory.
4. Copy the downloaded xwork-1.0.3-atlassian-10.jar into <confluence-install>/
confluence/WEB-INF/lib/
5. Copy the downloaded webwork-2.1.5-atlassian-4.jar into <confluence-install>
/confluence/WEB-INF/lib/
6. Check the permissions and ownership on both new files matches the existing
files in the same directory.
7. Change to directory <confluence-install>/confluence/WEB-INF/classes/com/
atlassian/confluence/setup
1. Create a new directory called webwork
2. Copy CachedConfigurationProvider.class into <confluence-install>/
confluence/WEB-INF/classes/com/atlassian/confluence/setup/webwork
3. Ensure the permissions and ownership are correct for:
<confluence-install>/confluence/WEB-INF/classes/com/atlassian/confluence/setup/webwork
<confluence-install>/confluence/WEB-INF/classes/com/atlassian/confluence/setup/webwork/CachedConfigurationProvider.class
8. Start Confluence.
Remember, If you run Confluence in a cluster, make sure you apply the above
update on all of your nodes.
Note: Confluence End Of Life versions are not fully tested with the workaround.
We strongly recommend upgrading to a fixed version of Confluence as there are
several other security fixes included in the fixed versions of Confluence.
Acknowledgments
We would like to thank Volexity for identifying this vulnerability.
Last modified on Jun 10, 2022
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