critical
CVE-2018-12327
ntp: Stack-based buffer overflow in ntpq and ntpdc allows denial of service or code execution
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.
Severity by source
NVD9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat7.0CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Trivy's own label is CRITICAL. Rated critical by NVD, Photon OS. Rated lower by Red Hat (low), Amazon (low), Oracle (low), Ubuntu (low).
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.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| Photon OS 1.0 | ntp | 4.2.8p12-1.ph1 |
| Photon OS 2.0 | ntp | 4.2.8p12-1.ph2 |
| amazon linux 1 | ntp, ntp-debuginfo, ntp-doc and 2 more | 4.2.8p12-1.39.amzn1 |
| amazon linux 2 | ntp, ntp-debuginfo, ntp-doc and 3 more | 4.2.6p5-29.amzn2.0.1 |
| debian 11 | ntp | no fix listed |
| Oracle Linux 6 | ntp, ntp-doc, ntp-perl and 1 more | 4.2.6p5-15.0.1.el6_10 |
| Oracle Linux 7 | ntp, ntp-doc, ntp-perl and 2 more | 4.2.6p5-29.0.1.el7 |
| ubuntu 14.04-ESM | ntp | 1:4.2.6.p5+dfsg-3ubuntu2.14.04.13+esm1 |
| ubuntu 16.04 | ntp | 1:4.2.8p4+dfsg-3ubuntu5.10 |
| ubuntu 16.04-ESM | ntp | 1:4.2.8p4+dfsg-3ubuntu5.10 |
| ubuntu 18.04-ESM | ntp | 1:4.2.8p10+dfsg-5ubuntu7.3+esm1 |
Show all 27 entries from 11 sources
| Source | Package | Fixed in |
|---|---|---|
| Photon OS 1.0 | ntp | 4.2.8p12-1.ph1 |
| Photon OS 2.0 | ntp | 4.2.8p12-1.ph2 |
| amazon linux 1 | ntp | 4.2.8p12-1.39.amzn1 |
| amazon linux 1 | ntp-debuginfo | 4.2.8p12-1.39.amzn1 |
| amazon linux 1 | ntp-doc | 4.2.8p12-1.39.amzn1 |
| amazon linux 1 | ntp-perl | 4.2.8p12-1.39.amzn1 |
| amazon linux 1 | ntpdate | 4.2.8p12-1.39.amzn1 |
| amazon linux 2 | ntp | 4.2.6p5-29.amzn2.0.1 |
| amazon linux 2 | ntp-debuginfo | 4.2.6p5-29.amzn2.0.1 |
| amazon linux 2 | ntp-doc | 4.2.6p5-29.amzn2.0.1 |
| amazon linux 2 | ntp-perl | 4.2.6p5-29.amzn2.0.1 |
| amazon linux 2 | ntpdate | 4.2.6p5-29.amzn2.0.1 |
| amazon linux 2 | sntp | 4.2.6p5-29.amzn2.0.1 |
| debian 11 | ntp | no fix listed |
| Oracle Linux 6 | ntp | 4.2.6p5-15.0.1.el6_10 |
| Oracle Linux 6 | ntp-doc | 4.2.6p5-15.0.1.el6_10 |
| Oracle Linux 6 | ntp-perl | 4.2.6p5-15.0.1.el6_10 |
| Oracle Linux 6 | ntpdate | 4.2.6p5-15.0.1.el6_10 |
| Oracle Linux 7 | ntp | 4.2.6p5-29.0.1.el7 |
| Oracle Linux 7 | ntp-doc | 4.2.6p5-29.0.1.el7 |
| Oracle Linux 7 | ntp-perl | 4.2.6p5-29.0.1.el7 |
| Oracle Linux 7 | ntpdate | 4.2.6p5-29.0.1.el7 |
| Oracle Linux 7 | sntp | 4.2.6p5-29.0.1.el7 |
| ubuntu 14.04-ESM | ntp | 1:4.2.6.p5+dfsg-3ubuntu2.14.04.13+esm1 |
| ubuntu 16.04 | ntp | 1:4.2.8p4+dfsg-3ubuntu5.10 |
| ubuntu 16.04-ESM | ntp | 1:4.2.8p4+dfsg-3ubuntu5.10 |
| ubuntu 18.04-ESM | ntp | 1:4.2.8p10+dfsg-5ubuntu7.3+esm1 |
References
- http://www.securityfocus.com/bid/104517
- https://access.redhat.com/errata/RHSA-2018:3853
- https://access.redhat.com/errata/RHSA-2018:3854
- https://access.redhat.com/errata/RHSA-2019:2077
- https://access.redhat.com/security/cve/CVE-2018-12327
- https://gist.github.com/fakhrizulkifli/9b58ed8e0354e8deee50b0eebd1c011f
- https://linux.oracle.com/cve/CVE-2018-12327.html
- https://linux.oracle.com/errata/ELSA-2019-2077.html
All 16 references
- https://nvd.nist.gov/vuln/detail/CVE-2018-12327
- https://security.gentoo.org/glsa/201903-15
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us
- https://ubuntu.com/security/notices/USN-4229-1
- https://ubuntu.com/security/notices/USN-4229-2
- https://usn.ubuntu.com/4229-1/
- https://www.cve.org/CVERecord?id=CVE-2018-12327
- https://www.exploit-db.com/exploits/44909/