CVE-2015-7974: debian debian_linux Improper Authentication
CVSS: 7.7v3.1HighModified
AliasesUBUNTU-CVE-2015-7974DEBIAN-CVE-2015-7974
Published 26-01-2016Last modified 06-08-2024
Vulnerability summary
CVE-2015-7974 is a high (CVSS 7.7) Improper Authentication vulnerability in debian debian_linux. EPSS estimates a 5.66% chance of exploitation in the next 30 days, higher than 92.8% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.7/10
010
High · v3.1 (NVD)EPSS score
5.66%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 14 · Related 10Timeline
- 26-01-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
NTP 4.x before 4.2.8p6 and 4.3.x before 4.3.90 do not verify peer associations of symmetric keys when authenticating packets, which might allow remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a "skeleton key."
CVSS metrics
5 scores · 3 sources · 3 versionsHigh 7.7Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated7.7HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
- OSV · DebianEcosystem advisory · calculated7.7HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
Medium 6.3Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:NSourcesSingle source
Medium 4.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:S/C:N/I:P/A:NSourcesSingle source
EPSS trend
Probability
5.66%
Chance of exploitation in the next 30 days
Percentile
93%
Versus all other CVEs
30-day change
0.00 pp
From 5.66% on 18-09-2026
18-09-202618-10-2026
EPSS score5.66%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (talosintel.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian2 products
- ntp< 1:4.2.8p7+dfsg-1
- debian_linuxEOL8.0 | 9.0
Netapp2 products
Ntp1 product
- ntp≥ 4.2.0, < 4.2.8 | ≥ 4.3.0, < 4.3.90 | 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
Ubuntu1 product
- ntp< 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10 | < 1:4.2.8p4+dfsg-3ubuntu5.3
4 vendors · 6 products
References
19 links
- h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03766en_usX Refsource CONFIRMThird Party Advisory
- h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03750en_usX Refsource CONFIRMThird Party Advisory
Show all 19 references
- security.freebsd.org/advisories/FreeBSD-SA-16:09.ntp.ascVendor AdvisoryX Refsource FREEBSDThird Party Advisory
us-cert.cisa.gov/ics/advisories/icsa-21-103-11X Refsource MISCThird Party AdvisoryUS Government Resource