CVE-2019-17093

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in Avast antivirus before 19.8 and AVG antivirus before 19.8. A DLL Preloading vulnerability allows an attacker to implant %WINDIR%\system32\wbemcomn.dll, which is loaded into a protected-light process (PPL) and might bypass some of the self-defense mechanisms. This affects all components that use WMI, e.g., AVGSvc.exe 19.6.4546.0 and TuneupSmartScan.dll 19.1.884.0.

Se detectó un problema en Avast antivirus versiones anteriores a 19.8 y AVG antivirus versiones anteriores a 19.8. Una vulnerabilidad de Precarga de DLL permite a un atacante implantar una biblioteca %WINDIR%\system32\wbemcomn.dll, que se carga en un proceso protected-light (PPL) y puede omitir algunos de los mecanismos de autodefensa. Esto afecta a todos los componentes que usan WMI, por ejemplo, AVGSvc.exe versión 19.6.4546.0 y TuneupSmartScan.dll versión 19.1.884.0.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-10-02 CVE Reserved
2019-10-23 CVE Published
2023-05-20 EPSS Updated
2024-08-05 CVE Updated
2024-08-05 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-427: Uncontrolled Search Path Element

CAPEC

References (2)

URL	Tag	Source
https://safebreach.com/blog	Third Party Advisory

URL	Date	SRC
https://safebreach.com/Post/Avast-Antivirus-AVG-Antivirus-DLL-Preloading-into-PPL-and-Potential-Abuses	2024-08-05

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Avast Search vendor "Avast"		Antivirus Search vendor "Avast" for product "Antivirus"				< 19.8 Search vendor "Avast" for product "Antivirus" and version " < 19.8"		-		Affected
Avg Search vendor "Avg"		Anti-virus Search vendor "Avg" for product "Anti-virus"				< 19.8 Search vendor "Avg" for product "Anti-virus" and version " < 19.8"		-		Affected