CVE-2020-9320: Malicious File Upload

Published Feb 20, 2020
·
Updated

DISPUTED Avira AV Engine before 8.3.54.138 allows virus-detection bypass via a crafted ISO archive. This affects versions before 8.3.54.138 of Antivirus for Endpoint, Antivirus for Small Business, Exchange Security (Gateway), Internet Security Suite for Windows, Prime, Free Security Suite for Windows, and Cross Platform Anti-malware SDK. NOTE: Vendor asserts that vulnerability does not exist in product.

Affected Software

8 affected components
Avira Anti-malware SDK<8.3.54.138
Avira Antivirus Server<8.3.54.138
Avira Avira Antivirus For Endpoint<8.3.54.138
Avira Avira Antivirus For Small Business<8.3.54.138
Avira Avira Exchange Security<8.3.54.138
Avira Avira Free Security Suite Windows<8.3.54.138
Avira Avira Internet Security Suite Windows<8.3.54.138
Avira Avira Prime<8.3.54.138

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Avira Antivirus for Endpoint to a version that resolves this vulnerability.

    Fixed in 8.3.54.138
  2. Upgrade

    Upgrade Avira Antivirus for Small Business to a version that resolves this vulnerability.

    Fixed in 8.3.54.138
  3. Upgrade

    Upgrade Avira Exchange Security (Gateway) to a version that resolves this vulnerability.

    Fixed in 8.3.54.138
  4. Upgrade

    Upgrade Avira Internet Security Suite for Windows to a version that resolves this vulnerability.

    Fixed in 8.3.54.138
  5. Upgrade

    Upgrade Avira Prime to a version that resolves this vulnerability.

    Fixed in 8.3.54.138
  6. Upgrade

    Upgrade Avira Free Security Suite for Windows to a version that resolves this vulnerability.

    Fixed in 8.3.54.138
  7. Upgrade

    Upgrade Avira Cross Platform Anti-malware SDK to a version that resolves this vulnerability.

    Fixed in 8.3.54.138

Event History

Feb 20, 2020
CVE Published
via MITRE·09:39 PM
Data Sourced
via MITRE·09:39 PM
Description
Disputed
10:15 PM
Data Sourced
via NVD·10:15 PM
DescriptionSeverityWeaknessAffected Software
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the vulnerability ID for this Avira AV Engine vulnerability?

The vulnerability ID for this Avira AV Engine vulnerability is CVE-2020-9320.

2

Which versions of Avira AV Engine are affected by this vulnerability?

Versions before 8.3.54.138 of Antivirus for Endpoint, Antivirus for Small Business, Exchange Security (Gateway), Internet Security Suite for Windows, Prime, Free Security Suite are affected by this vulnerability.

3

How severe is CVE-2020-9320?

CVE-2020-9320 has a severity rating of 5.5 (medium).

4

How can the virus-detection bypass be achieved in this vulnerability?

The virus-detection bypass can be achieved by using a crafted ISO archive.

5

Is there a fix available for CVE-2020-9320?

Yes, the fix for CVE-2020-9320 is to update Avira AV Engine to version 8.3.54.138 or later.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203