HOME VULNERABILITIESCVE-2019-6454

MEDIUM

CVE-2019-6454

CWE-787Published: March 21, 2019· Updated: Jun 17, 2026

5.5

CVSS v3.1

Official Description

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).

Technical Analysis

CVE-2019-6454 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Affected Vendors & Products

Canonical1 product(s)

ubuntu linux

Debian1 product(s)

debian linux

Fedora1 product(s)

fedora

mcafee1 product(s)

web gateway

netapp1 product(s)

active iq performance analytics services

openSUSE1 product(s)

leap

Red Hat15 product(s)

enterprise linuxenterprise linux compute node eusenterprise linux desktopenterprise linux eusenterprise linux for ibm z systems eusenterprise linux for power big endian eusenterprise linux for power little endianenterprise linux for power little endian eusenterprise linux serverenterprise linux server ausenterprise linux server eusenterprise linux server for power little endian update services for sap solutions+3

systemd_project1 product(s)

systemd

Source: NVD CPE · 53 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.openwall.com/lists/oss-security/2019/02/18/3

PATCHhttps://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.c

PATCHhttps://kc.mcafee.com/corporate/index?page=content&id=SB10278

PATCHhttp://www.openwall.com/lists/oss-security/2019/02/18/3

PATCHhttps://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.c

PATCHhttps://kc.mcafee.com/corporate/index?page=content&id=SB10278

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html

ADVISORYhttp://www.openwall.com/lists/oss-security/2019/02/19/1

ADVISORYhttp://www.openwall.com/lists/oss-security/2021/07/20/2

ADVISORYhttp://www.securityfocus.com/bid/107081

ADVISORYhttps://access.redhat.com/errata/RHSA-2019:0368

ADVISORYhttps://access.redhat.com/errata/RHSA-2019:0990

ADVISORYhttps://access.redhat.com/errata/RHSA-2019:1322

ADVISORYhttps://access.redhat.com/errata/RHSA-2019:1502

ADVISORYhttps://access.redhat.com/errata/RHSA-2019:2805

ADVISORYhttps://lists.debian.org/debian-lts-announce/2019/02/msg00031.html

ADVISORYhttps://security.netapp.com/advisory/ntap-20190327-0004/

ADVISORYhttps://usn.ubuntu.com/3891-1/

ADVISORYhttps://www.debian.org/security/2019/dsa-4393

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html

ADVISORYhttp://www.openwall.com/lists/oss-security/2019/02/19/1

ADVISORYhttp://www.openwall.com/lists/oss-security/2021/07/20/2

ADVISORYhttp://www.securityfocus.com/bid/107081

ADVISORYhttps://access.redhat.com/errata/RHSA-2019:0368

ADVISORYhttps://access.redhat.com/errata/RHSA-2019:0990

ADVISORYhttps://access.redhat.com/errata/RHSA-2019:1322

ADVISORYhttps://access.redhat.com/errata/RHSA-2019:1502

ADVISORYhttps://access.redhat.com/errata/RHSA-2019:2805

ADVISORYhttps://lists.debian.org/debian-lts-announce/2019/02/msg00031.html

ADVISORYhttps://security.netapp.com/advisory/ntap-20190327-0004/

ADVISORYhttps://usn.ubuntu.com/3891-1/

ADVISORYhttps://www.debian.org/security/2019/dsa-4393

All References (36)

→

http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.htmlThird Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.htmlMailing List · Third Party Advisory

→

http://www.openwall.com/lists/oss-security/2019/02/18/3Mailing List · Patch · Third Party Advisory

→

http://www.openwall.com/lists/oss-security/2019/02/19/1Mailing List · Third Party Advisory

→

http://www.openwall.com/lists/oss-security/2021/07/20/2Exploit · Mailing List · Third Party Advisory

→

http://www.securityfocus.com/bid/107081Third Party Advisory · VDB Entry

→

https://access.redhat.com/errata/RHSA-2019:0368Third Party Advisory

→

https://access.redhat.com/errata/RHSA-2019:0990Third Party Advisory

→

https://access.redhat.com/errata/RHSA-2019:1322Third Party Advisory

→

https://access.redhat.com/errata/RHSA-2019:1502Third Party Advisory

→

https://access.redhat.com/errata/RHSA-2019:2805Third Party Advisory

→

https://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.cPatch · Third Party Advisory

→

https://kc.mcafee.com/corporate/index?page=content&id=SB10278Patch · Third Party Advisory

→

https://lists.debian.org/debian-lts-announce/2019/02/msg00031.htmlMailing List · Third Party Advisory

→

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N67IOBOTDOMVNQJ5QRU2MXLEECXPGNVJ/

Quick Facts

CVE IDCVE-2019-6454

CVSS Score5.5 / 10

SeverityMEDIUM

WeaknessCWE-787

CISA KEVNo

Affected8 vendor(s)

PublishedMar 21, 2019

Related CVEs (CWE-787)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2019-6454 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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