CVE-2017-8797 Null dereference in n/a
A remote attacker can cause a system-wide denial of service by sending malformed NFSv4 packets that trigger an uninitialized array index dereference.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-8797?
CVE-2017-8797 is a high-severity vulnerability in Linux kernel, published on 2 Jul 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The NFSv4 server in the Linux kernel before 4.11.3 does not properly validate the layout type when processing the NFSv4 pNFS GETDEVICEINFO or LAYOUTGET operand in a UDP packet from a remote attacker. This type value is uninitialized upon encountering certain error conditions. This value is used as an array index for dereferencing, which leads to an OOPS and eventually a DoS of knfsd and a soft-lockup of the whole system.
Weakness: CWE-129
Which versions are affected by CVE-2017-8797?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2017-8797?
Apply the vendor's patch.
Is CVE-2017-8797 being exploited?
There is no known exploitation of CVE-2017-8797 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2017-8797, GHSA-c5mc-v7p9-x5g6, UBUNTU-CVE-2017-8797.