CVSS: 7.8EPSS: 6%CPEs: 37EXPL: 3CVE-2017-1000253 – Linux Kernel PIE Stack Buffer Corruption Vulnerability
https://notcve.org/view.php?id=CVE-2017-1000253
Linux distributions that have not patched their long-term kernels with https://git.kernel.org/linus/a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (committed on April 14, 2015). This kernel vulnerability was fixed in April 2015 by commit a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (backported to Linux 3.10.77 in May 2015), but it was not recognized as a security threat. With CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE enabled, and a normal top-down address allocation strategy, load_elf_binary() will attempt to map a PIE binary into an address range immediately below mm->mmap_base. Unfortunately, load_elf_ binary() does not take account of the need to allocate sufficient space for the entire binary which means that, while the first PT_LOAD segment is mapped below mm->mmap_base, the subsequent PT_LOAD segment(s) end up being mapped above mm->mmap_base into the are that is supposed to be the "gap" between the stack and the binary. Existe una vulnerabilidad en las distribuciones de Linux que no han parcheado sus kernels de largo mantenimiento con https://git.kernel.org/linus/a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (confirmada el 14 de abril de 2015). • https://www.exploit-db.com/exploits/42887 https://github.com/RicterZ/PIE-Stack-Clash-CVE-2017-1000253 https://github.com/sxlmnwb/CVE-2017-1000253 http://www.securityfocus.com/bid/101010 http://www.securitytracker.com/id/1039434 https://access.redhat.com/errata/RHSA-2017:2793 https://access.redhat.com/errata/RHSA-2017:2794 https://access.redhat.com/errata/RHSA-2017:2795 https://access.redhat.com/errata/RHSA-2017:2796 https://access.redhat.com/errata/RHSA-2017:2797 https • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •
CVSS: 4.9EPSS: 0%CPEs: 5EXPL: 0CVE-2017-12153
https://notcve.org/view.php?id=CVE-2017-12153
A security flaw was discovered in the nl80211_set_rekey_data() function in net/wireless/nl80211.c in the Linux kernel through 4.13.3. This function does not check whether the required attributes are present in a Netlink request. This request can be issued by a user with the CAP_NET_ADMIN capability and may result in a NULL pointer dereference and system crash. Se descubrió un fallo de seguridad en la función nl80211_set_rekey_data() en net/wireless/nl80211.c en el kernel de Linux hasta la versión 4.13.3. La función no comprueba si los atributos requeridos están presentes en una petición Netlink. • http://seclists.org/oss-sec/2017/q3/437 http://www.debian.org/security/2017/dsa-3981 http://www.securityfocus.com/bid/100855 https://bugzilla.novell.com/show_bug.cgi?id=1058410 https://bugzilla.redhat.com/show_bug.cgi?id=1491046 https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211.git/commit/?id=e785fa0a164aa11001cba931367c7f94ffaff888 https://marc.info/?t=150525503100001&r=1&w=2 https://usn.ubuntu.com/3583-1 https://usn.ubuntu.com/3583-2 • CWE-476: NULL Pointer Dereference •
CVSS: 6.0EPSS: 0%CPEs: 1EXPL: 0CVE-2017-12168
https://notcve.org/view.php?id=CVE-2017-12168
The access_pmu_evcntr function in arch/arm64/kvm/sys_regs.c in the Linux kernel before 4.8.11 allows privileged KVM guest OS users to cause a denial of service (assertion failure and host OS crash) by accessing the Performance Monitors Cycle Count Register (PMCCNTR). La función access_pmu_evcntr en arch/arm64/kvm/sys_regs.c en el kernel Linux en versiones anteriores a la 4.8.11 permite que los usuarios KVM invitados del sistema operativo provoquen una denegación de servicio (fallo de aserción y cierre inesperado del sistema operativo del host) accediendo a Performance Monitors Cycle Count Register (PMCCNTR). • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9e3f7a29694049edd728e2400ab57ad7553e5aa9 http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.11 https://bugzilla.redhat.com/show_bug.cgi?id=1492984 https://github.com/torvalds/linux/commit/9e3f7a29694049edd728e2400ab57ad7553e5aa9 • CWE-617: Reachable Assertion •
CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0CVE-2017-14340 – kernel: xfs: unprivileged user kernel oops
https://notcve.org/view.php?id=CVE-2017-14340
The XFS_IS_REALTIME_INODE macro in fs/xfs/xfs_linux.h in the Linux kernel before 4.13.2 does not verify that a filesystem has a realtime device, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) via vectors related to setting an RHINHERIT flag on a directory. La macro XFS_IS_REALTIME_INODE en fs/xfs/xfs_linux.h en el kernel de Linux en versiones anteriores a la 4.13.2 no verifica que un sistema de archivos tenga un dispositivo realtime, lo que permite que usuarios locales provoquen una denegación de servicio (desreferencia de puntero NULL y OOPS) mediante vectores relacionados con la configuración de una marca RHINHERIT en un directorio. A flaw was found where the XFS filesystem code mishandles a user-settable inode flag in the Linux kernel prior to 4.14-rc1. This can cause a local denial of service via a kernel panic. • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b31ff3cdf540110da4572e3e29bd172087af65cc http://seclists.org/oss-sec/2017/q3/436 http://www.debian.org/security/2017/dsa-3981 http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.2 http://www.securityfocus.com/bid/100851 https://access.redhat.com/errata/RHSA-2017:2918 https://bugzilla.redhat.com/show_bug.cgi?id=1491344 https://github.com/torvalds/linux/commit/b31ff3cdf540110da4572e3e29bd172087af65cc https:&# • CWE-391: Unchecked Error Condition CWE-476: NULL Pointer Dereference •
CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 1CVE-2017-14489 – Linux Kernel < 4.14.rc3 - Local Denial of Service
https://notcve.org/view.php?id=CVE-2017-14489
The iscsi_if_rx function in drivers/scsi/scsi_transport_iscsi.c in the Linux kernel through 4.13.2 allows local users to cause a denial of service (panic) by leveraging incorrect length validation. La función iscsi_if_rx en drivers/scsi/scsi_transport_iscsi.c en el kernel de Linux hasta la versión 4.13.2 permite que usuarios locales provoquen una denegación de servicio (pánico) aprovechando que se realiza una validación de longitud incorrecta. Linux kernel versions prior to 4-14-rc3 suffer from a local denial of service vulnerability. • https://www.exploit-db.com/exploits/42932 http://www.debian.org/security/2017/dsa-3981 http://www.securityfocus.com/bid/101011 https://bugzilla.redhat.com/show_bug.cgi?id=1490421 https://patchwork.kernel.org/patch/9923803 https://usn.ubuntu.com/3583-1 https://usn.ubuntu.com/3583-2 • CWE-20: Improper Input Validation •