Vulnerability Details

AVG Antivirus (All Editions) < 19.8 DLL Preloading Vulnerability (Windows)

Published: 2019-11-01 13:51:54
CVE Author: NIST National Vulnerability Database

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

Detection Type:
Windows Registry

Solution Type:
Vendor Patch

Summary:
This host is running AVG Antivirus and is prone to a dll preloading vulnerability.

Detection Method:
Checks if a vulnerable version is present on the target host.

Technical Details:
The vulnerability gives attackers the ability to: - load and execute malicious payloads using multiple signed services, within the context of Avast signed processes - bypass the part of the self-defense mechanism that should prevent an attacker from tampering with processes and files of Avast Antivirus and load an arbitrary DLL into the Antivirus process - load and execute malicious payloads in a persistent way, each time the services are loaded.

Impact:
The vulnerability can be used to achieve self-defense bypass, defense evasion, persistence and privilege escalation.

Affected Versions:
All Editions of AVG Antivirus before version 19.8.

Recommendations:
Update to AVG Antivirus version 19.8 or later.

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2019-17093

CVE Analysis

https://www.mageni.net/cve/CVE-2019-17093

References:

https://safebreach.com/Post/Avast-Antivirus-AVG-Antivirus-DLL-Preloading-into-PPL-and-Potential-Abuses

Severity
Low
CVSS Score
3.5
Published
2019-11-01
Modified
2019-11-01
Category
General

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