CVE-2017-17450 Missing authorization in n/a
Local users can bypass access restrictions to modify OS fingerprinting data due to missing capability checks in the Linux kernel netfilter module.
- 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-2017-17450?
CVE-2017-17450 is a high-severity missing authorization vulnerability in Linux kernel, published on 7 Dec 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
net/netfilter/xt_osf.c in the Linux kernel through 4.14.4 does not require the CAP_NET_ADMIN capability for add_callback and remove_callback operations, which allows local users to bypass intended access restrictions because the xt_osf_fingers data structure is shared across all net namespaces.
Weakness: CWE-862
Which versions are affected by CVE-2017-17450?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2017-17450?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2017-17450 being exploited?
There is no known exploitation of CVE-2017-17450 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2017-17450, GHSA-5wr7-vvgp-w64f, UBUNTU-CVE-2017-17450.