CVSS: 6.5EPSS: 0%CPEs: 5EXPL: 0CVE-2023-20233
https://notcve.org/view.php?id=CVE-2023-20233
A vulnerability in the Connectivity Fault Management (CFM) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to incorrect processing of invalid continuity check messages (CCMs). An attacker could exploit this vulnerability by sending crafted CCMs to an affected device. A successful exploit could allow the attacker to cause the CFM service to crash when a user displays information about maintenance end points (MEPs) for peer MEPs on an affected device. Una vulnerabilidad en la función Connectivity Fault Management (CFM) del software Cisco IOS XR podría permitir que un atacante remoto no autenticado cause una condición de denegación de servicio (DoS) en un dispositivo afectado. Esta vulnerabilidad se debe al procesamiento incorrecto de mensajes de verificación de continuidad (CCM) no válidos. • https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xr-cfm-3pWN8MKt • CWE-354: Improper Validation of Integrity Check Value CWE-476: NULL Pointer Dereference •
CVSS: 7.8EPSS: 0%CPEs: 54EXPL: 0CVE-2023-20236
https://notcve.org/view.php?id=CVE-2023-20236
A vulnerability in the iPXE boot function of Cisco IOS XR software could allow an authenticated, local attacker to install an unverified software image on an affected device. This vulnerability is due to insufficient image verification. An attacker could exploit this vulnerability by manipulating the boot parameters for image verification during the iPXE boot process on an affected device. A successful exploit could allow the attacker to boot an unverified software image on the affected device. Una vulnerabilidad en la función de arranque iPXE del software Cisco IOS XR podría permitir que un atacante local autenticado instale una imagen de software no verificada en un dispositivo afectado. Esta vulnerabilidad se debe a una verificación de imagen insuficiente. • https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-ipxe-sigbypass-pymfyqgB • CWE-345: Insufficient Verification of Data Authenticity CWE-347: Improper Verification of Cryptographic Signature •
CVSS: 7.0EPSS: 0%CPEs: 2EXPL: 0CVE-2023-20135
https://notcve.org/view.php?id=CVE-2023-20135
A vulnerability in Cisco IOS XR Software image verification checks could allow an authenticated, local attacker to execute arbitrary code on the underlying operating system. This vulnerability is due to a time-of-check, time-of-use (TOCTOU) race condition when an install query regarding an ISO image is performed during an install operation that uses an ISO image. An attacker could exploit this vulnerability by modifying an ISO image and then carrying out install requests in parallel. A successful exploit could allow the attacker to execute arbitrary code on an affected device. Una vulnerabilidad en las comprobaciones de verificación de imágenes del Software Cisco IOS XR podría permitir que un atacante local autenticado ejecute código arbitrario en el sistema operativo subyacente. Esta vulnerabilidad se debe a una condición de ejecución de tiempo de verificación, tiempo de uso (TOCTOU) cuando se realiza una consulta de instalación relacionada con una imagen ISO durante una operación de instalación que utiliza una imagen ISO. • https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-lnt-L9zOkBz5 • CWE-347: Improper Verification of Cryptographic Signature CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition •
CVSS: 4.6EPSS: 0%CPEs: 43EXPL: 0CVE-2023-20064 – Cisco IOS XR Software Bootloader Unauthenticated Information Disclosure Vulnerability
https://notcve.org/view.php?id=CVE-2023-20064
A vulnerability in the GRand Unified Bootloader (GRUB) for Cisco IOS XR Software could allow an unauthenticated attacker with physical access to the device to view sensitive files on the console using the GRUB bootloader command line. This vulnerability is due to the inclusion of unnecessary commands within the GRUB environment that allow sensitive files to be viewed. An attacker could exploit this vulnerability by being connected to the console port of the Cisco IOS XR device when the device is power-cycled. A successful exploit could allow the attacker to view sensitive files that could be used to conduct additional attacks against the device. • https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-load-infodisc-9rdOr5Fq • CWE-862: Missing Authorization •
CVSS: 8.6EPSS: 0%CPEs: 15EXPL: 0CVE-2023-20049 – Cisco IOS XR Software for ASR 9000 Series Routers Bidirectional Forwarding Detection Denial of Service Vulnerability
https://notcve.org/view.php?id=CVE-2023-20049
A vulnerability in the bidirectional forwarding detection (BFD) hardware offload feature of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers, ASR 9902 Compact High-Performance Routers, and ASR 9903 Compact High-Performance Routers could allow an unauthenticated, remote attacker to cause a line card to reset, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of malformed BFD packets that are received on line cards where the BFD hardware offload feature is enabled. An attacker could exploit this vulnerability by sending a crafted IPv4 BFD packet to an affected device. A successful exploit could allow the attacker to cause line card exceptions or a hard reset, resulting in loss of traffic over that line card while the line card reloads. • https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bfd-XmRescbT • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-805: Buffer Access with Incorrect Length Value •