CVE-2018-16228

Name: CVE-2018-16228
Creator: NVD / NIST
Published: 2019-10-03T16:15:12.443+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.74%

Last modified Jun 17, 2026

CVE-2018-16228 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The HNCP parser in tcpdump before 4.9.3 has a buffer over-read in print-hncp.c:print_prefix().. EPSS estimates a 3.74% chance of exploitation in the next 30 days.

Description

The HNCP parser in tcpdump before 4.9.3 has a buffer over-read in print-hncp.c:print_prefix().

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

3.74%

88.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Tcpdump	Tcpdump	< 4.9.3
Apple	Mac Os X	< 10.15.2
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Fedoraproject	Fedora	29
Fedoraproject	Fedora	30
Fedoraproject	Fedora	31
Opensuse	Leap	15.0
Opensuse	Leap	15.1
Redhat	Enterprise Linux	7.0
Redhat	Enterprise Linux	8.0

References

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00050.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00053.htmlThird Party Advisory
http://seclists.org/fulldisclosure/2019/Dec/26Mailing List, Third Party Advisory
https://github.com/the-tcpdump-group/tcpdump/blob/tcpdump-4.9/CHANGESRelease Notes, Third Party Advisory
https://github.com/the-tcpdump-group/tcpdump/commit/83a412a5275cac973c5841eca3511c766bed778dPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/10/msg00015.htmlThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62XY42U6HY3H2APR5EHNWCZ7SAQNMMJN/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNYXF3IY2X65IOD422SA6EQUULSGW7FN/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R2UDPOSGVJQIYC33SQBXMDXHH4QDSDMU/
https://seclists.org/bugtraq/2019/Dec/23Mailing List, Third Party Advisory
https://seclists.org/bugtraq/2019/Oct/28Mailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20200120-0001/
https://support.apple.com/kb/HT210788Third Party Advisory
https://usn.ubuntu.com/4252-1/
https://usn.ubuntu.com/4252-2/
https://www.debian.org/security/2019/dsa-4547Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00050.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00053.htmlThird Party Advisory
http://seclists.org/fulldisclosure/2019/Dec/26Mailing List, Third Party Advisory
https://github.com/the-tcpdump-group/tcpdump/blob/tcpdump-4.9/CHANGESRelease Notes, Third Party Advisory
https://github.com/the-tcpdump-group/tcpdump/commit/83a412a5275cac973c5841eca3511c766bed778dPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/10/msg00015.htmlThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62XY42U6HY3H2APR5EHNWCZ7SAQNMMJN/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNYXF3IY2X65IOD422SA6EQUULSGW7FN/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R2UDPOSGVJQIYC33SQBXMDXHH4QDSDMU/
https://seclists.org/bugtraq/2019/Dec/23Mailing List, Third Party Advisory
https://seclists.org/bugtraq/2019/Oct/28Mailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20200120-0001/
https://support.apple.com/kb/HT210788Third Party Advisory
https://usn.ubuntu.com/4252-1/
https://usn.ubuntu.com/4252-2/
https://www.debian.org/security/2019/dsa-4547Third Party Advisory

Timeline

Published: Oct 3, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-16228?

The HNCP parser in tcpdump before 4.9.3 has a buffer over-read in print-hncp.c:print_prefix().

How severe is CVE-2018-16228?

CVE-2018-16228 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.74% probability of exploitation in the next 30 days.

How do I fix CVE-2018-16228?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-16228?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST