Headline
CVE-2023-2868: Barracuda identified a vulnerability (CVE-2023-2868) in our Email Security Gateway appliance (ESG) on May 19, 2023.
A remote command injection vulnerability exists in the Barracuda Email Security Gateway (appliance form factor only) product effecting versions 5.1.3.001-9.2.0.006. The vulnerability arises out of a failure to comprehensively sanitize the processing of .tar file (tape archives). The vulnerability stems from incomplete input validation of a user-supplied .tar file as it pertains to the names of the files contained within the archive. As a consequence, a remote attacker can specifically format these file names in a particular manner that will result in remotely executing a system command through Perl’s qx operator with the privileges of the Email Security Gateway product. This issue was fixed as part of BNSF-36456 patch. This patch was automatically applied to all customer appliances.
Barracuda identified a vulnerability (CVE-2023-2868) in our Email Security Gateway appliance (ESG) on May 19, 2023.
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Update
Update on Email Security Gateway vulnerability previously identified on May 19, 2023, (https://nvd.nist.gov/vuln/detail/CVE-2023-2868) and Barracuda’s ongoing investigation. On May 30, 2023, Barracuda provided a Preliminary Summary of Key Findings which is available on our Trust Center here: (https://www.barracuda.com/company/legal/esg-vulnerability). This Preliminary Summary provides a timeline of events, key Indicators of Compromise (IOCs), and recommended actions for impacted customers.
We will continue actively monitoring of this situation, and we will be transparent in sharing details on what actions we are taking. Information gathering is ongoing as part of the investigation. We want to ensure we only share validated information with actionable steps for you to take. As we have information to share, we will provide updates via this product status page (https://status.barracuda.com) and direct outreach to impacted customers. Updates are also located on Barracuda’s Trust Center (https://www.barracuda.com/company/legal).
Posted May 30, 2023 - 15:38 UTC
Investigating
Barracuda identified a vulnerability (https://nvd.nist.gov/vuln/detail/CVE-2023-2868) in our Email Security Gateway appliance (ESG) on May 19, 2023. A security patch to eliminate the vulnerability was applied to all ESG appliances worldwide on Saturday, May 20, 2023. The vulnerability existed in a module which initially screens the attachments of incoming emails. No other Barracuda products, including our SaaS email security services, were subject to this vulnerability.
We took immediate steps to investigate this vulnerability. Based on our investigation to date, we’ve identified that the vulnerability resulted in unauthorized access to a subset of email gateway appliances. As part of our containment strategy, all ESG appliances have received a second patch on May 21, 2023. Users whose appliances we believe were impacted have been notified via the ESG user interface of actions to take. Barracuda has also reached out to these specific customers.
We will continue actively monitoring of this situation, and we will be transparent in sharing details on what actions we are taking. Information gathering is ongoing as part of the investigation. We want to ensure we only share validated information with actionable steps for you to take. As we have information to share, we will provide updates via this product status page (https://status.barracuda.com) and direct outreach to impacted customers. Updates are also located on Barracuda’s Trust Center (https://www.barracuda.com/company/legal).
Barracuda’s investigation was limited to the ESG product, and not the customer’s specific environment. Therefore, impacted customers should review their environments and determine any additional actions they want to take.
Your trust is important to us. We thank you for your understanding and support as we work through this issue and sincerely apologize for any inconvenience it may cause. If you have any questions, please reach out to [email protected].
Posted May 23, 2023 - 20:28 UTC
This incident affects: Email Security Gateway Appliance (Email Processing).
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