Vulnerability Monitor

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CVE-2018-6856


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 0x8020601C. By crafting an input buffer we can control the execution path to the point where a global variable will be written to a user controlled address. We can take advantage of this condition to zero-out the pointer to the security descriptor in the object header of a privileged process or modify the security descriptor itself and run code in the context of a process running as SYSTEM.


Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.8, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 3 products from sophos, from sophos, from sophos organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2018, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.


Published

2018-07-09T18:29:00.950

Last Modified

2024-11-21T04:11:18.187

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 7.8 (HIGH)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:C/I:C/A:C

  • Access Vector: LOCAL
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: COMPLETE
  • Integrity Impact: COMPLETE
  • Availability Impact: COMPLETE
Exploitability Score

3.9

Impact Score

10.0

Weaknesses
  • Type: Primary
    CWE-119

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application sophos safeguard_easy_device_encryption_client 6.00 Yes
Application sophos safeguard_easy_device_encryption_client 6.10 Yes
Application sophos safeguard_easy_device_encryption_client 7.00 Yes
Application sophos safeguard_enterprise_client 5.60.3 Yes
Application sophos safeguard_enterprise_client 6.00 Yes
Application sophos safeguard_enterprise_client 6.00.1 Yes
Application sophos safeguard_enterprise_client 6.10 Yes
Application sophos safeguard_enterprise_client 7.00 Yes
Application sophos safeguard_enterprise_client 8.00 Yes
Application sophos safeguard_lan_crypt_client 3.90.1 Yes
Application sophos safeguard_lan_crypt_client 3.90.2 Yes
Application sophos safeguard_lan_crypt_client 3.95.1 Yes
Application sophos safeguard_lan_crypt_client 3.95.1 Yes

References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For sophos's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.