#VU22526 Link following in Avast Antivirus - CVE-2019-11230


Vulnerability identifier: #VU22526

Vulnerability risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-11230

CWE-ID: CWE-59

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Avast Antivirus
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor: Avast Software s.r.o.

Description

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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Avast Antivirus: 12.1.2272 - 2016.11.1.2262

External links
https://www.mcerlane.co.uk/CVE-2019-11230/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability


Multiple vulnerabilities in Avast Antivirus