Null pointer dereference

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...

Design/Logic Flaw

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...

CVE-2021-34737

Cisco IOS XR Software DHCPv4 server is affected by CVE-2021-34737. Improper validation of certain DHCPv4 messages can allow an unauthenticated remote attacker to trigger a crash of the dhcpd process, causing a DoS. The crash results from a NULL pointer dereference; during the dhcpd restart (up to...

CVE-2021-34721 Cisco IOS XR Software Command Injection Vulnerabilities

Multiple vulnerabilities in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to gain access to the underlying root shell of an affected device and execute arbitrary commands with root privileges. For more information about these vulnerabilities, see the Details sectio...

CVE-2021-34720 Cisco IOS XR Software IP Service Level Agreements and Two-Way Active Measurement Protocol Denial of Service Vulnerability

A vulnerability in the IP Service Level Agreements IP SLA responder and Two-Way Active Measurement Protocol TWAMP features of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause device packet memory to become exhausted or cause the IP SLA process to crash, resulting in ...

CVE-2021-34718 Cisco IOS XR Software Arbitrary File Read and Write Vulnerability

A vulnerability in the SSH Server process of Cisco IOS XR Software could allow an authenticated, remote attacker to overwrite and read arbitrary files on the local device. This vulnerability is due to insufficient input validation of arguments that are supplied by the user for a specific file...

CVE-2021-34713

Cisco IOS XR Software on ASR 9000 Series routers is affected by a Denial of Service affecting the Layer 2 punt code. The issue allows an unauthenticated, adjacent attacker to send specific Ethernet frames on the segment to trigger a spin loop, making the affected line card reboot or render its ne...

CVE-2021-34713 Cisco IOS XR Software for ASR 9000 Series Routers Denial of Service Vulnerability

A vulnerability in the Layer 2 punt code of Cisco IOS XR Software running on Cisco ASR 9000 Series Aggregation Services Routers could allow an unauthenticated, adjacent attacker to cause the affected line card to reboot. This vulnerability is due to incorrect handling of specific Ethernet frames...

Input validation

A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to inject arbitrary commands that are executed with root privileges on the underlying Linux operating system OS of an affected device. This vulnerability is due to insufficient input validation of...

CVE-2021-1485

CVE-2021-1485 describes a local command-injection vulnerability in the CLI of Cisco IOS XR Software. An authenticated, local attacker can supply crafted input to affected CLI commands, exploiting insufficient input validation to execute arbitrary commands on the underlying Linux OS with root priv...

Cisco IOS XR Software Unauthorized Information Disclosure (cisco-sa-ios-infodisc-4mtm9Gyt)

According to its self-reported version, IOS-XR is affected by an information disclosure vulnerability in its CLI parser component due to insufficient application of restrictions for a specific command. An authenticated, local attacker can exploit this, by issuing a crafted command at the command...

CVE-2021-1370

A vulnerability in a CLI command of Cisco IOS XR Software for the Cisco 8000 Series Routers and Network Convergence System 540 Series Routers running NCS540L software images could allow an authenticated, local attacker to elevate their privilege to root. To exploit this vulnerability, an attacker...

CVE-2021-1288

Multiple vulnerabilities in the ingress packet processing function of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. For more information about these vulnerabilities, see the Details section of this advisory...

CVE-2021-1243

A vulnerability in the Local Packet Transport Services LPTS programming of the SNMP with the management plane protection feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to allow connections despite the management plane protection that is configured to deny access ...

CVE-2021-1128

A vulnerability in the CLI parser of Cisco IOS XR Software could allow an authenticated, local attacker to view more information than their privileges allow. The vulnerability is due to insufficient application of restrictions during the execution of a specific command. An attacker could exploit...

Input validation

A vulnerability in a CLI command of Cisco IOS XR Software for the Cisco 8000 Series Routers and Network Convergence System 540 Series Routers running NCS540L software images could allow an authenticated, local attacker to elevate their privilege to root. To exploit this vulnerability, an attacker...

Design/Logic Flaw

Multiple vulnerabilities in the ingress packet processing function of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. For more information about these vulnerabilities, see the Details section of this advisory...

Design/Logic Flaw

A vulnerability in the Local Packet Transport Services LPTS programming of the SNMP with the management plane protection feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to allow connections despite the management plane protection that is configured to deny access ...

CVE-2021-1136 Cisco IOS XR Software for Cisco 8000 Series Routers and Network Convergence System 540 Series Routers Image Verification Vulnerabilities

Multiple vulnerabilities in Cisco Network Convergence System NCS 540 Series Routers, only when running Cisco IOS XR NCS540L software images, and Cisco IOS XR Software for the Cisco 8000 Series Routers could allow an authenticated, local attacker to execute unsigned code during the boot process on...

CVE-2021-1243

CVE-2021-1243 affects Cisco IOS XR Software, targeting the SNMP management plane protection via the Local Packet Transport Services (LPTS). The root cause is incorrect LPTS programming when SNMP uses management plane protection, enabling an unauthenticated remote attacker to connect to SNMP ports...