CVSS: 5.5EPSS: 0%CPEs: 2EXPL: 0CVE-2018-12928
https://notcve.org/view.php?id=CVE-2018-12928
In the Linux kernel 4.15.0, a NULL pointer dereference was discovered in hfs_ext_read_extent in hfs.ko. This can occur during a mount of a crafted hfs filesystem. En el kernel de Linux 4.15.0, se ha descubierto una desreferencia de puntero NULL en hfs_ext_read_extent en hfs.ko. Esto puede ocurrir cuando se monta un sistema de archivos hfs manipulado. • http://www.securityfocus.com/bid/104593 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1763384 https://marc.info/?l=linux-fsdevel&m=152407263325766&w=2 • CWE-476: NULL Pointer Dereference •
CVSS: 4.9EPSS: 0%CPEs: 3EXPL: 2CVE-2018-12904 – KVM (Nested Virtualization) - L1 Guest Privilege Escalation
https://notcve.org/view.php?id=CVE-2018-12904
In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local attackers could cause L1 KVM guests to VMEXIT, potentially allowing privilege escalations and denial of service attacks due to lack of checking of CPL. En arch/x86/kvm/vmx.c en el kernel de Linux en versiones anteriores a la 4.17.2, cuando se emplea la virtualización anidada, los atacantes locales podrían hacer que los invitados L1 KVM realizasen un VMEXIT, permitiendo escalados de privilegios y ataques de denegación de servicio (DoS) debido a la falta de comprobación de CPL. • https://www.exploit-db.com/exploits/44944 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=727ba748e110b4de50d142edca9d6a9b7e6111d8 https://bugs.chromium.org/p/project-zero/issues/detail?id=1589 https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.17.2 https://github.com/torvalds/linux/commit/727ba748e110b4de50d142edca9d6a9b7e6111d8 https://usn.ubuntu.com/3752-1 https://usn.ubuntu.com/3752-2 https://usn.ubuntu.com/3752-3 •
CVSS: 6.3EPSS: 0%CPEs: 5EXPL: 0CVE-2018-1000204 – kernel: Infoleak caused by incorrect handling of the SG_IO ioctl
https://notcve.org/view.php?id=CVE-2018-1000204
Linux Kernel version 3.18 to 4.16 incorrectly handles an SG_IO ioctl on /dev/sg0 with dxfer_direction=SG_DXFER_FROM_DEV and an empty 6-byte cmdp. This may lead to copying up to 1000 kernel heap pages to the userspace. This has been fixed upstream in https://github.com/torvalds/linux/commit/a45b599ad808c3c982fdcdc12b0b8611c2f92824 already. The problem has limited scope, as users don't usually have permissions to access SCSI devices. On the other hand, e.g. the Nero user manual suggests doing `chmod o+r+w /dev/sg*` to make the devices accessible. • http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00043.html http://www.openwall.com/lists/oss-security/2018/06/26/3 https://access.redhat.com/errata/RHSA-2018:2948 https://github.com/torvalds/linux/commit/a45b599ad808c3c982fdcdc12b0b8611c2f92824 https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html https://usn.ubuntu.com/3696-1& • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •
CVSS: 10.0EPSS: 0%CPEs: 1EXPL: 1CVE-2018-12714
https://notcve.org/view.php?id=CVE-2018-12714
An issue was discovered in the Linux kernel through 4.17.2. The filter parsing in kernel/trace/trace_events_filter.c could be called with no filter, which is an N=0 case when it expected at least one line to have been read, thus making the N-1 index invalid. This allows attackers to cause a denial of service (slab out-of-bounds write) or possibly have unspecified other impact via crafted perf_event_open and mmap system calls. Se ha descubierto un problema en el kernel de Linux hasta la versión 4.17.2. El análisis del filtros en kernel/trace/trace_events_filter.c podría ser llamado sin un filtro, que es un caso N=0 cuando espera que, por lo menos, se haya leído una línea, lo que hace que el índice N-1 no sea válido. • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=81f9c4e4177d31ced6f52a89bb70e93bfb77ca03 http://www.securityfocus.com/bid/104544 https://bugzilla.kernel.org/show_bug.cgi?id=200019 https://github.com/lcytxw/bug_repro/tree/master/bug_200019 https://github.com/torvalds/linux/commit/81f9c4e4177d31ced6f52a89bb70e93bfb77ca03 • CWE-787: Out-of-bounds Write •
CVSS: 6.3EPSS: 0%CPEs: 1EXPL: 0CVE-2018-12633
https://notcve.org/view.php?id=CVE-2018-12633
An issue was discovered in the Linux kernel through 4.17.2. vbg_misc_device_ioctl() in drivers/virt/vboxguest/vboxguest_linux.c reads the same user data twice with copy_from_user. The header part of the user data is double-fetched, and a malicious user thread can tamper with the critical variables (hdr.size_in and hdr.size_out) in the header between the two fetches because of a race condition, leading to severe kernel errors, such as buffer over-accesses. This bug can cause a local denial of service and information leakage. Se ha descubierto un problema en el kernel de Linux hasta la versión 4.17.2. vbg_misc_device_ioctl() en drivers/virt/vboxguest/vboxguest_linux.c lee los mismos datos de usuario dos veces con copy_from_user. La cabecera de los datos de usuario es de tipo double-fetch y un hilo de usuario malicioso puede falsificar las variables críticas (hdr.size_in y hdr.size_out) en la cabecera entre los dos fetch debido a una condición de carrera. • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bd23a7269834dc7c1f93e83535d16ebc44b75eba https://bugzilla.kernel.org/show_bug.cgi?id=200131 https://github.com/torvalds/linux/commit/bd23a7269834dc7c1f93e83535d16ebc44b75eba • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •