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CVE-2019-11396

7.8 · HIGH

An issue was discovered in Avira Free Security Suite 10.

Published Aug 29, 2019CWE-59EPSS 0.57%

Overview

CVE-2019-11396 is a high-severity vulnerability. It was published on August 29, 2019 and has a CVSS 3.0 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

An issue was discovered in Avira Free Security Suite 10. The permissive access rights on the SoftwareUpdater folder (files / folders and configuration) are incompatible with the privileged file manipulation performed by the product. Files can be created that can be used by an unprivileged user to obtain SYSTEM privileges. Arbitrary file creation can be achieved by abusing the SwuConfig.json file creation: an unprivileged user can replace these files by pseudo-symbolic links to arbitrary files. When an update occurs, a privileged service creates a file and sets its access rights, offering write access to the Everyone group in any directory.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refpacketstormsecurity.com/files/153868/Avira-Free-Security-Suite-2019-Software-Updater-2.0.6.13175-Improper-Access-Control.htmlRefmedium.com/sidechannel-br/vulnerabilidade-no-avira-security-suite-pode-levar-%C3%A0-escala%C3%A7%C3%A3o-de-privil%C3%A9gios-no-windows-71964236c077Refseclists.org/fulldisclosure/2019/Aug/1Refpacketstormsecurity.com/files/153868/Avira-Free-Security-Suite-2019-Software-Updater-2.0.6.13175-Improper-Access-Control.htmlRefmedium.com/sidechannel-br/vulnerabilidade-no-avira-security-suite-pode-levar-%C3%A0-escala%C3%A7%C3%A3o-de-privil%C3%A9gios-no-windows-71964236c077Refseclists.org/fulldisclosure/2019/Aug/1

How CyberStrike helps

Frequently asked questions

What is CVE-2019-11396?

CVE-2019-11396 is a high-severity vulnerability. It was published on August 29, 2019 and has a CVSS 3.0 base score of 7.8 (HIGH).

How severe is CVE-2019-11396?

This vulnerability has a CVSS 3.0 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2019-11396?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-11396?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-11396 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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