PT-2017-8698 · Openbsd · Openntpd

Luis M. Merino · Published 2017-01-31 · Updated 2017-02-24 · CVE-2016-5117

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions OpenNTPD versions prior to 6.0p1

Description The issue allows remote attackers to bypass man-in-the-middle mitigations via a crafted timestamp constraint with a valid certificate, as OpenNTPD does not validate the CN for HTTPS constraint requests.

Recommendations For versions prior to 6.0p1, update to version 6.0p1 or later to resolve the issue.

Fix

Weakness Enumeration

CWE-254

Related Identifiers

CVE-2016-5117

Affected Products

Openntpd

References · 8

• https://osv.dev/vulnerability/CVE-2016-5117 · Vendor Advisory
• http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.sbin/ntpd/constraint.c.diff?r1=1.27&r2=1.28 · Patch
• https://security-tracker.debian.org/tracker/CVE-2016-5117 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2016-5117 · Security Note
• http://openntpd.org/txt/release-6.0p1.txt · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2016-5117 · Vendor Advisory
• http://openwall.com/lists/oss-security/2016/05/23/2 · Note
• http://openwall.com/lists/oss-security/2016/05/29/6 · Note