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Fencer Vulns
medium 4.4

CVE-2020-15025 json

ntpd in ntp 4.2.8 before 4.2.8p15 and 4.3.x before 4.3.101 allows remote attackers to cause a denial of service (memory consumption) by sen…

published 2020-06-24 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-7153

cvss
4.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.1%
EPSS 3.1% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

ntpd in ntp 4.2.8 before 4.2.8p15 and 4.3.x before 4.3.101 allows remote attackers to cause a denial of service (memory consumption) by sending packets, because memory is not freed in situations where a CMAC key is used and associated with a CMAC algorithm in the ntp.keys file.

Patch / fix

  • ntp ntp 4.3.101
  • ntp Debian 11 1:4.2.8p15-1

debian advisories DEBIAN-CVE-2020-15025

  • ntp SLES for SAP 15, SLES 15-LTSS, SLE Module for Legacy 15 SP2 +1 more 4.2.8p15-4.10.1
  • ntp SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +12 more 4.2.8p15-88.1
  • ntp SLES 11 SP4-LTSS 4.2.8p15-64.16.1

suse advisories SUSE-SU-2020:1823-1SUSE-SU-2020:14415-1SUSE-SU-2020:1805-1

  • ntp openSUSE Tumbleweed 4.2.8p15-7.2
  • ntp openSUSE Leap 15.2 4.2.8p15-lp152.3.3.1
  • ntp openSUSE Leap 15.1 4.2.8p15-lp151.2.3.1

opensuse advisories openSUSE-SU-2024:11102-1openSUSE-SU-2020:1007-1openSUSE-SU-2020:0934-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-15025 updated cvss 4.4

ntp: Resource exhaustion via memory leak with CMAC keys

  • Red Hat Enterprise Linux 5 ntp Red Hat Enterprise Linux 6 ntp, ntpdate, ntp-perl Red Hat Enterprise Linux 7 ntp, sntp, ntpdate, ntp-perl
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.14% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.4 CVSS:3.1/AC:H/AV:N/A:H/C:N/I:N/PR:H/S:U/UI:N
CNA 3.1 4.4 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:N/A:P

Classification

Weakness
  • CWE-401 Missing Release of Memory after Effective Lifetime

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.