CVE-2018-6855

What it is

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.

At a glance

Exploitability

Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, service disruption.

Exploit odds

0.5% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2018-07-09 18:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 02:02 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.5% in the next 30 days (EPSS).
• Severity: 7.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2018-07-09 18:29 UTC

Last modified

2026-06-17 02:02 UTC

Exploit probability

0.5% · EPSS, next 30 days

Weakness

CWE-119 · Buffer errors

Record status

Modified

Affected

• Sophos Safeguard Easy Device Encryption Client 6.00
• Sophos Safeguard Easy Device Encryption Client 6.10
• Sophos Safeguard Easy Device Encryption Client 7.00
• Sophos Safeguard Enterprise Client 5.60.3
• Sophos Safeguard Enterprise Client 6.00
• Sophos Safeguard Enterprise Client 6.00.1
• Sophos Safeguard Enterprise Client 6.10
• Sophos Safeguard Enterprise Client 7.00

Attack profile CVSS 3.0 · 7.8

Attack vector

Local

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

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Read https://cve-list.com/agent/cve/CVE-2018-6855.md and follow it. Check whether this project is affected by CVE-2018-6855. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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