Vulnerability Note VU#672500

EPSON Network Utility installs EpsonBidirectionalService with insecure permissions

Original Release date: 27 Oct 2015 | Last revised: 19 Nov 2015

Overview

EPSON Network Utility contains a local privilege escalation vulnerability, which allows a local attacker to execute arbitrary code with SYSTEM privileges.

Description

CWE-276: Incorrect Default Permissions - CVE-2015-6034

EPSON Network Utility v4.10 is an application that checks the printer status and displays the printing progress over the network. During installation, the EPSON Network Utility creates EpsonBidirectionalService which runs as SYSTEM. The corresponding executable, eEBSVC.exe, has insecure permissions, allowing full access to the "Everyone" group in Windows. By replacing eEBSVC.exe with a malicious file of the same name, an attacker can execute arbitrary code with SYSTEM privileges.

Impact

A local, authenticated attacker can execute arbitrary code with SYSTEM privileges.

Solution

Apply an update

EPSON has released an update addressing CVE-2015-6034. Affected users are encouraged to update as soon as possible.

Vendor Information (Learn More)

VendorStatusDate NotifiedDate Updated
SEIKO EPSON Corp. / Epson America Inc.Affected14 Aug 201519 Nov 2015
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base 6.6 AV:L/AC:M/Au:S/C:C/I:C/A:C
Temporal 5.5 E:F/RL:OF/RC:C
Environmental 4.1 CDP:N/TD:M/CR:ND/IR:ND/AR:ND

References

Credit

Thanks to Will Hunt of 7Safe Ltd for reporting this vulnerability.

This document was written by Brian Gardiner.

Other Information

  • CVE IDs: CVE-2015-6034
  • Date Public: 27 Oct 2015
  • Date First Published: 27 Oct 2015
  • Date Last Updated: 19 Nov 2015
  • Document Revision: 41

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