Multiple vulnerabilities in ntp
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2016-7427 CVE-2016-7428 CVE-2016-7431 |
| CWE-ID | CWE-400 CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
ntp Server applications / Other server solutions |
| Vendor | ntp.org |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Resource exhaustion
EUVDB-ID: #VU39822
Risk: Low
CVSSv3.1: 3.8 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-7427
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote non-authenticated attacker to perform service disruption.
The broadcast mode replay prevention functionality in ntpd in NTP before 4.2.8p9 allows remote attackers to cause a denial of service (reject broadcast mode packets) via a crafted broadcast mode packet.
MitigationInstall update from vendor's website.
Vulnerable software versionsntp: 4.2.8
External linkshttp://nwtime.org/ntp428p9_release/
http://support.ntp.org/bin/view/Main/NtpBug3114
http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
http://www.securityfocus.com/bid/94447
http://www.securitytracker.com/id/1037354
http://bto.bluecoat.com/security-advisory/sa139
http://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
http://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc
http://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03883en_us
http://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03899en_us
http://usn.ubuntu.com/3707-2/
http://www.kb.cert.org/vuls/id/633847
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Resource exhaustion
EUVDB-ID: #VU39823
Risk: Low
CVSSv3.1: 3.8 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-7428
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote non-authenticated attacker to perform service disruption.
ntpd in NTP before 4.2.8p9 allows remote attackers to cause a denial of service (reject broadcast mode packets) via the poll interval in a broadcast packet.
MitigationInstall update from vendor's website.
Vulnerable software versionsntp: 4.2.8
External linkshttp://nwtime.org/ntp428p9_release/
http://support.ntp.org/bin/view/Main/NtpBug3113
http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
http://www.securityfocus.com/bid/94446
http://www.securitytracker.com/id/1037354
http://bto.bluecoat.com/security-advisory/sa139
http://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
http://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc
http://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03883en_us
http://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03899en_us
http://usn.ubuntu.com/3707-2/
http://www.kb.cert.org/vuls/id/633847
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Input validation error
EUVDB-ID: #VU39824
Risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-7431
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote non-authenticated attacker to manipulate data.
NTP before 4.2.8p9 allows remote attackers to bypass the origin timestamp protection mechanism via an origin timestamp of zero. NOTE: this vulnerability exists because of a CVE-2015-8138 regression.
MitigationInstall update from vendor's website.
Vulnerable software versionsntp: 4.2.8
External linkshttp://nwtime.org/ntp428p9_release/
http://support.ntp.org/bin/view/Main/NtpBug3102
http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://www.securityfocus.com/bid/94454
http://www.securitytracker.com/id/1037354
http://bto.bluecoat.com/security-advisory/sa139
http://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
http://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc
http://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03883en_us
http://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03899en_us
http://www.kb.cert.org/vuls/id/633847
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
