Skip to content
Noroxi
NVD / CVE Program· CNA mitre

CVE-2020-15025: 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 send

Noroxi assessment

Priority: Monitor (action score 20/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 3.1% (FIRST EPSS); higher than 87.9% of all records.
  • Anyone who can reach it over the internet can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: ntp (Debian:11) 1:4.2.8p15-1; ntp (openSUSE:Leap 15.1) 4.2.8p15-lp151.2.3.1; ntp (openSUSE:Leap 15.2) 4.2.8p15-lp152.3.3.1.

Low priority for now. Upgrade to ntp (Debian:11) 1:4.2.8p15-1; ntp (openSUSE:Leap 15.1) 4.2.8p15-lp151.2.3.1; ntp (openSUSE:Leap 15.2) 4.2.8p15-lp152.3.3.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 4.9 · v3.1—No exploit Fix available
Published
Jun 24, 2020
Updated
Jun 16, 2026
EPSS
3.1% · 87th percentile

Report tools

JSON

Action score

20

Monitor

Low priority for now.

CVSS
19 / 40 · 4.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 3.1%

CNA vs NVD score

NVD
4.9
CNA · mitre
4.4
0.5 point gap

CVSS:3.1/AC:H/AV:N/A:H/C:N/I:N/PR:H/S:U/UI:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2020-15025

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for ntp records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
ntpntp
opensuseleap
netappcloud backup
netappsteelstore cloud integrated storage
netapp8300 firmware
netapp8300
netapp8700 firmware
netapp8700
netappa400 firmware
netappa400
netapph410c firmware
netapph410c

and 15 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • netapp 8300 firmwareall versions
  • netapp 8700 firmwareall versions
  • netapp a400 firmwareall versions
  • netapp cloud backupall versions
  • netapp h300e firmwareall versions
  • netapp h300s firmwareall versions
  • netapp h410c firmwareall versions
  • netapp h410s firmwareall versions
  • netapp h500e firmwareall versions
  • netapp h500s firmwareall versions
  • netapp h700e firmwareall versions
  • netapp h700s firmwareall versions
  • netapp steelstore cloud integrated storageall versions
  • ntp ntp4.3.97 and later · before 4.3.101
  • ntp ntp4.2.8
  • opensuse leap15.1
  • opensuse leap15.2
  • oracle zfs storage appliance kit8.8

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:11ntpbefore 1:4.2.8p15-11:4.2.8p15-1
openSUSE:Leap 15.1ntpbefore 4.2.8p15-lp151.2.3.14.2.8p15-lp151.2.3.1
openSUSE:Leap 15.2ntpbefore 4.2.8p15-lp152.3.3.14.2.8p15-lp152.3.3.1
openSUSE:Tumbleweedntpbefore 4.2.8p15-7.24.2.8p15-7.2
SUSE:HPE Helion OpenStack 8ntpbefore 4.2.8p15-88.14.2.8p15-88.1
SUSE:Linux Enterprise Module for Legacy 15 SP1ntpbefore 4.2.8p15-4.10.14.2.8p15-4.10.1
SUSE:Linux Enterprise Server 11 SP4-LTSSntpbefore 4.2.8p15-64.16.14.2.8p15-64.16.1

Same product

ntp: all records

Other highest-scoring records for the same primary product.

  • CVE-2015-7871Crypto-NAK packets in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to bypass authentication.
    64This week
  • CVE-2014-9295Multiple stack-based buffer overflows in ntpd in NTP before 4.2.8 allow remote attackers to execute arbitrary code via a crafted packet, rel
    54Plan
  • CVE-2013-5211The monlist feature in ntp_request.c in ntpd in NTP before 4.2.7p26 allows remote attackers to cause a denial of service (traffic amplificat
    49Plan

Published before and after this one in the same product

  • ← EarlierCVE-2018-8956May 6, 2020 · ntpd in ntp 4.2.8p10, 4.2.8p11, 4.2.8p12 and 4.2.8p13 allow remote attackers to prevent a broadcast client from synchronizing its clock with
    22Monitor
  • ← EarlierCVE-2020-13817Jun 4, 2020 · ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows remote attackers to cause a denial of service (daemon exit or system time change
    30Monitor
  • Later →CVE-2023-26551Apr 11, 2023 · mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write in the cp<cpdec while loop.
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:ntp1:4.2.8p15-1 · Debian:11Package registry (OSV)
opensuse:ntp4.2.8p15-lp151.2.3.1 · openSUSE:Leap 15.1Package registry (OSV)
suse:ntp4.2.8p15-64.16.1 · SUSE:Linux Enterprise Server 11 SP4-LTSSPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-401 · Missing Release of Memory after Effective Lifetime

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records