Downloading executable files with Internet Explorer or Firefox fails with SEP 14.3 RU2 or higher

Products

• Endpoint Protection

Issue/Introduction

When downloading an executable (.exe) file with either Internet Explorer or Firefox browsers, the browser reports a failed download.  In the Downloads folder, the file may have been fully downloaded, but has a .partial or .part extension rather than .exe.  It may also be a zero-byte file with the correct file name.

Cause

Both of these browsers download files to a temporary file, then rename or copy it to the final file once the download completes.  In certain cases, the SONAR scan run by Endpoint Protection interferes with the browser when it is trying to execute this operation.  Typically this is seen with larger files which take longer for SEP to process.

Environment

Release : 14.3 RU2

Component : SONAR

Resolution

Symantec is currently investigating this issue and will update this document when a solution becomes available.  Until a solution is available, temporarily use SEP 14.3 RU1 MP1 or earlier to avoid this.

Additional Information

ESCRT-7619