CVE-2018-17977 Denial of service in n/a
Local attackers with root access can cause system hang and memory consumption via crafted XFRM Netlink messages in the Linux kernel.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-17977?
CVE-2018-17977 is a medium-severity denial of service vulnerability in Linux kernel, published on 8 Oct 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The Linux kernel 4.14.67 mishandles certain interaction among XFRM Netlink messages, IPPROTO_AH packets, and IPPROTO_IP packets, which allows local users to cause a denial of service (memory consumption and system hang) by leveraging root access to execute crafted applications, as demonstrated on CentOS 7.
Weakness: CWE-400
Which versions are affected by CVE-2018-17977?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2018-17977?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2018-17977 being exploited?
There is no known exploitation of CVE-2018-17977 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2018-17977, GHSA-7889-v87r-4q9r, ROOT-OS-DEBIAN-12-CVE-2018-17977, ROOT-OS-DEBIAN-13-CVE-2018-17977, ROOT-OS-UBUNTU-2204-CVE-2018-17977, ROOT-OS-UBUNTU-2404-CVE-2018-17977 and 1 more.