CVSS: 7.0EPSS: 0%CPEs: 7EXPL: 2CVE-2019-3842 – systemd - Lack of Seat Verification in PAM Module Permits Spoofing Active Session to polkit
https://notcve.org/view.php?id=CVE-2019-3842
In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the environment before using the XDG_SEAT variable. It is possible for an attacker, in some particular configurations, to set a XDG_SEAT environment variable which allows for commands to be checked against polkit policies using the "allow_active" element rather than "allow_any". En systemd anterior de la versión v242-rc4, fue encontrado que pam_systemd no sanea apropiadamente el entorno anterior usando la variable XDG_SEAT. Es posible que un atacante, en ciertas configuraciones particulares, establezca una variable de entorno XDG_SEAT que permita comprobar los comandos contra las políticas polkit utilizando el elemento "allow_active" en lugar de "allow_any". It was discovered that pam_systemd does not properly sanitize the environment before using the XDG_SEAT variable. • https://www.exploit-db.com/exploits/46743 http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html http://packetstormsecurity.com/files/152610/systemd-Seat-Verification-Active-Session-Spoofing.html https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3842 https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E https:// • CWE-285: Improper Authorization CWE-863: Incorrect Authorization •
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 •