PT-2018-17779 · Sophos · Sophos Safeguard Enterprise+2

Kyrecon + 1 · Published 2018-07-09 · Updated 2019-10-03 · CVE-2018-6854

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 multiple IOCTLs. When certain conditions in the user-controlled input buffer are not met, the driver writes an error code to a user-controlled address. The IOCTLs use transfer type METHOD NEITHER, which means the I/O manager does not validate supplied pointers and buffer sizes. This allows for supplying a pointer for the output buffer to a kernel address space address, enabling modification of the SEP TOKEN PRIVILEGES structure to grant SE DEBUG NAME privilege. This privilege allows the exploit process to interact with higher privileged processes running as SYSTEM and execute code in their security context.

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-2018-6854

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-2018-6854 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-6854 · Security Note
• http://seclists.org/fulldisclosure/2018/Jul/20 · Note