This week, we are releasing two CVE TTPs:
In Confluence Server and Data Center, before 6.13.23, from 6.14.0 before 7.4.11, from 7.5.0 before 7.11.6, and from 7.12.0 before 7.12.5, an OGNL vulnerability exists that allows an unauthenticated user to remotely execute code on the server. The exploit requires sending an HTTP POST request to the Confluence Server containing the template engine exploit. When Confluence handles this POST request the template engine executes the template code and no further user interaction is required.
Execute Operator’s CVE-2021-26084 TTP on each Confluence Server instance in your environment to test if you are vulnerable.
The TTP is configured to send a POST request to localhost using the default Confluence Server port 8090. Depending on your Confluence configuration, and whether this TTP is being run on the server or remotely, it may be necessary to adjust the URL in the TTP file. When the exploit is successful the HTTP POST response will contain the string `CVE-2021-26084` in the message body.
Vulnerability scanners typically test this CVE by relying on the Confluence version, or remote exploitation of the Confluence Server via the specially crafted request.
Upgrade Confluence Server & Data Center to the latest version. Atlassian has published a security advisory with instructions for patching.
Kostya Kortchinsky, a Databricks cybersecurity researcher, reported the recently discovered Apache Spark bug (CVE-2022-33891). This issue allows adversaries to execute arbitrary shell commands as a current Spark user. Due to Spark UI's sparks.acls.enable option, arbitrary command execution occurs when Spark uses a raw Linux command to check the group membership of the user passed in the `?doAs` parameter. The command output is placed in the `id` field in the response.
Execute Operator’s CVE-2022-33891 TTP on each instance running Apache Spark in your environment to test if you are vulnerable.
The TTP is configured to upload a web shell to the machine, run a command, and check for a specific output. If the output is successful then the TTP will remove the web shell from your filesystem.
It is strongly advised to update to Apache Spark 3.1.3, 3.2.2, or 3.3.0 maintenance release to safeguard your instances against potential exploitation attempts.
Check out the TTP “Is CVE-2022-33891 patched on this host?” here.
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