CVE-2017-8307

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…

published April 27, 2017

CVSS
—
EPSS
2%
Percentile
78.0
In the wild
Unconfirmed
What it is

⚠️ Avast Antivirus has a sneaky vulnerability that lets unprivileged users launch pre-defined binaries or mess with files if the self-defense feature is turned off! Think of it like a hotel where the front desk staff can hand out blank room keys to anyone who asks — without self-defense, anyone can waltz into any room they fancy! The consequences are significant; an attacker could execute malicious code or delete crucial files, leading to a complete Denial of Service. Imagine a hotel guest who wreaks havoc, leaving no trace behind — that’s the kind of chaos this could unleash!

Put simply

Think of it like a hotel where the front desk staff can hand out blank room keys to anyone who asks — without self-defense, anyone can waltz into any room they fancy! This vulnerability arises from how the LPC interface API in AvastSVC.exe allows file manipulation without proper authorization, particularly when self-defense is disabled or in conjunction with another CVE. This lets anyone take control of the system if they can access the service.

What to do

The consequences are significant; an attacker could execute malicious code or delete crucial files, leading to a complete Denial of Service. Imagine a hotel guest who wreaks havoc, leaving no trace behind — that’s the kind of chaos this could unleash! To mitigate this vulnerability, ensure Avast Self-Defense is enabled at all times. Additionally, consider updating to a version beyond 17, if available, to patch this issue and review user permissions carefully. Regular audits can help spot potential misconfigurations! You've got this! With these steps, you can keep your system safe and sound. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01781 · 78.0th percentile
Published
2017-04-27T20:00Z
EPSS history
Timeline
  • 27 APR 20:00Z
    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…
    cvelistv5