CVE-2018-6855
CVSS V2 High 7.2
CVSS V3 High 7.8
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.
Overview
- CVE ID
- CVE-2018-6855
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2018-07-09T18:29:00
- Last Modified Date
- 2019-10-03T00:03:26
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:6.00:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:6.10:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:7.00:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:sophos:safeguard_enterprise_client:5.60.3:vs-nfd:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:sophos:safeguard_enterprise_client:6.00:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:sophos:safeguard_enterprise_client:6.00.1:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:sophos:safeguard_enterprise_client:6.10:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:sophos:safeguard_enterprise_client:7.00:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:sophos:safeguard_enterprise_client:8.00:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.90.1:ts:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.90.2:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.95.1:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.95.1:ts:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:C/I:C/A:C
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- COMPLETE
- Integrity Impact
- COMPLETE
- Availability Impact
- COMPLETE
- Base Score
- 7.2
- Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 10
CVSS Version 3
- Version
- 3.0
- Vector String
- CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 7.8
- Base Severity
- HIGH
- Exploitability Score
- 1.8
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities/ | Exploit Technical Description Third Party Advisory |
| https://community.sophos.com/kb/en-us/131934 | Patch Vendor Advisory |
| http://seclists.org/fulldisclosure/2018/Jul/20 | Issue Tracking Mailing List Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2018-6855 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6855 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:44:06 | Added to TrackCVE | |||
| 2022-12-03 09:32:27 | 2018-07-09T18:29Z | 2018-07-09T18:29:00 | CVE Published Date | updated |
| 2022-12-03 09:32:27 | 2019-10-03T00:03:26 | CVE Modified Date | updated | |
| 2022-12-03 09:32:27 | Analyzed | Vulnerability Status | updated |