PT-2015-6804 · Ntf+6 · Ntp+6

Miroslav Lichvar · Published 2014-12-24 · Updated 2023-02-13 · CVE-2015-5219

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions NTP versions prior to 4.2.7p366

Description The issue allows remote attackers to cause a denial of service, potentially via a crafted NTP packet. This is due to improper type conversions from a precision value to a double in the ULOGTOD function in ntp.d in SNTP. Additionally, the decodenetnum() function may cause a denial of service when encountering invalid values instead of returning FAIL.

Recommendations For versions prior to 4.2.7p366, update to version 4.2.7p366 or later to resolve the issue. As a temporary workaround, consider restricting access to the NTP service to minimize the risk of exploitation.

Exploit

Fix

DoS

Incorrect Type Conversion or Cast

Weakness Enumeration

CWE-704

Related Identifiers

ALT-PU-2014-2486

CESA-2016_0780

CESA-2016_2583

CVE-2015-5219

DLA-335-1

DSA-3388-1

MGASA-2015-0348

RHSA-2016:0780

RHSA-2016:2583

RHSA-2016_0780

RHSA-2016_2583

SUSE-SU-2016:1311-1

SUSE-SU-2016:3193-1

SUSE-SU-2016:3195-1

SUSE-SU-2016:3196-1

SUSE-SU-2017:0255-1

USN-2783-1

Affected Products

Alt Linux

Centos

Ibm Aix

Ntp

Red Hat

Suse

Ubuntu

References · 158

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/ntp/ntp_nak_to_the_future.rb · Exploit
• https://github.com/ntp-project/ntp/commit/5f295cd05c3c136d39f5b3e500a2d781bdbb59c8 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2016:1311-1 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2017:0255-1 · Vendor Advisory
• http://ubuntu.com/usn/USN-2783-1 · Vendor Advisory
• http://openwall.com/lists/oss-security/2015/08/25/3 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2015-5219 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2015-5219 · Vendor Advisory
• https://ubuntu.com/security/CVE-2015-5219 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2016-2583.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2015-7855 · Vendor Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.html · Vendor Advisory
• http://rhn.redhat.com/errata/RHSA-2016-2583.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2015-7701 · Vendor Advisory