Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Local
0

CVE-2019-6454

Disclosure Date: March 21, 2019 •
CVE-2019-6454 CVSS v3 Base Score: 5.5
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

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).

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CVSS V3 Severity and Metrics
Base Score:
5.5 Medium
Impact Score:
3.6
Exploitability Score:
1.8
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
n/a
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

Products

References

Canonical
CVE-2019-6454 (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6454)
BID-107081 (http://www.securityfocus.com/bid/107081)
Advisory
FEDORA-2019-8434288a24 (https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N67IOBOTDOMVNQJ5QRU2MXLEECXPGNVJ)
[oss-security] 20190218 CVE-2019-6454: systemd (PID1) crash with specially crafted D-Bus message (http://www.openwall.com/lists/oss-security/2019/02/18/3)
USN-3891-1 (https://usn.ubuntu.com/3891-1)
https://access.redhat.com/errata/RHSA-2019:0368
http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00070.html
[oss-security] 20190219 CVE-2019-6454: systemd (PID1) crash with specially crafted D-Bus message (http://www.openwall.com/lists/oss-security/2019/02/19/1)
[SECURITY] [DLA 1684-1] 20190219 systemd security update (https://lists.debian.org/debian-lts-announce/2019/02/msg00031.html)
DSA-4393-1 (https://www.debian.org/security/2019/dsa-4393)
https://security.netapp.com/advisory/ntap-20190327-0004
https://kc.mcafee.com/corporate/index?page=content&id=SB10278
https://access.redhat.com/errata/RHSA-2019:0990
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html
https://access.redhat.com/errata/RHSA-2019:1322
https://access.redhat.com/errata/RHSA-2019:1502
https://access.redhat.com/errata/RHSA-2019:2805
FEDORA-2019-8434288a24 (https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N67IOBOTDOMVNQJ5QRU2MXLEECXPGNVJ/)
USN-3891-1 (https://usn.ubuntu.com/3891-1/)
https://security.netapp.com/advisory/ntap-20190327-0004/
[oss-security] 20210720 CVE-2021-33910: Denial of service (stack exhaustion) in systemd (PID 1) (http://www.openwall.com/lists/oss-security/2021/07/20/2)
Miscellaneous
https://github.com/systemd/systemd/commits/master/src/libsystemd/sd-bus/bus-objects.c

Additional Info

Authenticated
Unknown
Exploitable
Unknown
Reliability
Unknown
Stability
Unknown
Available Mitigations
Unknown
Shelf Life
Unknown
Userbase/Installbase
Unknown
Patch Effectiveness
Unknown
Technical Analysis