CVE-2018-14622 Null dereference in libtirpc

Medium 5.3 Published 30 Aug 2018 Updated 5 Aug 2024

A remote attacker can crash RPC-based applications by exhausting file descriptors, causing a null-pointer dereference in libtirpc.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2018-14622?

CVE-2018-14622 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 30 Aug 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A null-pointer dereference vulnerability was found in libtirpc before version 0.3.3-rc3. The return value of makefd_xprt() was not checked in all instances, which could lead to a crash when the server exhausted the maximum number of available file descriptors. A remote attacker could cause an rpc-based application to crash by flooding it with new connections.

Weakness: CWE-252

Which versions are affected by CVE-2018-14622?

It affects 8 products.

Linux distribution packages (12)

`libtirpc` Red Hat:enterprise_linux:7::client	All versions	`0:0.2.4-0.10.el7`
`libtirpc-debuginfo` Red Hat:enterprise_linux:7::client	All versions	`0:0.2.4-0.10.el7`
`libtirpc-devel` Red Hat:enterprise_linux:7::client	All versions	`0:0.2.4-0.10.el7`
`libtirpc` Red Hat:enterprise_linux:7::computenode	All versions	`0:0.2.4-0.10.el7`
`libtirpc-debuginfo` Red Hat:enterprise_linux:7::computenode	All versions	`0:0.2.4-0.10.el7`
`libtirpc-devel` Red Hat:enterprise_linux:7::computenode	All versions	`0:0.2.4-0.10.el7`
`libtirpc` Red Hat:enterprise_linux:7::server	All versions	`0:0.2.4-0.10.el7`
`libtirpc-debuginfo` Red Hat:enterprise_linux:7::server	All versions	`0:0.2.4-0.10.el7`
`libtirpc-devel` Red Hat:enterprise_linux:7::server	All versions	`0:0.2.4-0.10.el7`
`libtirpc` Red Hat:enterprise_linux:7::workstation	All versions	`0:0.2.4-0.10.el7`
`libtirpc-debuginfo` Red Hat:enterprise_linux:7::workstation	All versions	`0:0.2.4-0.10.el7`
`libtirpc-devel` Red Hat:enterprise_linux:7::workstation	All versions	`0:0.2.4-0.10.el7`

Products include Canonical Ubuntu Linux, Debian Debian Linux, Libtirpc Project Libtirpc, Redhat Enterprise Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server Aus and 2 more.

How do I fix CVE-2018-14622?

Upgrade to a fixed version.

Is CVE-2018-14622 being exploited?

There is no known exploitation of CVE-2018-14622 in the wild and no public exploit code.

All Canonical Ubuntu Linux vulnerabilities

Sources

Also known as CVE-2015-9265, DEBIAN-CVE-2018-14622, DLA-1487-1, GHSA-359h-vjp2-hp47, RHBA-2017:1991, UBUNTU-CVE-2018-14622.