NTP through 4.2.8p12 has a NULL Pointer Dereference.
Noroxi assessment
Priority: Monitor (action score 32/100)
- Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
- Probability of exploitation in the next 30 days: 5.7% (FIRST EPSS); higher than 92.9% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: ntp (Debian:11) 1:4.2.8p12+dfsg-4; ntp (openSUSE:Leap 15.0) 4.2.8p13-lp150.8.1; ntp (openSUSE:Tumbleweed) 4.2.8p15-7.2.
Low priority for now. Upgrade to ntp (Debian:11) 1:4.2.8p12+dfsg-4; ntp (openSUSE:Leap 15.0) 4.2.8p13-lp150.8.1; ntp (openSUSE:Tumbleweed) 4.2.8p15-7.2 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
- Published
- May 15, 2019
- Updated
- Jun 16, 2026
- EPSS
- 5.7% · 92th percentile
- CWE
- CWE-476
Report tools
Action score
32
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 2 / 30 · 5.7%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- Proof of concept exists, no weaponized module
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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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 helpAffected 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.
| Vendor | Product | CPE |
|---|---|---|
| ntp | ntp | cpe:2.3:a:ntp:ntp |
| netapp | clustered data ontap | cpe:2.3:o:netapp:clustered_data_ontap |
| netapp | data ontap | cpe:2.3:o:netapp:data_ontap |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| opensuse | leap | cpe:2.3:o:opensuse:leap |
| hpe | hpux-ntp | cpe:2.3:a:hpe:hpux-ntp |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- fedoraproject fedora28
- fedoraproject fedora29
- fedoraproject fedora30
- hpe hpux-ntpbefore c.4.2.8.4.0
- netapp clustered data ontapbefore 9.2
- netapp data ontapall versions
- ntp ntpbefore 4.2.8
- ntp ntp4.2.8
- opensuse leap15.0
- opensuse leap42.3
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:11 | ntp | before 1:4.2.8p12+dfsg-4 | 1:4.2.8p12+dfsg-4 |
| openSUSE:Leap 15.0 | ntp | before 4.2.8p13-lp150.8.1 | 4.2.8p13-lp150.8.1 |
| openSUSE:Tumbleweed | ntp | before 4.2.8p15-7.2 | 4.2.8p15-7.2 |
| SUSE:Linux Enterprise Module for Legacy 15 | ntp | before 4.2.8p13-4.6.1 | 4.2.8p13-4.6.1 |
| SUSE:Linux Enterprise Point of Sale 11 SP3 | ntp | before 4.2.8p13-48.27.1 | 4.2.8p13-48.27.1 |
| SUSE:Linux Enterprise Server 11 SP4 | ntp | before 4.2.8p13-64.13.1 | 4.2.8p13-64.13.1 |
| SUSE:Linux Enterprise Server 12-LTSS | ntp | before 4.2.8p13-46.32.1 | 4.2.8p13-46.32.1 |
| SUSE:OpenStack Cloud 7 | ntp | before 4.2.8p13-85.1 | 4.2.8p13-85.1 |
Same product
ntp: all recordsOther 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, rel54Plan
- 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 amplificat49Plan
Published before and after this one in the same product
- ← EarlierCVE-2018-12327Jun 20, 2018 · Stack-based buffer overflow in ntpq and ntpdc of NTP version 4.2.8p11 allows an attacker to achieve code execution or escalate to higher pri47Plan
- ← EarlierCVE-2019-11331Apr 18, 2019 · Network Time Protocol (NTP), as specified in RFC 5905, uses port 123 even for modes where a fixed port number is not required, which makes i33Monitor
- Later →CVE-2014-5209Jan 7, 2020 · An Information Disclosure vulnerability exists in NTP 4.2.7p25 private (mode 6/7) messages via a GET_RESTRICT control message, which could l22Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:ntp | 1:4.2.8p12+dfsg-4 · Debian:11 | Package registry (OSV) |
| opensuse:ntp | 4.2.8p13-lp150.8.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| suse:ntp | 4.2.8p13-46.32.1 · SUSE:Linux Enterprise Server 12-LTSS | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Proof-of-concept repository on GitHub ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:0 | 2020-04-26 |
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.
- Published
- First PoC+346 d
- TodayOct 20, 2026+2715 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
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 researchersFinders, 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
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-476 · NULL Pointer DereferenceCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/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
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (13 more)Show less
- lists.opensuse.org/opensuse-security-announce/2019-04/msg00036.html
- packetstormsecurity.com/files/152915/FreeBSD-Security-Advisory-FreeBSD-SA-19-04.ntp.html
- support.ntp.org/bin/view/Main/SecurityNotice
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2NVS2CSG2TQ663CXOZZUJN4STQPMENNP/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JBGXY7OKWOLT6X6JAPVZRFEP4FLCGGST/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQDNHNYOJK2SRSGO23GQ2RXTOUY2HLNN/
- seclists.org/bugtraq/2019/May/39
- security.FreeBSD.org/advisories/FreeBSD-SA-19:04.ntp.asc
- security.gentoo.org/glsa/201903-15
- security.netapp.com/advisory/ntap-20190503-0001/
- support.f5.com/csp/article/K61363039
- support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us
- usn.ubuntu.com/4563-1/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.