CVE-2019-17093
HIGHAvast and AVG Antivirus < 19.8 - DLL Preloading in Protected Process Light
Title source: llmDescription
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.
References (2)
Core 2
Core References
Third Party Advisory x_refsource_misc
https://safebreach.com/blog
Exploit, Technical Description, Third Party Advisory x_refsource_misc
https://safebreach.com/Post/Avast-Antivirus-AVG-Antivirus-DLL-Preloading-into-PPL-and-Potential-Abuses
Scores
CVSS v3
7.8
EPSS
0.0057
EPSS Percentile
42.6%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Details
CWE
CWE-427
Status
published
Products (2)
avast/antivirus
< 19.8
avg/anti-virus
< 19.8
Published
Oct 23, 2019
Tracked Since
Feb 18, 2026