Local Privilege Escalation in Sophos SafeGuard Products
CVE-2018-6854

7.8HIGH

Key Information:

Vendor

Sophos
Status
Safeguard Lan Crypt Client
Safeguard Enterprise Client
Safeguard Easy Device Encryption Client
Vendor
CVE Published:
9 July 2018

What is CVE-2018-6854?

The vulnerability in Sophos SafeGuard products allows an attacker to escalate privileges locally through specific I/O control codes (IOCTLs). These IOCTLs fail to validate pointers and buffer sizes appropriately, potentially leading to unauthorized access. An attacker can exploit this flaw by supplying a controlled pointer to a kernel address, enabling modification of the SEP_TOKEN_PRIVILEGES structure of the exploited process's token. This manipulation can grant elevated privileges, allowing interaction with higher-tier processes and execution of code within a privileged security context, thus compromising system integrity.

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References

https://community.sophos.com/kb/en-us/131934
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http://seclists.org/fulldisclosure/2018/Jul/20
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https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018...
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CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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