Proofpoint Enterprise Protection HTML Injection in Email Body Through Email Subject Vulnerability

 

Proofpoint Enterprise Protection HTML Injection in Email Body Through Email Subject Vulnerability, CVE-2023-5770

Advisory ID: PFPT-SA-2023-0009

Proofpoint Enterprise Protection contains a vulnerability in the email delivery agent that allows an unauthenticated attacker to inject improperly encoded HTML into the email body of a message through the email subject.  The vulnerability is caused by inappropriate encoding when rewriting the email before delivery.

Vulnerability Information

This vulnerability is identified by CVE-2023-5770. Proofpoint has released patches to address this issue.

This vulnerability has been assigned a CVSS score of 5.3 MEDIUM:

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Fixed Software

Proofpoint has released fixed software versions:

8.20.2 patch 4809
8.20.0 patch 4805
8.18.6 patch 4804

All versions below the listed patch levels are vulnerable, including end-of-life software.  The fixed software versions are now available through the customer support portal.

Proofpoint On-Demand Customers

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

Proofpoint On-Premises Customers

If you are running a supported version that is configured to deploy releases automatically, no action is required.  Applicable fixes have been automatically deployed.

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

If you are running an end of life release please upgrade to a supported release as soon as possible.

For any questions or concerns please contact Proofpoint Support.

URL

https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2023-0009

Revision History

Version Description Section Date
1.0 Initial Release   January 9, 2024

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