CVE-2017-5567
6.7 · MEDIUMOverview
CVE-2017-5567 is a medium-severity vulnerability affecting avast free_antivirus. It was published on March 21, 2017 and has a CVSS 3.0 base score of 6.7 (MEDIUM).
This vulnerability has a CVSS 3.0 base score of 6.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
Code injection vulnerability in Avast Premier 12.3 (and earlier), Internet Security 12.3 (and earlier), Pro Antivirus 12.3 (and earlier), and Free Antivirus 12.3 (and earlier) allows a local attacker to bypass a self-protection mechanism, inject arbitrary code, and take full control of any Avast process via a "DoubleAgent" attack. One perspective on this issue is that (1) these products do not use the Protected Processes feature, and therefore an attacker can enter an arbitrary Application Verifier Provider DLL under Image File Execution Options in the registry; (2) the self-protection mechanism is intended to block all local processes (regardless of privileges) from modifying Image File Execution Options for these products; and (3) this mechanism can be bypassed by an attacker who temporarily renames Image File Execution Options during the attack.
Remediation
Check the references section for vendor advisories and patches from avast. Update free_antivirus to the latest patched version. 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.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| avast | free_antivirus | 0 | Affected |
| avast | internet_security | 0 | Affected |
| avast | premier | 0 | Affected |
| avast | pro_antivirus | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2017-5567?
CVE-2017-5567 is a medium-severity vulnerability affecting avast free_antivirus. It was published on March 21, 2017 and has a CVSS 3.0 base score of 6.7 (MEDIUM).
How severe is CVE-2017-5567?
This vulnerability has a CVSS 3.0 base score of 6.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2017-5567?
Check the references section for vendor advisories and patches from avast. Update free_antivirus to the latest patched version. 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-2017-5567?
CyberStrike's AI-powered security agents can automatically detect CVE-2017-5567 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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