CVE Vulnerability

CVE-2018-6855

Sophos SafeGuard Enterprise before 8.00.5, SafeGuard Easy before 7.00.3, and SafeGuard LAN Crypt before 3.95.2 are vulnerable to Local Privilege Escalation via IOCTL 0x80202014. By crafting an input buffer we can control the execution path to the point where the constant 0xFFFFFFF will be written to a user-controlled address. We can take advantage of this condition to modify the SEP_TOKEN_PRIVILEGES structure of the Token object belonging to the exploit process and grant SE_DEBUG_NAME privilege. This allows the exploit process to interact with higher privileged processes running as SYSTEM and execute code in their security context.

7.2 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 10

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Scope

7.8 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities/ Exploit Technical Description
https://community.sophos.com/kb/en-us/131934 Patch Vendor Advisory
http://seclists.org/fulldisclosure/2018/Jul/20 Issue Tracking Mailing List
Configurations

Configuration 1

cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.95.1:*:*:*:*:*:*:*
cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.90.2:*:*:*:*:*:*:*
cpe:2.3:a:sophos:safeguard_enterprise_client:8.00:*:*:*:*:*:*:*
cpe:2.3:a:sophos:safeguard_enterprise_client:7.00:*:*:*:*:*:*:*
cpe:2.3:a:sophos:safeguard_enterprise_client:6.10:*:*:*:*:*:*:*
cpe:2.3:a:sophos:safeguard_enterprise_client:6.00:*:*:*:*:*:*:*
cpe:2.3:a:sophos:safeguard_enterprise_client:6.00.1:*:*:*:*:*:*:*
cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:6.00:*:*:*:*:*:*:*
cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:6.10:*:*:*:*:*:*:*
cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:7.00:*:*:*:*:*:*:*
cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.95.1:ts:*:*:*:*:*:*
cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.90.1:ts:*:*:*:*:*:*
cpe:2.3:a:sophos:safeguard_enterprise_client:5.60.3:vs-nfd:*:*:*:*:*:*
Information

Published : 2018-07-09 06:29

Updated : 2019-10-03 12:03

NVD link : CVE-2018-6855

Mitre link : CVE-2018-6855

Products Affected
No products.
CWE
CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer