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 •
CVSS: 7.1EPSS: 0%CPEs: 3EXPL: 0CVE-2022-20758 – Cisco IOS XR Software Border Gateway Protocol Ethernet VPN Denial of Service Vulnerability
https://notcve.org/view.php?id=CVE-2022-20758
A vulnerability in the implementation of the Border Gateway Protocol (BGP) Ethernet VPN (EVPN) functionality in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to the incorrect processing of a BGP update message that contains specific EVPN attributes. An attacker could exploit this vulnerability by sending a BGP update message that contains specific EVPN attributes. To exploit this vulnerability, an attacker must control a BGP speaker that has an established trusted peer connection to an affected device that is configured with the address family L2VPN EVPN to receive and process the update message. This vulnerability cannot be exploited by any data that is initiated by clients on the Layer 2 network or by peers that are not configured to accept the L2VPN EVPN address family. • https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bgpevpn-zWTRtPBb • CWE-399: Resource Management Errors •
CVSS: 9.0EPSS: 0%CPEs: 8EXPL: 0CVE-2021-40120 – Cisco Small Business RV Series Routers Command Injection Vulnerability
https://notcve.org/view.php?id=CVE-2021-40120
A vulnerability in the web-based management interface of certain Cisco Small Business RV Series Routers could allow an authenticated, remote attacker with administrative privileges to inject arbitrary commands into the underlying operating system and execute them using root-level privileges. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending malicious input to a specific field in the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying Linux operating system as a user with root-level privileges. Una vulnerabilidad en la interfaz de administración basada en la web de algunos routers de la serie RV de Cisco Small Business podría permitir a un atacante remoto autenticado con privilegios administrativos inyectar comandos arbitrarios en el sistema operativo subyacente y ejecutarlos usando privilegios de nivel de root. • https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sbrv-cmdinjection-Z5cWFdK • CWE-20: Improper Input Validation CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') •