Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2015-5219

21
FAUCET Score

CVE-2015-5219 describes a denial-of-service vulnerability in the ULOGTOD function of SNTP before version 4.2.7p366, affecting numerous distributions including Canonical, Debian, Fedora, and Red Hat. This high-severity flaw (CVSS 7.5) allows remote attackers to trigger an infinite loop via a crafted NTP packet due to improper type conversions, requiring no user interaction or authentication. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
21CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:*
22CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*
23CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*
11CPE matchmatch criteria
cpe:2.3:a:suse:linux_enterprise_debuginfo:11:sp2:*:*:*:*:*:*
11CPE matchmatch criteria
cpe:2.3:a:suse:linux_enterprise_debuginfo:11:sp3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.84%
Probability of exploitation in next 30 days
EPSS Percentile
92.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0584 is in the 87th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: ntp-0:4.2.6p5-10.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: ntp-0:4.2.6p5-25.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: ntp

Vendor Advisories (1)

redhatCVE-2015-5219Low

ntp: infinite loop in sntp processing crafted packet

Aug 25, 2015

References

aix.software.ibm.com / aix/efixes/security/ntp_advisory4.asc
Third Party Advisory
bk1.ntp.org / ntp-dev
Issue TrackingPatchThird Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2015-November/170926.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2015-October/169167.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2015-September/166992.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-05/msg00048.html
Broken Link
lists.opensuse.org / opensuse-updates/2016-12/msg00153.html
Broken Link
rhn.redhat.com / errata/RHSA-2016-0780.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2016-2583.html
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue Tracking
cert-portal.siemens.com / productcert/pdf/ssa-497656.pdf
Third Party Advisory
github.com / ntp-project/ntp/commit/5f295cd05c3c136d39f5b3e500a2d781bdbb59c8
Issue TrackingPatchThird Party Advisory
us-cert.cisa.gov / ics/advisories/icsa-21-103-11
Third Party AdvisoryUS Government Resource
www-01.ibm.com / support/docview.wss
Third Party Advisory
www-01.ibm.com / support/docview.wss
Third Party Advisory
www-01.ibm.com / support/docview.wss
Third Party Advisory
www-01.ibm.com / support/docview.wss
Third Party Advisory
www-01.ibm.com / support/docview.wss
Third Party Advisory
ibm.com / support/home/docdisplay
Third Party Advisory
debian.org / security/2015/dsa-3388
Third Party Advisory
openwall.com / lists/oss-security/2015/08/25/3
Mailing ListPatchThird Party Advisory
oracle.com / technetwork/topics/security/linuxbulletinapr2016-2952096.html
Third Party Advisory
securityfocus.com / bid/76473
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2783-1
Third Party Advisory