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: 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: 6.5EPSS: 0%CPEs: 28EXPL: 0CVE-2022-20821 – Cisco IOS XR Open Port Vulnerability
https://notcve.org/view.php?id=CVE-2022-20821
A vulnerability in the health check RPM of Cisco IOS XR Software could allow an unauthenticated, remote attacker to access the Redis instance that is running within the NOSi container. This vulnerability exists because the health check RPM opens TCP port 6379 by default upon activation. An attacker could exploit this vulnerability by connecting to the Redis instance on the open port. A successful exploit could allow the attacker to write to the Redis in-memory database, write arbitrary files to the container filesystem, and retrieve information about the Redis database. Given the configuration of the sandboxed container that the Redis instance runs in, a remote attacker would be unable to execute remote code or abuse the integrity of the Cisco IOS XR Software host system. • https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-redis-ABJyE5xK • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •
CVSS: 7.5EPSS: 0%CPEs: 48EXPL: 0CVE-2021-34737 – Cisco IOS XR Software DHCP Version 4 Server Denial of Service Vulnerability
https://notcve.org/view.php?id=CVE-2021-34737
A vulnerability in the DHCP version 4 (DHCPv4) server feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to trigger a crash of the dhcpd process, resulting in a denial of service (DoS) condition. This vulnerability exists because certain DHCPv4 messages are improperly validated when they are processed by an affected device. An attacker could exploit this vulnerability by sending a malformed DHCPv4 message to an affected device. A successful exploit could allow the attacker to cause a NULL pointer dereference, resulting in a crash of the dhcpd process. While the dhcpd process is restarting, which may take up to approximately two minutes, DHCPv4 server services are unavailable on the affected device. • https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dhcp-dos-pjPVReLU • CWE-476: NULL Pointer Dereference •
CVSS: 7.8EPSS: 0%CPEs: 63EXPL: 0CVE-2021-34728 – Cisco IOS XR Software Authenticated User Privilege Escalation Vulnerabilities
https://notcve.org/view.php?id=CVE-2021-34728
Multiple vulnerabilities in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker with a low-privileged account to elevate privileges on an affected device. For more information about these vulnerabilities, see the Details section of this advisory. Múltiples vulnerabilidades en la CLI de Cisco IOS XR Software podrían permitir a un atacante local autenticado con una cuenta de bajo privilegio elevar los privilegios en un dispositivo afectado. Para conseguir más información sobre estas vulnerabilidades, consulte la sección Details de este aviso • https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-privescal-dZYMrKf • CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') •