CVE-2016-7426: canonical ubuntu_linux Uncontrolled Resource Consumption
CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2016-7426DEBIAN-CVE-2016-7426
Published 13-01-2017Last modified 06-08-2024
Vulnerability summary
CVE-2016-7426 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in canonical ubuntu_linux. EPSS estimates a 12.37% chance of exploitation in the next 30 days, higher than 96.1% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
12.37%
0%100%
Medium · -0.10 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 8 · Related 6Timeline
- 13-01-2017PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 3 sources · 3 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.3Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LSourcesSingle source
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
12.37%
Chance of exploitation in the next 30 days
Percentile
96%
Versus all other CVEs
30-day change
-0.10 pp
From 12.47% on 18-09-2026
18-09-202618-10-2026
EPSS score12.37%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Redhat6 products
- enterprise_linux_desktop6.0 | 7.0
- enterprise_linux_server6.0 | 7.0
- enterprise_linux_server_aus7.3 | 7.4 | 7.6 | 7.7
- enterprise_linux_server_eus7.3 | 7.4 | 7.5 | 7.6 | 7.7
- enterprise_linux_server_tus7.3 | 7.6 | 7.7
Canonical1 product
- ubuntu_linuxEOL12.04
Debian1 product
- ntp< 1:4.2.8p9+dfsg-1
Hpe1 product
- hpux-ntp≥ b.11.31, < c.4.2.8.2.0
Ntp1 product
- ntp≥ 4.2.6, < 4.2.8 | ≥ 4.3.0, < 4.3.94 | 4.2.5:p203 | 4.2.5:p204 | 4.2.5:p205 | 4.2.5:p206 | 4.2.5:p207 | 4.2.5:p208 | 4.2.5:p209 | 4.2.5:p210 | 4.2.5:p211 | 4.2.5:p212 | 4.2.5:p213 | 4.2.5:p214 | 4.2.5:p215 | 4.2.5:p216 | 4.2.5:p217 | 4.2.5:p218 | 4.2.5:p219 | 4.2.5:p220 | 4.2.5:p221 | 4.2.5:p222 | 4.2.5:p223 | 4.2.5:p224 | 4.2.5:p225 | 4.2.5:p226 | 4.2.5:p227 | 4.2.5:p228 | 4.2.5:p229 | 4.2.5:p230 | 4.2.5:p231_rc1 | 4.2.5:p232_rc1 | 4.2.5:p233_rc1 | 4.2.5:p234_rc1 | 4.2.5:p235_rc1 | 4.2.5:p236_rc1 | 4.2.5:p237_rc1 | 4.2.5:p238_rc1 | 4.2.5:p239_rc1 | 4.2.5:p240_rc1 | 4.2.5:p241_rc1 | 4.2.5:p242_rc1 | 4.2.5:p243_rc1 | 4.2.5:p244_rc1 | 4.2.5:p245_rc1 | 4.2.5:p246_rc1 | 4.2.5:p247_rc1 | 4.2.5:p248_rc1 | 4.2.5:p249_rc1 | 4.2.5:p250_rc1 | 4.2.8 | 4.2.8:p1 | 4.2.8:p1-beta1 | 4.2.8:p1-beta2 | 4.2.8:p1-beta3 | 4.2.8:p1-beta4 | 4.2.8:p1-beta5 | 4.2.8:p1-rc1 | 4.2.8:p1-rc2 | 4.2.8:p2 | 4.2.8:p2-rc1 | 4.2.8:p2-rc2 | 4.2.8:p2-rc3 | 4.2.8:p3 | 4.2.8:p3-rc1 | 4.2.8:p3-rc2 | 4.2.8:p3-rc3 | 4.2.8:p4 | 4.2.8:p5 | 4.2.8:p6 | 4.2.8:p7 | 4.2.8:p8
Ubuntu1 product
- ntp< 1:4.2.6.p5+dfsg-3ubuntu2.14.04.11 | < 1:4.2.8p4+dfsg-3ubuntu5.5
6 vendors · 11 products
References
16 links- h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_usX Refsource CONFIRMThird Party Advisory
- security.freebsd.org/advisories/FreeBSD-SA-16:39.ntp.ascVendor AdvisoryX Refsource FREEBSDThird Party Advisory
