CVE-2019-6454

Public Exploit

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).

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.15%
Vendor Advisory fedoraproject.org Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N67IOBOTDOMVNQJ5QRU2MXLEECXPGNVJ/ vendor advisory
http://www.openwall.com/lists/oss-security/2019/02/18/3 patch mailing list third party advisory
http://www.securityfocus.com/bid/107081 third party advisory vdb entry
https://usn.ubuntu.com/3891-1/ third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:0368 third party advisory vendor advisory
https://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.c third party advisory patch
http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.html third party advisory vendor advisory
http://www.openwall.com/lists/oss-security/2019/02/19/1 third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2019/02/msg00031.html third party advisory mailing list
https://www.debian.org/security/2019/dsa-4393 third party advisory vendor advisory
https://security.netapp.com/advisory/ntap-20190327-0004/ third party advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10278 third party advisory patch
https://access.redhat.com/errata/RHSA-2019:0990 third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html vendor advisory mailing list third party advisory
https://access.redhat.com/errata/RHSA-2019:1322 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:1502 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:2805 third party advisory vendor advisory
http://www.openwall.com/lists/oss-security/2021/07/20/2 mailing list third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2019-6454?
CVE-2019-6454 has been scored as a medium severity vulnerability.
How to fix CVE-2019-6454?
To fix CVE-2019-6454, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-6454 being actively exploited in the wild?
It is possible that CVE-2019-6454 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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