CVE-2018-12327 Memory corruption in n/a

Critical 9.8 Published 20 Jun 2018 Updated 5 Aug 2024

Stack-based buffer overflow in NTP utilities allows attackers to execute code or escalate privileges via crafted command-line arguments.

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

What is CVE-2018-12327?

CVE-2018-12327 is a critical memory corruption vulnerability in Ntp Ntp, published on 20 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Stack-based buffer overflow in ntpq and ntpdc of NTP version 4.2.8p11 allows an attacker to achieve code execution or escalate to higher privileges via a long string as the argument for an IPv4 or IPv6 command-line parameter. NOTE: It is unclear whether there are any common situations in which ntpq or ntpdc is used with a command line from an untrusted source.

Weakness: CWE-787

Which versions are affected by CVE-2018-12327?

It affects 1 product.

Linux distribution packages (40)

`ntp` Red Hat:enterprise_linux:6::client	All versions	`0:4.2.6p5-15.el6_10`
`ntp-debuginfo` Red Hat:enterprise_linux:6::client	All versions	`0:4.2.6p5-15.el6_10`
`ntp-doc` Red Hat:enterprise_linux:6::client	All versions	`0:4.2.6p5-15.el6_10`
`ntp-perl` Red Hat:enterprise_linux:6::client	All versions	`0:4.2.6p5-15.el6_10`
`ntpdate` Red Hat:enterprise_linux:6::client	All versions	`0:4.2.6p5-15.el6_10`
`ntp` Red Hat:enterprise_linux:6::computenode	All versions	`0:4.2.6p5-15.el6_10`
`ntp-debuginfo` Red Hat:enterprise_linux:6::computenode	All versions	`0:4.2.6p5-15.el6_10`
`ntp-doc` Red Hat:enterprise_linux:6::computenode	All versions	`0:4.2.6p5-15.el6_10`
`ntp-perl` Red Hat:enterprise_linux:6::computenode	All versions	`0:4.2.6p5-15.el6_10`
`ntpdate` Red Hat:enterprise_linux:6::computenode	All versions	`0:4.2.6p5-15.el6_10`
`ntp` Red Hat:enterprise_linux:6::server	All versions	`0:4.2.6p5-15.el6_10`
`ntp-debuginfo` Red Hat:enterprise_linux:6::server	All versions	`0:4.2.6p5-15.el6_10`
`ntp-doc` Red Hat:enterprise_linux:6::server	All versions	`0:4.2.6p5-15.el6_10`
`ntp-perl` Red Hat:enterprise_linux:6::server	All versions	`0:4.2.6p5-15.el6_10`
`ntpdate` Red Hat:enterprise_linux:6::server	All versions	`0:4.2.6p5-15.el6_10`
`ntp` Red Hat:enterprise_linux:6::workstation	All versions	`0:4.2.6p5-15.el6_10`
`ntp-debuginfo` Red Hat:enterprise_linux:6::workstation	All versions	`0:4.2.6p5-15.el6_10`
`ntp-doc` Red Hat:enterprise_linux:6::workstation	All versions	`0:4.2.6p5-15.el6_10`
`ntp-perl` Red Hat:enterprise_linux:6::workstation	All versions	`0:4.2.6p5-15.el6_10`
`ntpdate` Red Hat:enterprise_linux:6::workstation	All versions	`0:4.2.6p5-15.el6_10`
`ntp` Red Hat:enterprise_linux:7::client	All versions	`0:4.2.6p5-29.el7`
`ntp-debuginfo` Red Hat:enterprise_linux:7::client	All versions	`0:4.2.6p5-29.el7`
`ntp-doc` Red Hat:enterprise_linux:7::client	All versions	`0:4.2.6p5-29.el7`
`ntp-perl` Red Hat:enterprise_linux:7::client	All versions	`0:4.2.6p5-29.el7`
`ntpdate` Red Hat:enterprise_linux:7::client	All versions	`0:4.2.6p5-29.el7`
`sntp` Red Hat:enterprise_linux:7::client	All versions	`0:4.2.6p5-29.el7`
`ntp` Red Hat:enterprise_linux:7::computenode	All versions	`0:4.2.6p5-29.el7`
`ntp-debuginfo` Red Hat:enterprise_linux:7::computenode	All versions	`0:4.2.6p5-29.el7`
`ntp-doc` Red Hat:enterprise_linux:7::computenode	All versions	`0:4.2.6p5-29.el7`
`ntp-perl` Red Hat:enterprise_linux:7::computenode	All versions	`0:4.2.6p5-29.el7`
`ntpdate` Red Hat:enterprise_linux:7::computenode	All versions	`0:4.2.6p5-29.el7`
`sntp` Red Hat:enterprise_linux:7::computenode	All versions	`0:4.2.6p5-29.el7`
`ntp` Red Hat:enterprise_linux:7::server	All versions	`0:4.2.6p5-29.el7`
`ntp-debuginfo` Red Hat:enterprise_linux:7::server	All versions	`0:4.2.6p5-29.el7`
`ntp-doc` Red Hat:enterprise_linux:7::server	All versions	`0:4.2.6p5-29.el7`
`ntp-perl` Red Hat:enterprise_linux:7::server	All versions	`0:4.2.6p5-29.el7`
`ntpdate` Red Hat:enterprise_linux:7::server	All versions	`0:4.2.6p5-29.el7`
`sntp` Red Hat:enterprise_linux:7::server	All versions	`0:4.2.6p5-29.el7`
`ntp` Red Hat:enterprise_linux:7::workstation	All versions	`0:4.2.6p5-29.el7`
`ntp-debuginfo` Red Hat:enterprise_linux:7::workstation	All versions	`0:4.2.6p5-29.el7`

Products include Ntp Ntp.

How do I fix CVE-2018-12327?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2018-12327 being exploited?

There is no known exploitation of CVE-2018-12327 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry.

All Ntp Ntp vulnerabilities

Sources

Also known as CLSA-2023-1699468766, DEBIAN-CVE-2018-12327, GHSA-gmx7-j3pp-2gxp, MGASA-2018-0371, RHSA-2018:3853, RHSA-2018:3854 and 5 more.