It was discovered that a systemd service that uses DynamicUser property can create a SUID/SGID binary that would be allowed to run as the tr
It was discovered that a systemd service that uses DynamicUser property can create a SUID/SGID binary that would be allowed to run as the transient service UID/GID even after the service is terminated. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the UID/GID will be recycled.
- Published
- Apr 26, 2019
- Updated
- Jun 16, 2026
- EPSS
- 0.9% · 59th percentile
- CWE
- CWE-266
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Report tools
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.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| systemd project | systemd | cpe:2.3:a:systemd_project:systemd |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
| netapp | hci management node | cpe:2.3:a:netapp:hci_management_node |
| netapp | snapprotect | cpe:2.3:a:netapp:snapprotect |
| netapp | solidfire | cpe:2.3:a:netapp:solidfire |
| netapp | cn1610 firmware | cpe:2.3:o:netapp:cn1610_firmware |
| netapp | cn1610 | cpe:2.3:h:netapp:cn1610 |
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
- fedoraproject fedora30
- 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.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | systemd | before 242-4 | 242-4 |
| openSUSE:Tumbleweed | systemd | before 249.4-2.2 | 249.4-2.2 |
| Red Hat:enterprise_linux:8::baseos | systemd | before 0:239-29.el8 | 0:239-29.el8 |
| Red Hat:enterprise_linux:8::baseos | systemd-container | before 0:239-29.el8 | 0:239-29.el8 |
| Red Hat:enterprise_linux:8::baseos | systemd-container-debuginfo | before 0:239-29.el8 | 0:239-29.el8 |
| Red Hat:enterprise_linux:8::baseos | systemd-debuginfo | before 0:239-29.el8 | 0:239-29.el8 |
| Red Hat:enterprise_linux:8::baseos | systemd-debugsource | before 0:239-29.el8 | 0:239-29.el8 |
| Red Hat:enterprise_linux:8::baseos | systemd-devel | before 0:239-29.el8 | 0:239-29.el8 |
| Red Hat:enterprise_linux:8::baseos | systemd-journal-remote | before 0:239-29.el8 | 0:239-29.el8 |
| Red Hat:enterprise_linux:8::baseos | systemd-journal-remote-debuginfo | before 0:239-29.el8 | 0:239-29.el8 |
| Red Hat:enterprise_linux:8::baseos | systemd-libs | before 0:239-29.el8 | 0:239-29.el8 |
| Red Hat:enterprise_linux:8::baseos | systemd-libs-debuginfo | before 0:239-29.el8 | 0:239-29.el8 |
| Red Hat:enterprise_linux:8::baseos | systemd-pam | before 0:239-29.el8 | 0:239-29.el8 |
| Red Hat:enterprise_linux:8::baseos | systemd-pam-debuginfo | before 0:239-29.el8 | 0:239-29.el8 |
| Red Hat:enterprise_linux:8::baseos | systemd-tests | before 0:239-29.el8 | 0:239-29.el8 |
| Red Hat:enterprise_linux:8::baseos | systemd-tests-debuginfo | before 0:239-29.el8 | 0:239-29.el8 |
| Red Hat:enterprise_linux:8::baseos | systemd-udev | before 0:239-29.el8 | 0:239-29.el8 |
| Red Hat:enterprise_linux:8::baseos | systemd-udev-debuginfo | before 0:239-29.el8 | 0:239-29.el8 |
| SUSE:Linux Enterprise Module for Basesystem 15 | systemd | before 234-24.30.1 | 234-24.30.1 |
Same product
systemd project: all recordsOther 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 th37Monitor
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:systemd | 242-4 · Debian:12 | Package registry (OSV) |
| opensuse:systemd | 249.4-2.2 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:systemd | 0:239-29.el8 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:systemd-container | 0:239-29.el8 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:systemd-container-debuginfo | 0:239-29.el8 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:systemd-debuginfo | 0:239-29.el8 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:systemd-debugsource | 0:239-29.el8 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:systemd-devel | 0:239-29.el8 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:systemd-journal-remote | 0:239-29.el8 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:systemd-journal-remote-debuginfo | 0:239-29.el8 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:systemd-libs | 0:239-29.el8 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:systemd-libs-debuginfo | 0:239-29.el8 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:systemd-pam | 0:239-29.el8 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:systemd-pam-debuginfo | 0:239-29.el8 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| suse:systemd | 234-24.30.1 · SUSE:Linux Enterprise Module for Basesystem 15 | 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
- 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.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | dos | 2019-04-26 |
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.
- First PoC-1 d
- Published
- TodaySep 30, 2026+2714 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
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
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-266 · Incorrect Privilege AssignmentCVSS 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.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- www.securityfocus.com/bid/108116
- bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3843
- lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
- lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5JXQAKSTMABZ46EVCRMW62DHWYHTTFES/
- security.netapp.com/advisory/ntap-20190619-0002/
- usn.ubuntu.com/4269-1/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.