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 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.
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/20Issue TrackingMailing 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/20Issue TrackingMailing 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-2018-6855?
CVE-2018-6855 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 0x80202014. By crafting an input b...
How severe is CVE-2018-6855?
CVE-2018-6855 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-2018-6855?
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.