CVE-2016-4998 Information disclosure in n/a
Local attackers with container root access can trigger an out-of-bounds read in the Linux kernel netfilter subsystem, potentially exposing sensitive kernel memory or causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-4998?
CVE-2016-4998 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 3 Jul 2016. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The IPT_SO_SET_REPLACE setsockopt implementation in the netfilter subsystem in the Linux kernel before 4.6 allows local users to cause a denial of service (out-of-bounds read) or possibly obtain sensitive information from kernel heap memory by leveraging in-container root access to provide a crafted offset value that leads to crossing a ruleset blob boundary.
Weakness: CWE-119
Which versions are affected by CVE-2016-4998?
It affects 3 products.
Products include Canonical Ubuntu Linux, Linux kernel, Oracle Linux.
How do I fix CVE-2016-4998?
Apply the vendor's patch.
Is CVE-2016-4998 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-4998 exists.
Public exploit code: 1 Metasploit module.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2016-4998, GHSA-j87m-7c2j-m929, UBUNTU-CVE-2016-4998.