PT-2018-17781 · Sophos · Sophos Safeguard Enterprise+2

Kyriakos Economou · Published 2018-07-09 · Updated 2019-10-03 · CVE-2018-6856

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Sophos SafeGuard Enterprise versions prior to 8.00.5 Sophos SafeGuard Easy versions prior to 7.00.3 Sophos SafeGuard LAN Crypt versions prior to 3.95.2

Description The issue allows for Local Privilege Escalation via IOCTL 0x8020601C. By crafting an input buffer, an attacker can control the execution path to the point where a global variable will be written to a user-controlled address. This condition can be exploited to zero-out the pointer to the security descriptor in the object header of a privileged process or modify the security descriptor itself, allowing code to run in the context of a process running as SYSTEM.

Recommendations For Sophos SafeGuard Enterprise versions prior to 8.00.5, update to version 8.00.5 or later. For Sophos SafeGuard Easy versions prior to 7.00.3, update to version 7.00.3 or later. For Sophos SafeGuard LAN Crypt versions prior to 3.95.2, update to version 3.95.2 or later.

Exploit

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

CVE-2018-6856

Affected Products

Sophos Safeguard Easy

Sophos Safeguard Enterprise

Sophos Safeguard Lan Crypt

References · 5

• 🔥 https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities · Exploit
• https://community.sophos.com/kb/en-us/131934 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-6856 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-6856 · Security Note
• http://seclists.org/fulldisclosure/2018/Jul/20 · Note