CVE-2018-6856

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 0x8020601C. 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 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-2018-6856

Mitre link : CVE-2018-6856

CVE.ORG link : CVE-2018-6856

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

{"id": "CVE-2018-6856", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.2, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "acInsufInfo": true, "impactScore": 10.0, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV30": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2018-07-09T18:29:00.950", "references": [{"url": "http://seclists.org/fulldisclosure/2018/Jul/20", "tags": ["Mailing List", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://community.sophos.com/kb/en-us/131934", "tags": ["Patch", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities/", "tags": ["Exploit", "Technical Description", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "http://seclists.org/fulldisclosure/2018/Jul/20", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://community.sophos.com/kb/en-us/131934", "tags": ["Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities/", "tags": ["Exploit", "Technical Description", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-119"}]}], "descriptions": [{"lang": "en", "value": "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 0x8020601C. 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."}, {"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 0x8020601C. Manipulando un b\u00fafer de entrada, es posible controlar la ruta de ejecuci\u00f3n al puntero, en el que se escribir\u00e1 una variable global en una direcci\u00f3n controlada por el usuario. Se puede aprovechar esta situaci\u00f3n para eliminar el puntero al descriptor de seguridad en la cabecera del objeto de un proceso privilegiado o modificar el descriptor de seguridad en s\u00ed para ejecutar c\u00f3digo en el contexto de un proceso que se est\u00e1 ejecutando como SYSTEM."}], "lastModified": "2024-11-21T04:11:18.187", "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