CVSS: 7.8EPSS: 0%CPEs: 13EXPL: 0CVE-2020-35498 – openvswitch: limitation in the OVS packet parsing in userspace leads to DoS
https://notcve.org/view.php?id=CVE-2020-35498
A vulnerability was found in openvswitch. A limitation in the implementation of userspace packet parsing can allow a malicious user to send a specially crafted packet causing the resulting megaflow in the kernel to be too wide, potentially causing a denial of service. The highest threat from this vulnerability is to system availability. Se encontró una vulnerabilidad en openvswitch. Una limitación en la implementación del análisis de paquetes del espacio de usuario puede permitir a un usuario malicioso envíe un paquete especialmente diseñado, lo que hace que el megaflujo resultante en el kernel sea demasiado amplio, causando potencialmente una denegación de servicio. • https://bugzilla.redhat.com/show_bug.cgi?id=1908845 https://lists.debian.org/debian-lts-announce/2021/02/msg00032.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UJ4DXFJWMZ325ECZXPZOSK7BOEDJZHPR https://security.gentoo.org/glsa/202311-16 https://www.debian.org/security/2021/dsa-4852 https://www.openwall.com/lists/oss-security/2021/02/10/4 https://access.redhat.com/security/cve/CVE-2020-35498 • CWE-400: Uncontrolled Resource Consumption •
CVSS: 7.5EPSS: 0%CPEs: 37EXPL: 0CVE-2020-27827 – lldp/openvswitch: denial of service via externally triggered memory leak
https://notcve.org/view.php?id=CVE-2020-27827
A flaw was found in multiple versions of OpenvSwitch. Specially crafted LLDP packets can cause memory to be lost when allocating data to handle specific optional TLVs, potentially causing a denial of service. The highest threat from this vulnerability is to system availability. Se encontró un fallo en múltiples versiones de OpenvSwitch. Los paquetes LLDP especialmente diseñados pueden causar que una memoria se pierda cuando se asignan datos para manejar TLV opcionales específicos, potencialmente causando una denegación de servicio. • https://bugzilla.redhat.com/show_bug.cgi?id=1921438 https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3T5XHPOGIPWCRRPJUE6P3HVC5PTSD5JS https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYA4AMJXCNF6UPFG36L2TPPT32C242SP https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKQWHG2SZJZSGC7PXVDAEJYBN7ESDR7D https://mail.openvswitch.org/pipermail/ovs-dev/2021&# • CWE-400: Uncontrolled Resource Consumption •
CVSS: 5.9EPSS: 0%CPEs: 1EXPL: 0CVE-2017-14970
https://notcve.org/view.php?id=CVE-2017-14970
In lib/ofp-util.c in Open vSwitch (OvS) before 2.8.1, there are multiple memory leaks while parsing malformed OpenFlow group mod messages. NOTE: the vendor disputes the relevance of this report, stating "it can only be triggered by an OpenFlow controller, but OpenFlow controllers have much more direct and powerful ways to force Open vSwitch to allocate memory, such as by inserting flows into the flow table." En lib/ofp-util.c en Open vSwitch (OvS) en versiones anteriores a 2.8.1, hay múltiples fugas de memoria al analizar sintácticamente mensajes mod grupales OpenFlow malformados. NOTA: El proveedor discute la relevancia de este informe, diciendo que "solo puede ser iniciado mediante un controlador OpenFlow, pero los controladores OpenFlow tienen formas mucho más directas y poderosas para forzar a Open vSwitch a asignar memoria, como insertando flujos en la tabla de flujo". • https://mail.openvswitch.org/pipermail/ovs-dev/2017-September/339085.html https://mail.openvswitch.org/pipermail/ovs-dev/2017-September/339086.html • CWE-772: Missing Release of Resource after Effective Lifetime •
CVSS: 9.8EPSS: 0%CPEs: 1EXPL: 0CVE-2017-9264 – openvswitch: Buffer over-read while parsing malformed TCP, UDP and IPv6 packets
https://notcve.org/view.php?id=CVE-2017-9264
In lib/conntrack.c in the firewall implementation in Open vSwitch (OvS) 2.6.1, there is a buffer over-read while parsing malformed TCP, UDP, and IPv6 packets in the functions `extract_l3_ipv6`, `extract_l4_tcp`, and `extract_l4_udp` that can be triggered remotely. En la biblioteca lib/conntrack.c en la implementación del firewall en Open vSwitch (OvS) versión 2.6.1, se presenta una lectura excesiva del búfer mientras se analizan los paquetes TCP, UDP e IPv6 malformados en las funciones “extract_l3_ipv6”, “extract_l4_tcp” y “extract_l4_udp” que pueden ser activadas remotamente. A buffer over-read was found in the Open vSwitch (OvS) firewall implementation. This flaw can be triggered by parsing a specially crafted TCP, UDP, or IPv6 packet. A remote attack could use this flaw to cause a Denial of Service (DoS). • https://access.redhat.com/errata/RHSA-2017:2418 https://access.redhat.com/errata/RHSA-2017:2648 https://access.redhat.com/errata/RHSA-2017:2727 https://mail.openvswitch.org/pipermail/ovs-dev/2017-March/329323.html https://access.redhat.com/security/cve/CVE-2017-9264 https://bugzilla.redhat.com/show_bug.cgi?id=1457329 • CWE-122: Heap-based Buffer Overflow CWE-125: Out-of-bounds Read •