CVE-2017-14106 Denial of service in n/a

Medium 5.5 Published Updated

Local attackers can crash the system via a divide-by-zero error in the TCP disconnect function, requiring kernel updates.

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-2017-14106?

CVE-2017-14106 is a medium-severity denial of service vulnerability in Linux kernel, published on 1 Sep 2017. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The tcp_disconnect function in net/ipv4/tcp.c in the Linux kernel before 4.12 allows local users to cause a denial of service (__tcp_select_window divide-by-zero error and system crash) by triggering a disconnect within a certain tcp_recvmsg code path.

Weakness: CWE-369

Which versions are affected by CVE-2017-14106?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2017-14106?

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-2017-14106 being exploited?

There is no known exploitation of CVE-2017-14106 in the wild and no public exploit code.

All Linux kernel vulnerabilities

Sources

Also known as DEBIAN-CVE-2017-14106, GHSA-fwvw-9m43-mj3m, UBUNTU-CVE-2017-14106, USN-3443-3.

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