CVE-2018-6857

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 0x802022E0. By crafting an input buffer we can control the execution path to the point where the constant 0x12 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 v3 7.8 HIGH
CVSS v2.0 7.2 HIGH

7.8^/10

CVSS v3 : HIGH

V3 Legend

Vector : AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.2^/10

CVSS v2.0 : HIGH

V2 Legend

Vector : AV:L/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 3.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
http://seclists.org/fulldisclosure/2018/Jul/20	Mailing List Third Party Advisory
https://community.sophos.com/kb/en-us/131934	Patch 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/20	Mailing List Third Party Advisory
https://community.sophos.com/kb/en-us/131934	Patch Vendor Advisory
https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities/	Exploit Technical Description Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:6.00:::::::*
	cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:6.10:::::::*
	cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:7.00:::::::*
	cpe:2.3:a:sophos:safeguard_enterprise_client:5.60.3:vs-nfd::::::
	cpe:2.3:a:sophos:safeguard_enterprise_client:6.00:::::::*
	cpe:2.3:a:sophos:safeguard_enterprise_client:6.00.1:::::::*
	cpe:2.3:a:sophos:safeguard_enterprise_client:6.10:::::::*
	cpe:2.3:a:sophos:safeguard_enterprise_client:7.00:::::::*
	cpe:2.3:a:sophos:safeguard_enterprise_client:8.00:::::::*
	cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.90.1:ts::::::
	cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.90.2:::::::*
	cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.95.1:::::::*
	cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.95.1:ts::::::

History

21 Nov 2024, 04:11

Type	Values Removed	Values Added
References	~~() http://seclists.org/fulldisclosure/2018/Jul/20 - Mailing List, Third Party Advisory~~	() http://seclists.org/fulldisclosure/2018/Jul/20 - Mailing List, Third Party Advisory
References	~~() https://community.sophos.com/kb/en-us/131934 - Patch, Vendor Advisory~~	() https://community.sophos.com/kb/en-us/131934 - Patch, Vendor Advisory
References	~~() https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities/ - Exploit, Technical Description, Third Party Advisory~~	() https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities/ - Exploit, Technical Description, Third Party Advisory

Information

Published : 2018-07-09 18:29

Updated : 2024-11-21 04:11

NVD link : CVE-2018-6857

Mitre link : CVE-2018-6857

CVE.ORG link : CVE-2018-6857

JSON object : View

Products Affected

sophos

safeguard_enterprise_client
safeguard_lan_crypt_client
safeguard_easy_device_encryption_client

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

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By crafting an input buffer we can control the execution path to the point where the constant 0x12 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."}, {"lang": "es", "value": "Sophos SafeGuard Enterprise en versiones anteriores a la 8.00.5, SafeGuard Easy en versiones anteriores a la 7.00.3, y SafeGuard LAN Crypt en versiones anteriores a la 3.95.2 son vulnerables a una escalada de privilegios local mediante IOCTL 0x802022E0. Manipulando un b\u00fafer de entrada, es posible controlar la ruta de ejecuci\u00f3n al punto en el que la constante 0x12 se escribir\u00e1 en una direcci\u00f3n controlada por el usuario. Se puede aprovechar esta situaci\u00f3n para modificar la estructura SEP_TOKEN_PRIVILEGES del objeto Token que pertenece al proceso del exploit y otorgar privilegios SE_DEBUG_NAME. Esto permite que el proceso del exploit interact\u00fae con procesos con privilegios m\u00e1s elevados que se ejecutan como SYSTEM, ejecutando c\u00f3digo en su contexto de seguridad."}], "lastModified": "2024-11-21T04:11:18.330", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:6.00:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2F57138C-7C06-496F-994E-0966CE8212C0"}, {"criteria": "cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:6.10:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C35D6EE3-06A4-4720-A41F-A853CBF5AD31"}, {"criteria": "cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:7.00:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3EC3A868-4328-4C39-9846-8E1182E747CB"}, {"criteria": "cpe:2.3:a:sophos:safeguard_enterprise_client:5.60.3:vs-nfd:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1831A4DA-2F50-411A-924F-FF0E15A593A0"}, {"criteria": "cpe:2.3:a:sophos:safeguard_enterprise_client:6.00:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7D8F90D7-7D25-418F-AE85-AD1D7E60DD18"}, {"criteria": "cpe:2.3:a:sophos:safeguard_enterprise_client:6.00.1:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "864E1982-8947-4EF7-912D-CDFD74E8D134"}, {"criteria": "cpe:2.3:a:sophos:safeguard_enterprise_client:6.10:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "60BBA33F-853D-407B-975B-A9182B259DB9"}, {"criteria": "cpe:2.3:a:sophos:safeguard_enterprise_client:7.00:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "88E54DC4-12A5-452F-8DCE-890645585097"}, {"criteria": "cpe:2.3:a:sophos:safeguard_enterprise_client:8.00:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3075C40D-1FF9-46D0-80F3-2EF8E8423974"}, {"criteria": "cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.90.1:ts:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4BCE0FAF-54C0-420D-BA05-F90848408515"}, {"criteria": "cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.90.2:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4CD621BA-6AB7-427D-B6D0-D2D75D1ADC18"}, {"criteria": "cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.95.1:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C82A7CD5-0703-47E1-BA4F-3797986CE139"}, {"criteria": "cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.95.1:ts:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2D0F50CA-6C19-4ECF-97B7-6636A2756961"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}

7.8 /10