CVE-2018-6857 : Vulnerability Insights and Analysis

Sophos SafeGuard Enterprise, SafeGuard Easy, and SafeGuard LAN Crypt versions before 8.00.5, 7.00.3, and 3.95.2 respectively are vulnerable to a Local Privilege Escalation issue through IOCTL 0x802022E0.

Understanding CVE-2018-6857

This CVE involves a security vulnerability that allows attackers to escalate privileges locally on affected systems.

What is CVE-2018-6857?

The vulnerability in Sophos SafeGuard products enables attackers to manipulate the execution path, granting higher privileges to exploit processes.

The Impact of CVE-2018-6857

Exploiting this vulnerability allows attackers to execute code within the security context of processes running with SYSTEM privileges.

Technical Details of CVE-2018-6857

This section provides in-depth technical insights into the CVE-2018-6857 vulnerability.

Vulnerability Description

Crafting an input buffer allows attackers to write the value 0x12 to a user-controlled memory address.
Modification of the SEP_TOKEN_PRIVILEGES structure grants the exploit process the SE_DEBUG_NAME privilege.

Affected Systems and Versions

Sophos SafeGuard Enterprise versions before 8.00.5
SafeGuard Easy versions before 7.00.3
SafeGuard LAN Crypt versions before 3.95.2

Exploitation Mechanism

Attackers can exploit IOCTL 0x802022E0 to manipulate the execution path and gain elevated privileges.

Mitigation and Prevention

Protect your systems from CVE-2018-6857 with these mitigation strategies.

Immediate Steps to Take

Update affected Sophos SafeGuard products to versions 8.00.5, 7.00.3, and 3.95.2 or newer.
Monitor and restrict access to critical system functions.

Long-Term Security Practices

Implement the principle of least privilege to limit access rights for users and processes.
Regularly audit and update security configurations to address potential vulnerabilities.

Patching and Updates

Apply security patches and updates provided by Sophos to address the CVE-2018-6857 vulnerability.