CVE-2017-1081 Use after free in FreeBSD
A use-after-free flaw in FreeBSD's ipfilter allows remote attackers to cause a kernel panic via crafted packet fragments when stateful filtering is enabled.
- 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-2017-1081?
CVE-2017-1081 is a high-severity use after free vulnerability in Freebsd Freebsd, published on 10 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In FreeBSD before 11.0-STABLE, 11.0-RELEASE-p10, 10.3-STABLE, and 10.3-RELEASE-p19, ipfilter using "keep state" or "keep frags" options can cause a kernel panic when fed specially crafted packet fragments due to incorrect memory handling.
Which versions are affected by CVE-2017-1081?
It affects 1 product.
Products include Freebsd Freebsd.
How do I fix CVE-2017-1081?
No fix has been published for CVE-2017-1081 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2017-1081 being exploited?
There is no known exploitation of CVE-2017-1081 in the wild and no public exploit code.
Other vulnerabilities in Freebsd Freebsd
Sources
Also known as GHSA-vgpm-hvwj-9wc9.