CVE-2018-6853
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 0x80206024.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.61%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 0x80206024. 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.
- CVSS 3.0
- 7.8 HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.61% probability · 48th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- sophos/safeguard easy device encryption client · sophos/safeguard enterprise client · sophos/safeguard lan crypt client
- Source
- cve@mitre.org
References
- http://seclists.org/fulldisclosure/2018/Jul/20Mailing List, Third Party Advisory
- https://community.sophos.com/kb/en-us/131934Patch, Vendor Advisory
- https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities/Exploit, Technical Description, Third Party Advisory
- http://seclists.org/fulldisclosure/2018/Jul/20Mailing List, Third Party Advisory
- https://community.sophos.com/kb/en-us/131934Patch, Vendor Advisory
- https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities/Exploit, Technical Description, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.