CVE-2015-8138
NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to bypass the origin timestamp validation via a packet with an origin timestamp set to zero.
Does this matter?
Lower severity and a low EPSS score (6.25%). Track it; it rarely justifies an emergency change on its own.
Description
NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to bypass the origin timestamp validation via a packet with an origin timestamp set to zero.
- CVSS 3.0
- 5.3 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 6.25% probability · 94th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- ntp/ntp
- Source
- cve@mitre.org
EPSS 6.3% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177507.htmlThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176434.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00059.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00060.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-0063.htmlThird Party Advisory
- http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_SecurityVendor Advisory
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160127-ntpdThird Party Advisory
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-ntpdThird Party Advisory
- http://www.debian.org/security/2016/dsa-3629Third Party Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://www.securityfocus.com/bid/81811Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1034782Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-3096-1Third Party Advisory
- https://bto.bluecoat.com/security-advisory/sa113Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03750en_us
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03766en_us
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.asc
- https://security.gentoo.org/glsa/201607-15Third Party Advisory
- https://security.netapp.com/advisory/ntap-20171004-0002/
- https://security.netapp.com/advisory/ntap-20171031-0001/
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161123-ntpdThird Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.