CVE-2019-11644

In the F-Secure installer in F-Secure SAFE for Windows before 17.6, F-Secure Internet Security before 17.6, F-Secure Anti-Virus before 17.6, F-Secure Client Security Standard and Premium before 14.10, F-Secure PSB Workstation Security before 12.01, and F-Secure Computer Protection Standard and Premium before 19.3, a local user can escalate their privileges through a DLL hijacking attack against the installer. The installer writes the file rm.exe to C:\Windows\Temp and then executes it. The rm.exe process then attempts to load several DLLs from its current directory. Non-admin users are able to write to this folder, so an attacker can create a malicious C:\Windows\Temp\OLEACC.dll file. When an admin runs the installer, rm.exe will execute the attacker's DLL in an elevated security context.

CVSS v3.0 7.8 HIGH
CVSS v2.0 6.8 MEDIUM

7.8^/10

CVSS v3.0 : HIGH

V3 Legend

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

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:P

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.f-secure.com/en/web/labs_global/fsc-2019-2	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:f-secure:computer_protection:::::standard:::*
	cpe:2.3:a:f-secure:client_security:::::premium:::*
	cpe:2.3:a:f-secure:computer_protection:::::premium:::*
	cpe:2.3:a:f-secure:internet_security::::::::
	cpe:2.3:a:f-secure:safe::::::windows::*
	cpe:2.3:a:f-secure:psb_workstation_security::::::::
	cpe:2.3:a:f-secure:client_security:::::standard:::*

Information

Published : 2019-05-17 14:29

Updated : 2020-08-24 10:37

NVD link : CVE-2019-11644

Mitre link : CVE-2019-11644

JSON object : View

CWE

CWE-427

Uncontrolled Search Path Element

Products Affected

f-secure

client_security
safe
computer_protection
internet_security
psb_workstation_security

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://www.f-secure.com/en/web/labs_global/fsc-2019-2", "name": "https://www.f-secure.com/en/web/labs_global/fsc-2019-2", "tags": ["Vendor Advisory"], "refsource": "CONFIRM"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "In the F-Secure installer in F-Secure SAFE for Windows before 17.6, F-Secure Internet Security before 17.6, F-Secure Anti-Virus before 17.6, F-Secure Client Security Standard and Premium before 14.10, F-Secure PSB Workstation Security before 12.01, and F-Secure Computer Protection Standard and Premium before 19.3, a local user can escalate their privileges through a DLL hijacking attack against the installer. The installer writes the file rm.exe to C:\\Windows\\Temp and then executes it. The rm.exe process then attempts to load several DLLs from its current directory. Non-admin users are able to write to this folder, so an attacker can create a malicious C:\\Windows\\Temp\\OLEACC.dll file. When an admin runs the installer, rm.exe will execute the attacker's DLL in an elevated security context."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-427"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2019-11644", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 6.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}}, "publishedDate": "2019-05-17T21:29Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:f-secure:computer_protection:*:*:*:*:standard:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "19.3"}, {"cpe23Uri": "cpe:2.3:a:f-secure:client_security:*:*:*:*:premium:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "14.10"}, {"cpe23Uri": "cpe:2.3:a:f-secure:computer_protection:*:*:*:*:premium:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "19.3"}, {"cpe23Uri": "cpe:2.3:a:f-secure:internet_security:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "17.6"}, {"cpe23Uri": "cpe:2.3:a:f-secure:safe:*:*:*:*:*:windows:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "17.6"}, {"cpe23Uri": "cpe:2.3:a:f-secure:psb_workstation_security:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "12.01"}, {"cpe23Uri": "cpe:2.3:a:f-secure:client_security:*:*:*:*:standard:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "14.10"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2020-08-24T17:37Z"}

7.8 /10