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CVE-2017-8307

9.8 · CRITICAL

In Avast Antivirus before v17, using the LPC interface API exposed by the AvastSVC.exe Windows service, it is possible to launch predefined binaries, or replace or delete arbitrary files.

Published Apr 27, 2017EPSS 1.78%

Overview

CVE-2017-8307 is a critical-severity vulnerability. It was published on April 27, 2017 and has a CVSS 3.0 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.0 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In Avast Antivirus before v17, using the LPC interface API exposed by the AvastSVC.exe Windows service, it is possible to launch predefined binaries, or replace or delete arbitrary files. This vulnerability is exploitable by any unprivileged user when Avast Self-Defense is disabled. It is also exploitable in conjunction with CVE-2017-8308 when Avast Self-Defense is enabled. The vulnerability allows for Denial of Service attacks and hiding traces of a possible attack.

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

Refwww.securityfocus.com/bid/98086Refwww.trustwave.com/Resources/Security-Advisories/Advisories/Multiple-Vulnerabilities-in-Avast-Antivirus/?fid=9201Refwww.securityfocus.com/bid/98086Refwww.trustwave.com/Resources/Security-Advisories/Advisories/Multiple-Vulnerabilities-in-Avast-Antivirus/?fid=9201

How CyberStrike helps

Frequently asked questions

What is CVE-2017-8307?

CVE-2017-8307 is a critical-severity vulnerability. It was published on April 27, 2017 and has a CVSS 3.0 base score of 9.8 (CRITICAL).

How severe is CVE-2017-8307?

This vulnerability has a CVSS 3.0 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-8307?

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-2017-8307?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-8307 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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