Description
In Avast Premium Security 19.8.2393, attackers can send a specially crafted request to the local web server run by Avast Antivirus on port 27275 to support Bank Mode functionality. A flaw in the processing of a command allows execution of arbitrary OS commands with the privileges of the currently logged in user. This allows for example attackers who compromised a browser extension to escape from the browser sandbox.
References (1)
Core 1
Core References
Exploit, Third Party Advisory x_refsource_misc
https://palant.de/2020/01/13/pwning-avast-secure-browser-for-fun-and-profit/
Scores
CVSS v3
7.8
EPSS
0.0178
EPSS Percentile
75.4%
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-78
Status
published
Products (1)
avast/premium_security
19.8.2393
Published
Jan 13, 2020
Tracked Since
Feb 18, 2026