SB2019110508 - Multiple vulnerabilities in Avast Antivirus

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Main Vulnerability Database SB2019110508

SB2019110508 - Multiple vulnerabilities in Avast Antivirus

Published: November 5, 2019

Security Bulletin ID SB2019110508
Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Cross-site scripting (CVE-ID: CVE-2019-18653)

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists in the Network Notification Popup due to insufficient sanitization of user-supplied data passed via an SSID Name. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.


2) Link following (CVE-ID: CVE-2019-11230)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to the . A local authenticated administrator can replace the "LogsUpdate.log" file with a symlink, trick the product into renaming arbitrary files and cause a denial of service on the target system.

This defect can be exploited to rename a critical product file (e.g., AvastSvc.exe), causing the product to fail to start on the next system restart.

Remediation

Install update from vendor's website.

References