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CVE-2019-3844· NVD / CVE Program· CNA redhat

It was discovered that a systemd service that uses DynamicUser property can get new privileges through the execution of SUID binaries, which

Noroxi assessment

Priority: Monitor (action score 31/100)

  • Public proof-of-concept code exists (Exploit-DB); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.91% (FIRST EPSS); higher than 59.4% of all records.
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: systemd (Debian:12) 242-4; systemd (openSUSE:Tumbleweed) 249.4-2.2; systemd (Red Hat:enterprise_linux:8::baseos) 0:239-29.el8.
  • Severity is disputed: the assigning authority (CNA) scores it 4.5, NVD 7.8.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to systemd (Debian:12) 242-4; systemd (openSUSE:Tumbleweed) 249.4-2.2; systemd (Red Hat:enterprise_linux:8::baseos) 0:239-29.el8 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

It was discovered that a systemd service that uses DynamicUser property can get new privileges through the execution of SUID binaries, which would allow to create binaries owned by the service transient group with the setgid bit set. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the GID will be recycled.

HighCVSS 7.8 · v3.1—Proof of concept Fix available
Published
Apr 26, 2019
Updated
Jun 16, 2026
EPSS
0.9% · 59th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.9%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.8
CNA · redhat
4.5
3.3 point gap

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

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
  • 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.

Follow CVE-2019-3844

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

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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.

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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
systemd projectsystemd
canonicalubuntu linux
netapphci management node
netappsnapprotect
netappsolidfire
netappcn1610 firmware
netappcn1610

Affected versions

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

  • canonical ubuntu linux16.04
  • canonical ubuntu linux18.04
  • canonical ubuntu linux19.10
  • netapp cn1610 firmwareall versions
  • netapp hci management nodeall versions
  • netapp snapprotectall versions
  • netapp solidfireall versions
  • systemd project systemdbefore 242

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • [freedesktop.org] systemd

    • 242affected

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12systemdbefore 242-4242-4
openSUSE:Tumbleweedsystemdbefore 249.4-2.2249.4-2.2
Red Hat:enterprise_linux:8::baseossystemdbefore 0:239-29.el80:239-29.el8
Red Hat:enterprise_linux:8::baseossystemd-containerbefore 0:239-29.el80:239-29.el8
Red Hat:enterprise_linux:8::baseossystemd-container-debuginfobefore 0:239-29.el80:239-29.el8
Red Hat:enterprise_linux:8::baseossystemd-debuginfobefore 0:239-29.el80:239-29.el8
Red Hat:enterprise_linux:8::baseossystemd-debugsourcebefore 0:239-29.el80:239-29.el8
Red Hat:enterprise_linux:8::baseossystemd-develbefore 0:239-29.el80:239-29.el8
Red Hat:enterprise_linux:8::baseossystemd-journal-remotebefore 0:239-29.el80:239-29.el8
Red Hat:enterprise_linux:8::baseossystemd-journal-remote-debuginfobefore 0:239-29.el80:239-29.el8
Red Hat:enterprise_linux:8::baseossystemd-libsbefore 0:239-29.el80:239-29.el8
Red Hat:enterprise_linux:8::baseossystemd-libs-debuginfobefore 0:239-29.el80:239-29.el8
Red Hat:enterprise_linux:8::baseossystemd-pambefore 0:239-29.el80:239-29.el8
Red Hat:enterprise_linux:8::baseossystemd-pam-debuginfobefore 0:239-29.el80:239-29.el8
Red Hat:enterprise_linux:8::baseossystemd-testsbefore 0:239-29.el80:239-29.el8
Red Hat:enterprise_linux:8::baseossystemd-tests-debuginfobefore 0:239-29.el80:239-29.el8
Red Hat:enterprise_linux:8::baseossystemd-udevbefore 0:239-29.el80:239-29.el8
Red Hat:enterprise_linux:8::baseossystemd-udev-debuginfobefore 0:239-29.el80:239-29.el8
SUSE:Linux Enterprise Module for Basesystem 15systemdbefore 234-24.30.1234-24.30.1

Same product

systemd project: all records

Other highest-scoring records for the same primary product.

  • CVE-2017-9445In systemd through 233, certain sizes passed to dns_packet_new in systemd-resolved can cause it to allocate a buffer that's too small.
    46Plan
  • CVE-2018-21029systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Over TLS.
    40Plan
  • CVE-2015-7510Stack-based buffer overflow in the getpwnam and getgrnam functions of the NSS module nss-mymachines in systemd.
    40Plan
  • CVE-2017-1000082systemd v233 and earlier fails to safely parse usernames starting with a numeric digit (e.g.
    40Plan
  • CVE-2022-2526A use-after-free vulnerability was found in systemd.
    39Monitor
  • CVE-2017-15908In systemd 223 through 235, a remote DNS server can respond with a custom crafted DNS NSEC resource record to trigger an infinite loop in th
    37Monitor

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:systemd242-4 · Debian:12Package registry (OSV)
opensuse:systemd249.4-2.2 · openSUSE:TumbleweedPackage registry (OSV)
red hat:systemd0:239-29.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:systemd-container0:239-29.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:systemd-container-debuginfo0:239-29.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:systemd-debuginfo0:239-29.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:systemd-debugsource0:239-29.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:systemd-devel0:239-29.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:systemd-journal-remote0:239-29.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:systemd-journal-remote-debuginfo0:239-29.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:systemd-libs0:239-29.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:systemd-libs-debuginfo0:239-29.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:systemd-pam0:239-29.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:systemd-pam-debuginfo0:239-29.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
suse:systemd234-24.30.1 · SUSE:Linux Enterprise Module for Basesystem 15Package 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

  • Exploit-DB entry ×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.

Public exploit evidence
SourceKindDate
Exploit-DB entrydos2019-04-26

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.

  1. First PoC-1 d
  2. Published
  3. TodayOct 17, 2026+2731 d
EPSS, last 120 days

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 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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-268 · Privilege Chaining

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 (5 more)

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

All records