CVE-2018-17156

Name: CVE-2018-17156
Creator: NVD / NIST
Published: 2018-11-28T16:29:00.483+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.63%

Last modified Jun 17, 2026

CVE-2018-17156 is a vulnerability of currently unknown severity. In FreeBSD before 11.2-STABLE(r340268) and 11.2-RELEASE-p5, due to incorrectly accounting for padding on 64-bit platforms, a buffer underwrite could occur when constructing an ICMP reply packet when using a non-standard value for the net.inet.icmp.quotelen sysctl.. EPSS estimates a 1.63% chance of exploitation in the next 30 days.

Description

In FreeBSD before 11.2-STABLE(r340268) and 11.2-RELEASE-p5, due to incorrectly accounting for padding on 64-bit platforms, a buffer underwrite could occur when constructing an ICMP reply packet when using a non-standard value for the net.inet.icmp.quotelen sysctl.

Metrics

EPSS Probability

1.63%

73.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions	Update
Freebsd	Freebsd	< 11.2	—
Freebsd	Freebsd	11.2	P5

References

http://www.securityfocus.com/bid/106052Third Party Advisory, VDB Entry
https://security.freebsd.org/advisories/FreeBSD-EN-18:13.icmp.ascExploit, Mitigation, Vendor Advisory
http://www.securityfocus.com/bid/106052Third Party Advisory, VDB Entry
https://security.freebsd.org/advisories/FreeBSD-EN-18:13.icmp.ascExploit, Mitigation, Vendor Advisory

Timeline

Published: Nov 28, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-17156?

How severe is CVE-2018-17156?

Severity scoring for CVE-2018-17156 is pending analysis. The EPSS model estimates a 1.63% probability of exploitation in the next 30 days.

How do I fix CVE-2018-17156?

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-2018-17156?

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

Scan your code now

Source: NVD / NIST