Vulnerability Description
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 0x80206040. By crafting an input buffer we can control the execution path to the point where the constant DWORD 0 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Sophos | Safeguard Easy Device Encryption Client | 6.00 |
| Sophos | Safeguard Enterprise Client | 5.60.3 |
| Sophos | Safeguard Lan Crypt Client | 3.90.1 |
Related Weaknesses (CWE)
References
- http://seclists.org/fulldisclosure/2018/Jul/20Mailing ListThird Party Advisory
- https://community.sophos.com/kb/en-us/131934PatchVendor Advisory
- https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-ExploitTechnical DescriptionThird Party Advisory
- http://seclists.org/fulldisclosure/2018/Jul/20Mailing ListThird Party Advisory
- https://community.sophos.com/kb/en-us/131934PatchVendor Advisory
- https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-ExploitTechnical DescriptionThird Party Advisory
FAQ
What is CVE-2018-6851?
CVE-2018-6851 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 0x80206040. By crafting an input b...
How severe is CVE-2018-6851?
CVE-2018-6851 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-6851?
Check the references section above for vendor advisories and patch information. Affected products include: Sophos Safeguard Easy Device Encryption Client, Sophos Safeguard Enterprise Client, Sophos Safeguard Lan Crypt Client.