CVE-2017-8307 Missing authorization in n/a
Unprivileged users can launch binaries or modify files via the Avast service API when Self-Defense is disabled, enabling DoS or evidence tampering.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-8307?
CVE-2017-8307 is a critical missing authorization vulnerability in n/a, published on 27 Apr 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2017-8307?
It affects 1 product.
Products include Avast Antivirus.
How do I fix CVE-2017-8307?
No fix has been published for CVE-2017-8307 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2017-8307 being exploited?
There is no known exploitation of CVE-2017-8307 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2025-13032 Race condition in (Free/Inernet Security/Ultimate) Antivirus
- CVE-2020-10867 Security feature bypass in n/a
- CVE-2025-3500 Integer Overflow in Avast Antiviurs 25.1.981.6 on Windows may result in privilege escalation
- CVE-2021-45335 Missing authorization in n/a
- CVE-2021-45336 Privilege escalation vulnerability in the Sandbox component of Avast Antivirus prior to 20.4 allows a local sandboxed code to gain elevated
Sources
Also known as GHSA-7gqh-6434-f3jx.