CVE-2017-10850 : What You Need to Know

A vulnerability in the Installers of various drivers for Fuji Xerox printers allows attackers to exploit an untrusted search path, potentially leading to elevated privileges.

Understanding CVE-2017-10850

This CVE identifies a security flaw in the code signing process of specific printer drivers, enabling malicious actors to insert a Trojan horse DLL and escalate their privileges.

What is CVE-2017-10850?

The vulnerability stems from the code signing timestamps being outdated in the affected printer driver installers, creating a security loophole for attackers to manipulate the system.

The Impact of CVE-2017-10850

The untrusted search path vulnerability in the affected printer drivers could be exploited by threat actors to gain elevated privileges on the target system, potentially leading to unauthorized access and control.

Technical Details of CVE-2017-10850

This section delves into the specifics of the vulnerability, including the affected systems, exploitation mechanism, and mitigation strategies.

Vulnerability Description

The vulnerability arises from outdated code signing timestamps in the installer files of various Fuji Xerox printer drivers, allowing attackers to place malicious DLL files in unspecified directories.

Affected Systems and Versions

The following printer driver installers are affected by this vulnerability:

ART EX Driver for ApeosPort-VI C7771/C6671/C5571/C4471/C3371/C2271
ART EX Driver for DocuCentre-VI C7771/C6671/C5571/C4471/C3371/C2271
PostScript Driver + Additional Feature Plug-in + PPD File for ApeosPort-VI C7771/C6671/C5571/C4471/C3371/C2271
PostScript Driver + Additional Feature Plug-in + PPD File for DocuCentre-VI C7771/C6671/C5571/C4471/C3371/C2271
XPS Print Driver for ApeosPort-VI C7771/C6671/C5571/C4471/C3371/C2271
XPS Print Driver for DocuCentre-VI C7771/C6671/C5571/C4471/C3371/C2271
ART EX Direct FAX Driver for ApeosPort-VI C7771/C6671/C5571/C4471/C3371/C2271
ART EX Direct FAX Driver for DocuCentre-VI C7771/C6671/C5571/C4471/C3371/C2271
Setting Restore Tool for ApeosPort-VI C7771/C6671/C5571/C4471/C3371/C2271
Setting Restore Tool for DocuCentre-VI C7771/C6671/C5571/C4471/C3371/C2271

Exploitation Mechanism

Attackers can exploit this vulnerability by inserting a malicious Trojan horse DLL in an unspecified directory, leveraging the outdated code signing timestamps to gain elevated privileges on the system.

Mitigation and Prevention

To address CVE-2017-10850 and enhance system security, consider the following mitigation strategies:

Immediate Steps to Take

Update the affected printer drivers to versions with secure code signing timestamps.
Implement robust access controls to prevent unauthorized DLL installations.

Long-Term Security Practices

Regularly monitor and update code signing practices to ensure the integrity of installer files.
Conduct security audits to identify and remediate vulnerabilities in printer driver installers.

Patching and Updates

Apply patches provided by Fuji Xerox to address the untrusted search path vulnerability in the affected printer drivers.