CVE-2019-6454
What it is
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).
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of service disruption.
- Exploit odds
- 2.0% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 2.0% in the next 30 days (EPSS).
- Severity: 5.5 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 2.0% · EPSS, next 30 days
- Weakness
- CWE-787 · Out-of-bounds write
- Record status
- Modified
Affected
- Systemd Project Systemd 239
- Opensuse Leap 15.0
- Netapp Active Iq Performance Analytics Services
- Debian Linux 8.0
- Debian Linux 9.0
- Fedoraproject Fedora 29
- Canonical Ubuntu Linux 16.04
- Canonical Ubuntu Linux 18.04
Attack profile CVSS 3.1 · 5.5
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2019-6454.md and follow it. Check whether this project is affected by CVE-2019-6454. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- http://www.openwall.com/lists/oss-security/2019/02/18/3
- https://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.c
- https://kc.mcafee.com/corporate/index?page=content&id=SB10278
- http://www.openwall.com/lists/oss-security/2019/02/18/3
- https://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.c
- https://kc.mcafee.com/corporate/index?page=content&id=SB10278
References
- http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.html
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html
- http://www.openwall.com/lists/oss-security/2019/02/18/3
- http://www.openwall.com/lists/oss-security/2019/02/19/1
- http://www.openwall.com/lists/oss-security/2021/07/20/2
- http://www.securityfocus.com/bid/107081
- https://access.redhat.com/errata/RHSA-2019:0368
- https://access.redhat.com/errata/RHSA-2019:0990
- https://access.redhat.com/errata/RHSA-2019:1322
- https://access.redhat.com/errata/RHSA-2019:1502
- https://access.redhat.com/errata/RHSA-2019:2805
- https://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.c
- https://kc.mcafee.com/corporate/index?page=content&id=SB10278
- https://lists.debian.org/debian-lts-announce/2019/02/msg00031.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N67IOBOTDOMVNQJ5QRU2MXLEECXPGNVJ/
- https://security.netapp.com/advisory/ntap-20190327-0004/
- https://usn.ubuntu.com/3891-1/
- https://www.debian.org/security/2019/dsa-4393
- http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.html
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html
- http://www.openwall.com/lists/oss-security/2019/02/18/3
- http://www.openwall.com/lists/oss-security/2019/02/19/1
- http://www.openwall.com/lists/oss-security/2021/07/20/2
- http://www.securityfocus.com/bid/107081
- https://access.redhat.com/errata/RHSA-2019:0368