CVE-2018-17156 Memory corruption in FreeBSD
A buffer underwrite in FreeBSD's ICMP reply construction allows attackers to cause memory corruption or denial of service when a non-standard sysctl value is set.
- 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-2018-17156?
CVE-2018-17156 is a medium-severity memory corruption vulnerability in Freebsd Freebsd, published on 28 Nov 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In FreeBSD before 11.2-STABLE(r340268) and 11.2-RELEASE-p5, due to incorrectly accounting for padding on 64-bit platforms, a buffer underwrite could occur when constructing an ICMP reply packet when using a non-standard value for the net.inet.icmp.quotelen sysctl.
Weakness: CWE-787
Which versions are affected by CVE-2018-17156?
It affects 1 product.
Products include Freebsd Freebsd.
How do I fix CVE-2018-17156?
No fix has been published for CVE-2018-17156 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2018-17156 being exploited?
There is no known exploitation of CVE-2018-17156 in the wild and no public exploit code.
Other vulnerabilities in Freebsd Freebsd
Sources
Also known as GHSA-w9jj-wr83-9pp3.