CVE-2019-6454: An issue was discovered in sd-bus in systemd 239.
Noroxi assessment
Priority: Monitor (action score 23/100)
- 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: 2% (FIRST EPSS); higher than 81% 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) 240-6; systemd (Debian:8) 215-17+deb8u10; systemd (Debian:9) 232-25+deb9u9.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to systemd (Debian:12) 240-6; systemd (Debian:8) 215-17+deb8u10; systemd (Debian:9) 232-25+deb9u9 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
An issue was discovered in sd-bus in systemd 239. bus_process_object() in libsystemd/sd-bus/bus-objects.c allocates a variable-length stack buffer for temporarily storing the object path of incoming D-Bus messages. An unprivileged local user can exploit this by sending a specially crafted message to PID1, causing the stack pointer to jump over the stack guard pages into an unmapped memory region and trigger a denial of service (systemd PID1 crash and kernel panic).
- BDU:2019-01413
- DLA-1684-1
- DSA-4393-1
- openSUSE-SU-2019:0255-1
- openSUSE-SU-2024:11420-1
- RHSA-2019:0368
- RHSA-2019:0457
- RHSA-2019:0461
- RHSA-2019:0990
- RHSA-2019:1322
- RHSA-2019:1502
- RHSA-2019:2805
- SUSE-SU-2019:0424-1
- SUSE-SU-2019:0425-1
- SUSE-SU-2019:0425-2
- SUSE-SU-2019:0426-1
- SUSE-SU-2019:0428-1
- SUSE-SU-2019:1265-1
- SUSE-SU-2019:1364-1
- SUSE-SU-2019:1364-2
- Published
- Mar 21, 2019
- Updated
- Jun 16, 2026
- EPSS
- 2.0% · 81th percentile
- CWE
- CWE-787
Report tools
Action score
23
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.0%
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.
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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 |
|---|---|---|
| systemd project | systemd | cpe:2.3:a:systemd_project:systemd |
| opensuse | leap | cpe:2.3:o:opensuse:leap |
| netapp | active iq performance analytics services | cpe:2.3:a:netapp:active_iq_performance_analytics_services |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
| redhat | enterprise linux | cpe:2.3:o:redhat:enterprise_linux |
| redhat | enterprise linux compute node eus | cpe:2.3:o:redhat:enterprise_linux_compute_node_eus |
| redhat | enterprise linux desktop | cpe:2.3:o:redhat:enterprise_linux_desktop |
| redhat | enterprise linux eus | cpe:2.3:o:redhat:enterprise_linux_eus |
| redhat | enterprise linux for ibm z systems eus | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus |
| redhat | enterprise linux for power big endian eus | cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian_eus |
and 10 more
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 linux18.10
- debian debian linux8.0
- debian debian linux9.0
- fedoraproject fedora29
- mcafee web gatewaybefore 7.7.2.21
- mcafee web gateway8.0.0 and later · before 8.1.1
- mcafee web gateway7.8.0 and later · before 7.8.2.8
- netapp active iq performance analytics servicesall versions
- opensuse leap15.0
- redhat enterprise linux8.0
- redhat enterprise linux compute node eus7.5
- redhat enterprise linux desktop7.0
- redhat enterprise linux eus7.4
- redhat enterprise linux eus7.5
- redhat enterprise linux eus8.1
- redhat enterprise linux eus8.2
- redhat enterprise linux eus8.4
- redhat enterprise linux for ibm z systems eus7.4
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 240-6 | 240-6 |
| Debian:8 | systemd | before 215-17+deb8u10 | 215-17+deb8u10 |
| Debian:9 | systemd | before 232-25+deb9u9 | 232-25+deb9u9 |
| openSUSE:Leap 15.0 | systemd | before 234-lp150.20.15.1 | 234-lp150.20.15.1 |
| openSUSE:Leap 15.0 | systemd-mini | before 234-lp150.20.15.1 | 234-lp150.20.15.1 |
| openSUSE:Tumbleweed | systemd | before 249.4-2.2 | 249.4-2.2 |
| Red Hat:enterprise_linux:7::client | libgudev1 | before 0:219-62.el7_6.5 | 0:219-62.el7_6.5 |
| Red Hat:enterprise_linux:7::client | libgudev1-devel | before 0:219-62.el7_6.5 | 0:219-62.el7_6.5 |
| Red Hat:enterprise_linux:7::client | systemd | before 0:219-62.el7_6.5 | 0:219-62.el7_6.5 |
| Red Hat:enterprise_linux:7::client | systemd-debuginfo | before 0:219-62.el7_6.5 | 0:219-62.el7_6.5 |
| Red Hat:enterprise_linux:7::client | systemd-devel | before 0:219-62.el7_6.5 | 0:219-62.el7_6.5 |
| Red Hat:enterprise_linux:7::client | systemd-journal-gateway | before 0:219-62.el7_6.5 | 0:219-62.el7_6.5 |
| Red Hat:enterprise_linux:7::client | systemd-libs | before 0:219-62.el7_6.5 | 0:219-62.el7_6.5 |
| Red Hat:enterprise_linux:7::client | systemd-networkd | before 0:219-62.el7_6.5 | 0:219-62.el7_6.5 |
| Red Hat:enterprise_linux:7::client | systemd-python | before 0:219-62.el7_6.5 | 0:219-62.el7_6.5 |
| Red Hat:enterprise_linux:7::client | systemd-resolved | before 0:219-62.el7_6.5 | 0:219-62.el7_6.5 |
| Red Hat:enterprise_linux:7::client | systemd-sysv | before 0:219-62.el7_6.5 | 0:219-62.el7_6.5 |
| Red Hat:enterprise_linux:7::hypervisor | redhat-release-virtualization-host | before 0:4.2-8.3.el7 | 0:4.2-8.3.el7 |
| Red Hat:enterprise_linux:7::hypervisor | redhat-virtualization-host | before 0:4.2-20190219.0.el7_6 | 0:4.2-20190219.0.el7_6 |
| Red Hat:enterprise_linux:7::hypervisor | redhat-virtualization-host-image-update | before 0:4.2-20190219.0.el7_6 | 0:4.2-20190219.0.el7_6 |
| Red Hat:enterprise_linux:7::hypervisor | redhat-virtualization-host-image-update-placeholder | before 0:4.2-8.3.el7 | 0:4.2-8.3.el7 |
| Red Hat:enterprise_linux:7::hypervisor | rhvm-appliance | before 2:4.2-20190224.0.el7 | 2:4.2-20190224.0.el7 |
| Red Hat:enterprise_linux:8::baseos | systemd | before 0:239-13.el8_0.3 | 0:239-13.el8_0.3 |
| Red Hat:enterprise_linux:8::baseos | systemd-container | before 0:239-13.el8_0.3 | 0:239-13.el8_0.3 |
+53
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
Published before and after this one in the same product
- ← EarlierCVE-2018-16865Jan 11, 2019 · An allocation of memory without limits, that could result in the stack clashing with another memory region, was discovered in systemd-journa32Monitor
- ← EarlierCVE-2018-16888Jan 14, 2019 · It was discovered systemd does not correctly check the content of PIDFile files before using it to kill processes.18Monitor
- Later →CVE-2019-3842Apr 9, 2019 · In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the environment before using the XDG_SEAT variable28Monitor
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 | 240-6 · Debian:12 | Package registry (OSV) |
| opensuse:systemd | 234-lp150.20.15.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:systemd-mini | 234-lp150.20.15.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| red hat:libgudev1 | 0:219-62.el7_6.5 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:libgudev1-devel | 0:219-62.el7_6.5 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:redhat-virtualization-host | 0:4.2-20190219.0.el7_6 · Red Hat:enterprise_linux:7::hypervisor | Package registry (OSV) |
| red hat:systemd | 0:219-62.el7_6.5 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:systemd-debuginfo | 0:219-62.el7_6.5 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:systemd-devel | 0:219-62.el7_6.5 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:systemd-journal-gateway | 0:219-62.el7_6.5 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:systemd-libs | 0:219-62.el7_6.5 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:systemd-networkd | 0:219-62.el7_6.5 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:systemd-python | 0:219-62.el7_6.5 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:systemd-resolved | 0:219-62.el7_6.5 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:systemd-sysv | 0:219-62.el7_6.5 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| suse:systemd | 210-70.77.1 · SUSE:Linux Enterprise Server 12-LTSS | Package 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.
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).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-20-905 · Oct 30, 2020(OpenShift Güvenlik Güncellemesi)
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
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-787 · Out-of-bounds WriteCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/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 (16 more)Show less
- lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html
- www.openwall.com/lists/oss-security/2019/02/18/3
- www.openwall.com/lists/oss-security/2019/02/19/1
- www.securityfocus.com/bid/107081
- access.redhat.com/errata/RHSA-2019:0368
- access.redhat.com/errata/RHSA-2019:0990
- access.redhat.com/errata/RHSA-2019:1322
- access.redhat.com/errata/RHSA-2019:1502
- access.redhat.com/errata/RHSA-2019:2805
- github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.c
- kc.mcafee.com/corporate/index?page=content&id=SB10278
- lists.debian.org/debian-lts-announce/2019/02/msg00031.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N67IOBOTDOMVNQJ5QRU2MXLEECXPGNVJ/
- security.netapp.com/advisory/ntap-20190327-0004/
- usn.ubuntu.com/3891-1/
- www.debian.org/security/2019/dsa-4393
Vendor advisories and official records. Exploit/PoC links are deliberately left out.