CVE-2015-7705
The rate limiting feature in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to have unspecified impact via a large number of crafted requests.
02 Description
The rate limiting feature in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to have unspecified impact via a large number of crafted requests.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 12.15% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 96.0% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2017-08-07 20:00Z9 YR AGO
- Last updated
- 2024-08-06 07:58Z2 YR AGO
- Reserved
- 2015-10-04
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-20Improper Input ValidationClass
- Data version
- 5.1
- Document digest
- 0628b4fb9038cac5f853b1832f70c3d4b33c9605dd54ecf5d893c2cdce10e871
05 Affected products
06 References
- lists.opensuse.orgSUSE-SU-2016:1912http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
- www.kb.cert.orgVU#718152https://www.kb.cert.org/vuls/id/718152
- www.ubuntu.comUSN-2783-1http://www.ubuntu.com/usn/USN-2783-1
- lists.opensuse.orgSUSE-SU-2016:1247http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html
- www.securityfocus.com77284http://www.securityfocus.com/bid/77284
- support.citrix.comhttps://support.citrix.com/article/CTX220112
- www.securitytracker.com1033951http://www.securitytracker.com/id/1033951
- support.ntp.orghttp://support.ntp.org/bin/view/Main/SecurityNotice#October_2015_NTP_4_2_8p4_Securit
- lists.opensuse.orgSUSE-SU-2016:1311http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html
- www.cs.bu.eduhttps://www.cs.bu.edu/~goldbe/NTPattack.html
- lists.opensuse.orgSUSE-SU-2016:2094http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
- eprint.iacr.orghttps://eprint.iacr.org/2015/1020.pdf
- h20566.www2.hpe.comhttps://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05270839
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1274184
- support.ntp.orghttp://support.ntp.org/bin/view/Main/NtpBug2901
- lists.opensuse.orgopenSUSE-SU-2016:1423http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html
- security.gentoo.orgGLSA-201607-15https://security.gentoo.org/glsa/201607-15
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20171004-0001/
- packetstormsecurity.comhttp://packetstormsecurity.com/files/134137/Slackware-Security-Advisory-ntp-Updates.html
- lists.opensuse.orgopenSUSE-SU-2016:1329http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00052.html
- tools.cisco.com20151021 Multiple Vulnerabilities in ntpd Affecting Cisco Products - October 2015http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151021-ntp
- lists.opensuse.orgSUSE-SU-2016:1471http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00001.html
- bto.bluecoat.comhttps://bto.bluecoat.com/security-advisory/sa103
- lists.opensuse.orgSUSE-SU-2016:1291http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00037.html
- lists.opensuse.orgSUSE-SU-2016:1568http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html
- lists.opensuse.orgopenSUSE-SU-2015:2016http://lists.opensuse.org/opensuse-updates/2015-11/msg00093.html
- lists.opensuse.orgSUSE-SU-2016:1278http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00034.html
- www.securityfocus.com20151029 [slackware-security] ntp (SSA:2015-302-03)http://www.securityfocus.com/archive/1/536796/100/0/threaded
- www.securityfocus.com20151029 [slackware-security] ntp (SSA:2015-302-03)http://www.securityfocus.com/archive/1/archive/1/536796/100/100/threaded
- www.securityfocus.com20151022 Cisco Security Advisory: Multiple Vulnerabilities in ntpd Affecting Cisco Products - October 2015http://www.securityfocus.com/archive/1/536737/100/0/threaded
- www.securityfocus.com20151022 Cisco Security Advisory: Multiple Vulnerabilities in ntpd Affecting Cisco Products - October 2015http://www.securityfocus.com/archive/1/archive/1/536737/100/100/threaded
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
- us-cert.cisa.govhttps://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
- us-cert.cisa.govhttps://us-cert.cisa.gov/ics/advisories/icsa-21-159-11
- www.arista.comhttps://www.arista.com/en/support/advisories-notices/security-advisories/1212-security-advisory-0016
07 Fixed in
Debian 11
- ntp Fixed in 1:4.2.8p4+dfsg-3
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- ntp Fixed in 1:4.2.6.p5+dfsg-3ubuntu2.14.04.5
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.