CVE-2016-7426
HIGH
7.5
CVSS Score
Published: January 13, 2017 at 04:00 PM UTC
Updated: June 17, 2026 at 12:53 AM UTC
9 products affected across 4 vendorsUbuntu LinuxEnterprise Linux DesktopEnterprise Linux Server
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Severity
HIGH7.5
Exploit prediction
EPSS 12%
Description
NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Ubuntu Linux· Canonicalrubygems
95%b.11.31 ≤ v < c.4.2.8.2.0
Affected range stops below c.4.2.8.2.0, so it looks safe — our inference, not a vendor statement
4.2.6 ≤ v < 4.2.84.3.0 ≤ v < 4.3.944.2.5 p2034.2.5 p2044.2.5 p2054.2.5 p2064.2.5 p2074.2.5 p2084.2.5 p2094.2.5 p2104.2.5 p2114.2.5 p2124.2.5 p2134.2.5 p2144.2.5 p2154.2.5 p2164.2.5 p2174.2.5 p2184.2.5 p2194.2.5 p2204.2.5 p2214.2.5 p2224.2.5 p2234.2.5 p2244.2.5 p2254.2.5 p2264.2.5 p2274.2.5 p2284.2.5 p2294.2.5 p2304.2.5 p231_rc14.2.5 p232_rc14.2.5 p233_rc14.2.5 p234_rc14.2.5 p235_rc14.2.5 p236_rc14.2.5 p237_rc14.2.5 p238_rc14.2.5 p239_rc14.2.5 p240_rc14.2.5 p241_rc14.2.5 p242_rc14.2.5 p243_rc14.2.5 p244_rc14.2.5 p245_rc14.2.5 p246_rc14.2.5 p247_rc14.2.5 p248_rc14.2.5 p249_rc14.2.5 p250_rc14.2.84.2.8 p14.2.8 p1-beta14.2.8 p1-beta24.2.8 p1-beta34.2.8 p1-beta44.2.8 p1-beta54.2.8 p1-rc14.2.8 p1-rc24.2.8 p24.2.8 p2-rc14.2.8 p2-rc24.2.8 p2-rc34.2.8 p34.2.8 p3-rc14.2.8 p3-rc24.2.8 p3-rc34.2.8 p44.2.8 p54.2.8 p64.2.8 p74.2.8 p8
Affected range stops below 4.2.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.3.94, so it looks safe — our inference, not a vendor statement
95%
Enterprise Linux Server· Red Hatrubygems
95%95%
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (11)
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
http://rhn.redhat.com/errata/RHSA-2017-0252.htmlx_refsource_CONFIRMIssue TrackingMitigationVendor Advisory
Source: [email protected]
http://support.ntp.org/bin/view/Main/NtpBug3071x_refsource_CONFIRMRelease NotesVendor Advisory
Source: [email protected]
http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_VulnerabilitiesVDB Entryx_refsource_BIDThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/94451VDB Entryx_refsource_SECTRACKThird Party Advisory
Source: [email protected]
http://www.securitytracker.com/id/1037354x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://bto.bluecoat.com/security-advisory/sa139x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_usCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-400
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