What is CVE-2019-18894?

CVE-2019-18894 is a high-severity vulnerability in Avast Premium Security, classified under OS Command Injection. CVSS score: 7.8/10. Published 2020-01-13.

How severe is CVE-2019-18894?

High severity. CVSS v3 base score is 7.8 out of 10.

RCE in Avast Premium Security

CVE-2019-18894

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.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.018 (75.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Avast Premium_security — versions 19.8.2393
N/a — versions n/a

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2019-18894?: CVE-2019-18894 is a high-severity vulnerability in Avast Premium Security, classified under OS Command Injection. CVSS score: 7.8/10. Published 2020-01-13.
How severe is CVE-2019-18894?: High severity. CVSS v3 base score is 7.8 out of 10.