CVE-2018-6917 Integer overflow in FreeBSD

High 7.5 Published 4 Apr 2018 Updated 17 Sep 2024

Integer overflow in FreeBSD kernel font handling allows unprivileged users to access privileged kernel memory, potentially leading to information disclosure or privilege escalation.

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-2018-6917?

CVE-2018-6917 is a high-severity vulnerability in Freebsd Freebsd, published on 4 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p9, 10.4-STABLE, 10.4-RELEASE-p8 and 10.3-RELEASE-p28, insufficient validation of user-provided font parameters can result in an integer overflow, leading to the use of arbitrary kernel memory as glyph data. Unprivileged users may be able to access privileged kernel data.

Weakness: CWE-190

Which versions are affected by CVE-2018-6917?

It affects 1 product.

Products include Freebsd Freebsd.

How do I fix CVE-2018-6917?

No fix has been published for CVE-2018-6917 yet. Limit exposure of the affected software until one is available.

Is CVE-2018-6917 being exploited?

There is no known exploitation of CVE-2018-6917 in the wild and no public exploit code.

All Freebsd Freebsd vulnerabilities

Sources

Also known as GHSA-6p38-c897-2q5f.