Security Advisories

PPS/POD and Essentials Scanning Bypass with Multi-part Attachments, CVE-2020-14009

Advisory ID: PFPT-SA-2021-0006

Proofpoint Enterprise Protection (PPS / PoD) contains a vulnerability that could allow an attacker to deliver an email message with a malicious attachment that bypasses scanning and file blocking rules. The vulnerability exists because messages with certain specially crafted or malformed MIME structures are not properly handled. A successful attack may result in the attachments being delivered to end users, but end users would need to open the attachments in order to be impacted. Further, this vulnerability only bypasses file-based checks on attachments; other controls within Proofpoint Enterprise Protection and Targeted Attack Protection, such as spam and impostor filtering, Proofpoint Dynamic Reputation, URL rewriting and click-time protection are unaffected. All versions of Proofpoint Enterprise Protection prior to 8.16.4 are affected by this vulnerability. Proofpoint Enterprise Protection 8.17.0 includes the fix, so no action is required by customers already running that version. Otherwise, updating to a fixed version is highly recommended.

Vulnerability Information

This vulnerability is identified by CVE-2020-14009. Proofpoint has released fixes to address this issue.

This vulnerability has been assigned a CVSS score of 7.1:

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Fixed Software

Proofpoint has released fixes in versions 8.13.16, 8.16.4, and 8.17.0.

Proofpoint customers can view the applicable release details for their deployment in the Proofpoint Community.

Proofpoint on Demand Customers

No action is required. Applicable fixes have already been deployed by Proofpoint.

Proofpoint on-premises Customers

No action is required for Enterprise Protection (PPS) Hardware and Virtual Appliance customers, running supported versions that are configured to deploy releases automatically. Applicable fixes have been automatically deployed.

For on-premise environments that are configured to manually apply releases, install the applicable release as noted above.

No mail flow will be interrupted while updates are applied.

For any questions or concerns, please contact Proofpoint Support.

URL

https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2021-0006

Revision History

Version Description Section Date
1.0 Initial release   May 5, 2021

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