CVSS: 7.8EPSS: 0%CPEs: 12EXPL: 0CVE-2017-7518 – Kernel: KVM: debug exception via syscall emulation
https://notcve.org/view.php?id=CVE-2017-7518
A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB) being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. Linux guests are not affected by this. Se ha detectado un error en el kernel de Linux en versiones anteriores a la 4.12 en la forma en la que el módulo KVM procesó el bit trap flag(TF) en EFLAGS durante la emulación de la instrucción de la llamada del sistema, lo que conduce a que se lance una excepción de depuración (#DB) en la pila invitada. Un usuario/proceso en un invitado podría utilizar este error para escalar sus privilegios en el invitado. • http://www.openwall.com/lists/oss-security/2017/06/23/5 http://www.securityfocus.com/bid/99263 http://www.securitytracker.com/id/1038782 https://access.redhat.com/articles/3290921 https://access.redhat.com/errata/RHSA-2018:0395 https://access.redhat.com/errata/RHSA-2018:0412 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7518 https://usn.ubuntu.com/3619-1 https://usn.ubuntu.com/3619-2 https://usn.ubuntu.com/3754-1 https://www.debian.org/security&# • CWE-250: Execution with Unnecessary Privileges CWE-755: Improper Handling of Exceptional Conditions •
CVSS: 7.5EPSS: 7%CPEs: 55EXPL: 0CVE-2018-5733 – A malicious client can overflow a reference counter in ISC dhcpd
https://notcve.org/view.php?id=CVE-2018-5733
A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can eventually overflow a 32-bit reference counter, potentially causing dhcpd to crash. Affects ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0. Un cliente malicioso al que se le permite enviar grandes cantidades de tráfico (miles de millones de paquetes) a un servidor DHCP puede terminar desbordando un contador de referencia de 32 bits, provocando el cierre inesperado de dhcpd. Afecta a ISC DHCP desde la versión 4.1.0 hasta la 4.1-ESV-R15, desde la versión 4.2.0 hasta la 4.2.8, desde la versión 4.3.0 hasta la 4.3.6 y a la versión 4.4.0. A denial of service flaw was found in the way dhcpd handled reference counting when processing client requests. • http://www.securityfocus.com/bid/103188 http://www.securitytracker.com/id/1040437 https://access.redhat.com/errata/RHSA-2018:0469 https://access.redhat.com/errata/RHSA-2018:0483 https://kb.isc.org/docs/aa-01567 https://lists.debian.org/debian-lts-announce/2018/03/msg00015.html https://usn.ubuntu.com/3586-1 https://usn.ubuntu.com/3586-2 https://www.debian.org/security/2018/dsa-4133 https://access.redhat.com/security/cve/CVE-2018-5733 https://bugzilla.redhat • CWE-190: Integer Overflow or Wraparound •
CVSS: 8.8EPSS: 0%CPEs: 18EXPL: 0CVE-2018-7550 – QEMU: i386: multiboot OOB access while loading kernel image
https://notcve.org/view.php?id=CVE-2018-7550
The load_multiboot function in hw/i386/multiboot.c in Quick Emulator (aka QEMU) allows local guest OS users to execute arbitrary code on the QEMU host via a mh_load_end_addr value greater than mh_bss_end_addr, which triggers an out-of-bounds read or write memory access. La función load_multiboot en hw/i386/multiboot.c en Quick Emulator (también conocido como QEMU) permite que usuarios locales invitados del sistema operativo ejecuten código arbitrario en el host QEMU mediante un valor mh_load_end_addr mayor que mh_bss_end_addr. Esto desencadena un acceso de lectura o escritura a la memoria fuera de límites. Quick Emulator (QEMU), compiled with the PC System Emulator with multiboot feature support, is vulnerable to an OOB r/w memory access issue. The issue could occur while loading a kernel image during the guest boot, if mh_load_end_addr address is greater than the mh_bss_end_addr address. • http://www.securityfocus.com/bid/103181 https://access.redhat.com/errata/RHSA-2018:1369 https://access.redhat.com/errata/RHSA-2018:2462 https://bugzilla.redhat.com/show_bug.cgi?id=1549798 https://github.com/orangecertcc/security-research/security/advisories/GHSA-f49v-45qp-cv53 https://lists.debian.org/debian-lts-announce/2018/04/msg00015.html https://lists.debian.org/debian-lts-announce/2018/04/msg00016.html https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html https:&#x • CWE-125: Out-of-bounds Read CWE-787: Out-of-bounds Write •
CVSS: 9.8EPSS: 1%CPEs: 14EXPL: 1CVE-2018-7225 – libvncserver: Improper input sanitization in rfbProcessClientNormalMessage in rfbserver.c
https://notcve.org/view.php?id=CVE-2018-7225
An issue was discovered in LibVNCServer through 0.9.11. rfbProcessClientNormalMessage() in rfbserver.c does not sanitize msg.cct.length, leading to access to uninitialized and potentially sensitive data or possibly unspecified other impact (e.g., an integer overflow) via specially crafted VNC packets. Se ha descubierto un problema en LibVNCServer hasta la versión 0.9.11. rfbProcessClientNormalMessage() en rfbserver.c no sanea msg.cct.length, lo que conduce a un acceso a datos no inicializados y potencialmente sensibles o, posiblemente, a otro tipo de impacto sin especificar (por ejemplo, un desbordamiento de enteros) mediante paquetes VNC especialmente manipulados. • http://www.openwall.com/lists/oss-security/2018/02/18/1 http://www.securityfocus.com/bid/103107 https://access.redhat.com/errata/RHSA-2018:1055 https://github.com/LibVNC/libvncserver/issues/218 https://lists.debian.org/debian-lts-announce/2018/03/msg00035.html https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html https://lists.debian.org/debian-lts-announce/2019/11/msg00032.html https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html https://se • CWE-190: Integer Overflow or Wraparound CWE-805: Buffer Access with Incorrect Length Value •
CVSS: 9.8EPSS: 5%CPEs: 18EXPL: 0CVE-2018-5379 – quagga: Double free vulnerability in bgpd when processing certain forms of UPDATE message allowing to crash or potentially execute arbitrary code
https://notcve.org/view.php?id=CVE-2018-5379
The Quagga BGP daemon (bgpd) prior to version 1.2.3 can double-free memory when processing certain forms of UPDATE message, containing cluster-list and/or unknown attributes. A successful attack could cause a denial of service or potentially allow an attacker to execute arbitrary code. El demonio Quagga BGP (bgpd), en versiones anteriores a la 1.2.3, puede realizar una doble liberación (double free) de memoria al procesar ciertos formularios de un mensaje UPDATE que contienen atributos cluster-list y/o desconocidos. Un ataque con éxito podría provocar una denegación de servicio (DoS) o permitir que un atacante ejecute código arbitrario. A double-free vulnerability was found in Quagga. • http://savannah.nongnu.org/forum/forum.php?forum_id=9095 http://www.kb.cert.org/vuls/id/940439 http://www.securityfocus.com/bid/103105 https://access.redhat.com/errata/RHSA-2018:0377 https://cert-portal.siemens.com/productcert/pdf/ssa-451142.pdf https://gogs.quagga.net/Quagga/quagga/src/master/doc/security/Quagga-2018-1114.txt https://lists.debian.org/debian-lts-announce/2018/02/msg00021.html https://security.gentoo.org/glsa/201804-17 https://usn.ubuntu.com/3573-1 • CWE-415: Double Free CWE-416: Use After Free •