CVSS: 7.0EPSS: 0%CPEs: 55EXPL: 1CVE-2019-6454 – systemd: Insufficient input validation in bus_process_object() resulting in PID 1 crash
https://notcve.org/view.php?id=CVE-2019-6454
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). Se ha descubierto un problema en sd-bus en systemd 239. bus_process_object() en libsystemd/sd-bus/bus-objects.c asigna un búfer de pila de longitud variable para almacenar temporalmente la ruta de objeto de los mensajes D-Bus entrantes. Un usuario local sin privilegios puede explotar esto enviando un mensaje especialmente manipulado a PID1, provocando que el puntero de la pila salte por las páginas guard de la pila hasta una región de memoria no mapeada y desencadene una denegación de servicio (cierre inesperado del PID1 en systemd y pánico del kernel). It was discovered that systemd allocates a buffer large enough to store the path field of a dbus message without performing enough checks. • 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 • CWE-20: Improper Input Validation CWE-787: Out-of-bounds Write •
CVSS: 4.7EPSS: 0%CPEs: 7EXPL: 0CVE-2018-16888 – systemd: kills privileged process if unprivileged PIDFile was tampered
https://notcve.org/view.php?id=CVE-2018-16888
It was discovered systemd does not correctly check the content of PIDFile files before using it to kill processes. When a service is run from an unprivileged user (e.g. User field set in the service file), a local attacker who is able to write to the PIDFile of the mentioned service may use this flaw to trick systemd into killing other services and/or privileged processes. Versions before v237 are vulnerable. Se ha descubierto que systemd no comprueba correctamente el contenido de archivos PIDFile antes de emplearlo para terminar procesos. • https://access.redhat.com/errata/RHSA-2019:2091 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16888 https://lists.apache.org/thread.html/5960a34a524848cd722fd7ab7e2227eac10107b0f90d9d1e9c3caa74%40%3Cuser.cassandra.apache.org%3E https://security.netapp.com/advisory/ntap-20190307-0007 https://usn.ubuntu.com/4269-1 https://access.redhat.com/security/cve/CVE-2018-16888 https://bugzilla.redhat.com/show_bug.cgi?id=1662867 • CWE-250: Execution with Unnecessary Privileges CWE-269: Improper Privilege Management •
CVSS: 7.8EPSS: 0%CPEs: 23EXPL: 1CVE-2018-16864 – systemd: stack overflow when calling syslog from a command with long cmdline
https://notcve.org/view.php?id=CVE-2018-16864
An allocation of memory without limits, that could result in the stack clashing with another memory region, was discovered in systemd-journald when a program with long command line arguments calls syslog. A local attacker may use this flaw to crash systemd-journald or escalate his privileges. Versions through v240 are vulnerable. Se ha descubierto una asignación de memoria sin límites, que podría resultar en que la pila choque con otra región de memoria, en systemd-journald, cuando un programa con argumentos largos de la línea de comandos llama a syslog. Un atacante local podría emplear este error para provocar el cierre inesperado de systemd-journald o escalar sus privilegios. • http://www.openwall.com/lists/oss-security/2021/07/20/2 http://www.securityfocus.com/bid/106523 https://access.redhat.com/errata/RHBA-2019:0327 https://access.redhat.com/errata/RHSA-2019:0049 https://access.redhat.com/errata/RHSA-2019:0204 https://access.redhat.com/errata/RHSA-2019:0271 https://access.redhat.com/errata/RHSA-2019:0342 https://access.redhat.com/errata/RHSA-2019:0361 https://access.redhat.com/errata/RHSA-2019:2402 https://bugzilla.redhat.com/show_ • CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 7.8EPSS: 0%CPEs: 20EXPL: 1CVE-2018-16865 – systemd: stack overflow when receiving many journald entries
https://notcve.org/view.php?id=CVE-2018-16865
An allocation of memory without limits, that could result in the stack clashing with another memory region, was discovered in systemd-journald when many entries are sent to the journal socket. A local attacker, or a remote one if systemd-journal-remote is used, may use this flaw to crash systemd-journald or execute code with journald privileges. Versions through v240 are vulnerable. Se ha descubierto una asignación de memoria sin límites que podría resultar en que la pila choque con otra región de memoria, en systemd-journald, cuando se envían muchas entradas al socket de journal. Un atacante local, o uno remoto si se emplea systemd-journal-remote, podría emplear este error para provocar el cierre inesperado de systemd-journald o ejecutar código con privilegios de journald. • http://packetstormsecurity.com/files/152841/System-Down-A-systemd-journald-Exploit.html http://seclists.org/fulldisclosure/2019/May/21 http://www.openwall.com/lists/oss-security/2019/05/10/4 http://www.openwall.com/lists/oss-security/2021/07/20/2 http://www.securityfocus.com/bid/106525 https://access.redhat.com/errata/RHBA-2019:0327 https://access.redhat.com/errata/RHSA-2019:0049 https://access.redhat.com/errata/RHSA-2019:0204 https://access.redhat.com/errata/RHSA-2019 • CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 8.8EPSS: 0%CPEs: 11EXPL: 0CVE-2018-15688 – Out-of-Bounds write in systemd-networkd dhcpv6 option handling
https://notcve.org/view.php?id=CVE-2018-15688
A buffer overflow vulnerability in the dhcp6 client of systemd allows a malicious dhcp6 server to overwrite heap memory in systemd-networkd. Affected releases are systemd: versions up to and including 239. Una vulnerabilidad de desbordamiento de búfer en el cliente dhcp6 de systemd permite que un servidor dhcp6 malicioso sobrescriba memoria dinámica (heap) en systemd-networkd. Las versiones afectadas de systemd son todas hasta la 239 incluida. It was discovered that systemd-network does not correctly keep track of a buffer size when constructing DHCPv6 packets. • http://www.securityfocus.com/bid/105745 https://access.redhat.com/errata/RHBA-2019:0327 https://access.redhat.com/errata/RHSA-2018:3665 https://access.redhat.com/errata/RHSA-2019:0049 https://github.com/systemd/systemd/pull/10518 https://lists.debian.org/debian-lts-announce/2018/11/msg00017.html https://security.gentoo.org/glsa/201810-10 https://usn.ubuntu.com/3806-1 https://usn.ubuntu.com/3807-1 https://access.redhat.com/security/cve/CVE-2018-15688 https:/&#x • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-122: Heap-based Buffer Overflow •