CVE-2015-7979 in the critical feed json
NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to cause a denial of service (client-server association tear down) by se…
published 2017-01-30 9 y ago modified 2026-06-17 4 mo ago also EUVD-2015-7876
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 11.9%
- EPSS 11.9% chance of exploitation in 30 days, percentile 96%
- public exploits
- 0
- none known
Summary
NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to cause a denial of service (client-server association tear down) by sending broadcast packets with invalid authentication to a broadcast client.
Patch / fix
- ntp Debian 11 1:4.2.8p7+dfsg-1
debian advisories DEBIAN-CVE-2015-7979
- ntp Ubuntu 14.04 LTS 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10
- ntp Ubuntu 16.04 LTS 1:4.2.8p4+dfsg-3ubuntu5.3
ubuntu advisories UBUNTU-CVE-2015-7979
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- ntp RHEL 6 4.2.6p5-10.el6.1
- ntp RHEL 7 4.2.6p5-22.el7_2.2
- sntp RHEL 7 4.2.6p5-22.el7_2.2
- ntpdate RHEL 6 4.2.6p5-10.el6.1
- ntpdate RHEL 7 4.2.6p5-22.el7_2.2
- ntp-perl RHEL 6 4.2.6p5-10.el6.1
- ntp-perl RHEL 7 4.2.6p5-22.el7_2.2
- ntp RHEL 7 4.2.6p5-25.el7
red hat advisories RHSA-2016:1552RHSA-2016:1141RHSA-2016:2583
- ntp SLES 11 SP3-TERADATA, SLES 11 SP3-LTSS, SLES 11 SP2-LTSS +3 more 4.2.8p6-41.1
- ntp SLES for SAP 12, SLES 12, SLED 12 4.2.8p6-46.5.2
- yast2-ntp-client SLES for SAP 12, SLES 12, SLED 12 +1 more 3.1.12.4-8.2
- ntp SLES 12 SP1, SLES 11 SP4, SLED 12 SP1 +2 more 4.2.8p6-8.2
- yast2-ntp-client SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 +1 more 3.1.22-6.2
- yast2-ntp-client SLES 11 SP2-LTSS 2.17.14.1-1.12.1
suse advisories SUSE-SU-2016:1311-1SUSE-SU-2016:1247-1SUSE-SU-2016:1175-1SUSE-SU-2016:1177-1
- ntp openSUSE Tumbleweed 4.2.8p9-1.1
opensuse advisories openSUSE-SU-2024:10181-1
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2015-7979 updated cvss 5.8
ntp: off-path denial of service on authenticated broadcast mode
-
Red Hat Enterprise Linux 5 ntpaffected: workaround, no fix planned “Do not use NTP's broadcast mode by not configuring the "broadcast" directive in the ntp.conf file.”
-
Red Hat Enterprise Linux Client (v. 7) ntp 4.2.6p5-25.el7, ntp 4.2.6p5-22.el7_2.2, ntpdate 4.2.6p5-25.el7, ntpdate 4.2.6p5-22.el7_2.2 Red Hat Enterprise Linux Client Optional (v. 7) sntp 4.2.6p5-25.el7, ntp-perl 4.2.6p5-25.el7, sntp 4.2.6p5-22.el7_2.2, ntp-perl 4.2.6p5-22.el7_2.2 Red Hat Enterprise Linux ComputeNode (v. 7) ntp 4.2.6p5-25.el7, ntp 4.2.6p5-22.el7_2.2, ntpdate 4.2.6p5-25.el7, ntpdate 4.2.6p5-22.el7_2.2 Red Hat Enterprise Linux ComputeNode Optional (v. 7) sntp 4.2.6p5-25.el7, ntp-perl 4.2.6p5-25.el7, sntp 4.2.6p5-22.el7_2.2, ntp-perl 4.2.6p5-22.el7_2.2 Red Hat Enterprise Linux Desktop (v. 6) ntp 4.2.6p5-10.el6.1, ntpdate 4.2.6p5-10.el6.1 Red Hat Enterprise Linux Desktop Optional (v. 6) ntp-perl 4.2.6p5-10.el6.1fixed: vendor fix “Do not use NTP's broadcast mode by not configuring the "broadcast" directive in the ntp.conf file.” RHSA-2016:1141
+1 more productsfewer
Red Hat Enterprise Linux HPC Node (v. 6) ntp 4.2.6p5-10.el6.1, ntpdate 4.2.6p5-10.el6.1 -
Red Hat Enterprise Linux HPC Node EUS (v. 6.7) ntp 4.2.6p5-5.el6_7.5, ntpdate 4.2.6p5-5.el6_7.5fixed: vendor fix “Do not use NTP's broadcast mode by not configuring the "broadcast" directive in the ntp.conf file.” RHSA-2016:1552
-
Red Hat Enterprise Linux HPC Node Optional (v. 6) ntp-perl 4.2.6p5-10.el6.1fixed: vendor fix “Do not use NTP's broadcast mode by not configuring the "broadcast" directive in the ntp.conf file.” RHSA-2016:1141
-
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) ntp-perl 4.2.6p5-5.el6_7.5fixed: vendor fix “Do not use NTP's broadcast mode by not configuring the "broadcast" directive in the ntp.conf file.” RHSA-2016:1552
-
Red Hat Enterprise Linux Server (v. 6) ntp 4.2.6p5-10.el6.1, ntpdate 4.2.6p5-10.el6.1 Red Hat Enterprise Linux Server (v. 7) ntp 4.2.6p5-25.el7, ntp 4.2.6p5-22.el7_2.2, ntpdate 4.2.6p5-25.el7, ntpdate 4.2.6p5-22.el7_2.2fixed: vendor fix “Do not use NTP's broadcast mode by not configuring the "broadcast" directive in the ntp.conf file.” RHSA-2016:1141
-
Red Hat Enterprise Linux Server EUS (v. 6.7) ntp 4.2.6p5-5.el6_7.5, ntpdate 4.2.6p5-5.el6_7.5fixed: vendor fix “Do not use NTP's broadcast mode by not configuring the "broadcast" directive in the ntp.conf file.” RHSA-2016:1552
-
Red Hat Enterprise Linux Server Optional (v. 6) ntp-perl 4.2.6p5-10.el6.1 Red Hat Enterprise Linux Server Optional (v. 7) sntp 4.2.6p5-25.el7, ntp-perl 4.2.6p5-25.el7, sntp 4.2.6p5-22.el7_2.2, ntp-perl 4.2.6p5-22.el7_2.2fixed: vendor fix “Do not use NTP's broadcast mode by not configuring the "broadcast" directive in the ntp.conf file.” RHSA-2016:1141
show 2 moreshow fewer
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Red Hat Enterprise Linux Server Optional EUS (v. 6.7) ntp-perl 4.2.6p5-5.el6_7.5fixed: vendor fix “Do not use NTP's broadcast mode by not configuring the "broadcast" directive in the ntp.conf file.” RHSA-2016:1552
-
Red Hat Enterprise Linux Workstation (v. 6) ntp 4.2.6p5-10.el6.1, ntpdate 4.2.6p5-10.el6.1 Red Hat Enterprise Linux Workstation (v. 7) ntp 4.2.6p5-25.el7, ntp 4.2.6p5-22.el7_2.2, ntpdate 4.2.6p5-25.el7, ntpdate 4.2.6p5-22.el7_2.2 Red Hat Enterprise Linux Workstation Optional (v. 6) ntp-perl 4.2.6p5-10.el6.1 Red Hat Enterprise Linux Workstation Optional (v. 7) sntp 4.2.6p5-25.el7, ntp-perl 4.2.6p5-25.el7, sntp 4.2.6p5-22.el7_2.2, ntp-perl 4.2.6p5-22.el7_2.2fixed: vendor fix “Do not use NTP's broadcast mode by not configuring the "broadcast" directive in the ntp.conf file.” RHSA-2016:1141
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
cisa ICSA-21-103-11 updated cvss 7.5
Siemens TIM 4R-IE Devices
-
Siemens SIPLUS NET TIM 4R-IE (6AG1800-4BA00-7AA0) Siemens SIPLUS NET TIM 4R-IE DNP3 (6AG1803-4BA00-7AA0) Siemens TIM 4R-IE (6NH7800-4BA00) Siemens TIM 4R-IE DNP3 (6NH7803-4BA00-0AA0)affected: workaround, no fix planned
Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf
Exploit prediction
11.89% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-19 Data Processing Errors
References
-
tools.cisco.com
/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpd
vendor-advisory, third-party-advisory
-
ubuntu.com
/usn/USN-3096-1
vendor-advisory, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2016-04/msg00060.html
vendor-advisory, third-party-advisory
-
debian.org
/security/2016/dsa-3629
vendor-advisory, third-party-advisory
-
access.redhat.com
/errata/RHSA-2016:1141
vendor-advisory, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2016-07/msg00026.html
vendor-advisory, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2016-05/msg00038.html
vendor-advisory, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2016-05/msg00020.html
vendor-advisory, third-party-advisory
-
rhn.redhat.com
/errata/RHSA-2016-1552.html
vendor-advisory, third-party-advisory
-
lists.fedoraproject.org
/pipermail/package-announce/2016-January/176434.html
vendor-advisory, third-party-advisory
-
rhn.redhat.com
/errata/RHSA-2016-2583.html
vendor-advisory
-
lists.opensuse.org
/opensuse-security-announce/2016-05/msg00048.html
vendor-advisory, third-party-advisory
-
lists.fedoraproject.org
/pipermail/package-announce/2016-February/177507.html
vendor-advisory, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2016-08/msg00042.html
vendor-advisory, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2016-04/msg00059.html
vendor-advisory, third-party-advisory
-
security.freebsd.org
/advisories/FreeBSD-SA-16:09.ntp.asc
vendor-advisory
-
lists.opensuse.org
/opensuse-updates/2016-05/msg00114.html
vendor-advisory, third-party-advisory
-
security.gentoo.org
/glsa/201607-15
vendor-advisory, third-party-advisory
-
support.ntp.org
/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Security
vendor-advisory
- h20566.www2.hpe.com /hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03766en_us
- oracle.com /technetwork/topics/security/linuxbulletinapr2016-2952096.html
-
securitytracker.com
/id/1034782
vdb-entry, third-party-advisory
-
kb.cert.org
/vuls/id/718152
third-party-advisory, us-government-resource
- h20566.www2.hpe.com /hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03750en_us
- security.netapp.com /advisory/ntap-20171031-0001/
-
securityfocus.com
/bid/81816
vdb-entry, third-party-advisory
-
bto.bluecoat.com
/security-advisory/sa113
third-party-advisory
- cert-portal.siemens.com /productcert/pdf/ssa-497656.pdf
- us-cert.cisa.gov /ics/advisories/icsa-21-103-11
Sources
- CVE List CVE-2015-7979
- NVD CVE-2015-7979
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.