CVE-2020-3473

Cisco IOS XR Software Authenticated User Privilege Escalation Vulnerability

A vulnerability in task group assignment for a specific CLI command in Cisco IOS XR Software could allow an authenticated, local CLI shell user to elevate privileges and gain full administrative control of the device. The vulnerability is due to incorrect mapping of a command to task groups within the source code. An attacker could exploit this vulnerability by first authenticating to the local CLI shell on the device and using the CLI command to bypass the task group–based checks. A successful exploit could allow the attacker to elevate privileges and perform actions on the device without authorization checks.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

8201 8202 8808 and 16 more

CVE-2020-3465

Cisco IOS XE Software Ethernet Frame Denial of Service Vulnerability

A vulnerability in Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a device to reload. The vulnerability is due to incorrect handling of certain valid, but not typical, Ethernet frames. An attacker could exploit this vulnerability by sending the Ethernet frames onto the Ethernet segment. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition.

CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

1100-4p 1100-8p 1100 Terminal Services Gateways and 16 more

CVE-2020-3449

Cisco IOS XR Software Additional Paths Denial of Service Vulnerability

A vulnerability in the Border Gateway Protocol (BGP) additional paths feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to prevent authorized users from monitoring the BGP status and cause the BGP process to stop processing new updates, resulting in a denial of service (DOS) condition. The vulnerability is due to an incorrect calculation of lexicographical order when displaying additional path information within Cisco IOS XR Software, which causes an infinite loop. An attacker could exploit this vulnerability by sending a specific BGP update from a BGP neighbor peer session of an affected device; an authorized user must then issue a show bgp command for the vulnerability to be exploited. A successful exploit could allow the attacker to prevent authorized users from properly monitoring the BGP status and prevent BGP from processing new updates, resulting in outdated information in the routing and forwarding tables.

CVSS 3.1 · 4.3 Medium EPSS 1.1% KEV · Not listed

Vendors

Cisco

Products

Ios Xr

CVE-2020-3444

Cisco SD-WAN Software Packet Filtering Bypass Vulnerability

A vulnerability in the packet filtering features of Cisco SD-WAN Software could allow an unauthenticated, remote attacker to bypass L3 and L4 traffic filters. The vulnerability is due to improper traffic filtering conditions on an affected device. An attacker could exploit this vulnerability by crafting a malicious TCP packet with specific characteristics and sending it to a targeted device. A successful exploit could allow the attacker to bypass the L3 and L4 traffic filters and inject an arbitrary packet into the network.

CVSS 3.1 · 7.5 High EPSS 1.5% KEV · Not listed

Vendors

Cisco

Products

Ios Xe

CVE-2020-3429

Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family WPA Denial of Service Vulnerability

A vulnerability in the WPA2 and WPA3 security implementation of Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family could allow an unauthenticated, adjacent attacker to cause denial of service (DoS) condition on an affected device. The vulnerability is due to incorrect packet processing during the WPA2 and WPA3 authentication handshake when configured for dot1x or pre-shared key (PSK) authentication key management (AKM) with 802.11r BSS Fast Transition (FT) enabled. An attacker could exploit this vulnerability by sending a crafted authentication packet to an affected device. A successful exploit could cause an affected device to reload, resulting in a DoS condition.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Catalyst 9300 Catalyst 9400 Catalyst 9500 and 5 more

CVE-2020-3428

Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family WLAN Local Profiling Denial of Service Vulnerability

A vulnerability in the WLAN Local Profiling feature of Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to incorrect parsing of HTTP packets while performing HTTP-based endpoint device classifications. An attacker could exploit this vulnerability by sending a crafted HTTP packet to an affected device. A successful exploit could cause an affected device to reboot, resulting in a DoS condition.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

1100 Integrated Services Router 1101 Integrated Services Router 1109 Integrated Services Router and 71 more

CVE-2020-3426

Cisco IOS Software for Cisco Industrial Routers Virtual-LPWA Unauthorized Access Vulnerability

A vulnerability in the implementation of the Low Power, Wide Area (LPWA) subsystem of Cisco IOS Software for Cisco 800 Series Industrial Integrated Services Routers (Industrial ISRs) and Cisco 1000 Series Connected Grid Routers (CGR1000) could allow an unauthenticated, remote attacker to gain unauthorized read access to sensitive data or cause a denial of service (DoS) condition. The vulnerability is due to a lack of input and validation checking mechanisms for virtual-LPWA (VLPWA) protocol modem messages. An attacker could exploit this vulnerability by supplying crafted packets to an affected device. A successful exploit could allow the attacker to gain unauthorized read access to sensitive data or cause the VLPWA interface of the affected device to shut down, resulting in DoS condition.

CVSS 3.1 · 7.5 High EPSS 2.2% KEV · Not listed

Vendors

Cisco

Products

1120 Connected Grid Router 1240 Connected Grid Router 807 Industrial Integrated Services Router and 3 more

CVE-2020-3425

Cisco IOS XE Software Privilege Escalation Vulnerabilities

Multiple vulnerabilities in the web management framework of Cisco IOS XE Software could allow an authenticated, remote attacker with read-only privileges to elevate privileges to the level of an Administrator user on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

CVSS 3.1 · 8.8 High EPSS 1.8% KEV · Not listed

Vendors

Cisco

Products

1100 Integrated Services Router 1101 Integrated Services Router 1109 Integrated Services Router and 107 more

CVE-2020-3423

Cisco IOS XE Software Arbitrary Code Execution Vulnerability

A vulnerability in the implementation of the Lua interpreter that is integrated in Cisco IOS XE Software could allow an authenticated, local attacker to execute arbitrary code with root privileges on the underlying Linux operating system (OS) of an affected device. The vulnerability is due to insufficient restrictions on Lua function calls within the context of user-supplied Lua scripts. An attacker with valid administrative credentials could exploit this vulnerability by submitting a malicious Lua script. When this file is processed, an exploitable buffer overflow condition could occur. A successful exploit could allow the attacker to execute arbitrary code with root privileges on the underlying Linux OS of the affected device.

CVSS 3.1 · 5.1 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

1100 Integrated Services Router 1101 Integrated Services Router 1109 Integrated Services Router and 23 more

CVE-2020-3422

Cisco IOS XE Software IP Service Level Agreements Denial of Service Vulnerability

A vulnerability in the IP Service Level Agreement (SLA) responder feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the IP SLA responder to reuse an existing port, resulting in a denial of service (DoS) condition. The vulnerability exists because the IP SLA responder could consume a port that could be used by another feature. An attacker could exploit this vulnerability by sending specific IP SLA control packets to the IP SLA responder on an affected device. The control packets must include the port number that could be used by another configured feature. A successful exploit could allow the attacker to cause an in-use port to be consumed by the IP SLA responder, impacting the feature that was using the port and resulting in a DoS condition.

CVSS 3.1 · 7.5 High EPSS 1.3% KEV · Not listed

Vendors

Cisco

Products

1100 Integrated Services Router 1101 Integrated Services Router 1109 Integrated Services Router and 27 more

CVE-2020-3421

Cisco IOS XE Software Zone-Based Firewall Denial of Service Vulnerabilities

Multiple vulnerabilities in the Zone-Based Firewall feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload or stop forwarding traffic through the firewall. The vulnerabilities are due to incomplete handling of Layer 4 packets through the device. An attacker could exploit these vulnerabilities by sending a certain sequence of traffic patterns through the device. A successful exploit could allow the attacker to cause the device to reload or stop forwarding traffic through the firewall, resulting in a denial of service. For more information about these vulnerabilities, see the Details section of this advisory.

CVSS 3.1 · 8.6 High EPSS 1.9% KEV · Not listed

Vendors

Cisco

Products

1100 Integrated Services Router 1101 Integrated Services Router 1109 Integrated Services Router and 21 more

CVE-2020-3418

Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family Improper Access Control Vulnerability

A vulnerability in Cisco IOS XE Wireless Controller Software for Cisco Catalyst 9800 Series Routers could allow an unauthenticated, adjacent attacker to send ICMPv6 traffic prior to the client being placed into RUN state. The vulnerability is due to an incomplete access control list (ACL) being applied prior to RUN state. An attacker could exploit this vulnerability by connecting to the associated service set identifier (SSID) and sending ICMPv6 traffic. A successful exploit could allow the attacker to send ICMPv6 traffic prior to RUN state.

CVSS 3.1 · 4.7 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Catalyst 9800-40 Catalyst 9800-80 Catalyst 9800-cl and 4 more

CVE-2020-3417

Cisco IOS XE Software Arbitrary Code Execution Vulnerability

A vulnerability in Cisco IOS XE Software could allow an authenticated, local attacker to execute persistent code at boot time and break the chain of trust. This vulnerability is due to incorrect validations by boot scripts when specific ROM monitor (ROMMON) variables are set. An attacker could exploit this vulnerability by installing code to a specific directory in the underlying operating system (OS) and setting a specific ROMMON variable. A successful exploit could allow the attacker to execute persistent code on the underlying OS. To exploit this vulnerability, the attacker would need access to the root shell on the device or have physical access to the device.

CVSS 3.1 · 6.8 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Ios Xe

CVE-2020-3416

Cisco IOS XE Software for Cisco ASR 900 Series Route Switch Processor 3 Arbitrary Code Execution Vulnerabilities

Multiple vulnerabilities in the initialization routines that are executed during bootup of Cisco IOS XE Software for Cisco ASR 900 Series Aggregation Services Routers with a Route Switch Processor 3 (RSP3) installed could allow an authenticated, local attacker with high privileges to execute persistent code at bootup and break the chain of trust. These vulnerabilities are due to incorrect validations by boot scripts when specific ROM monitor (ROMMON) variables are set. An attacker could exploit these vulnerabilities by copying a specific file to the local file system of an affected device and defining specific ROMMON variables. A successful exploit could allow the attacker to run arbitrary code on the underlying operating system (OS) with root privileges. To exploit these vulnerabilities, an attacker would need to have access to the root shell on the device or have physical access to the device.

CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Asr 902 Asr 903 Asr 907 and 1 more

CVE-2020-3414

Cisco IOS XE Software for Cisco 4461 Integrated Services Routers Denial of Service Vulnerability

A vulnerability in the packet processing of Cisco IOS XE Software for Cisco 4461 Integrated Services Routers could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to incorrect processing of IPv4 or IPv6 traffic to or through an affected device. An attacker could exploit this vulnerability by sending IP traffic to or through an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

CVSS 3.1 · 8.6 High EPSS 1.9% KEV · Not listed

Vendors

Cisco

Products

4461 Integrated Services Router Ios Xe

CVE-2020-3409

Cisco IOS and IOS XE Software PROFINET Denial of Service Vulnerability

A vulnerability in the PROFINET feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause an affected device to crash and reload, resulting in a denial of service (DoS) condition on the device. The vulnerability is due to insufficient processing logic for crafted PROFINET packets that are sent to an affected device. An attacker could exploit this vulnerability by sending crafted PROFINET packets to an affected device for processing. A successful exploit could allow the attacker to cause the device to crash and reload, resulting in a DoS condition on the device.

CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Ie-3200-8p2s-e Ie-3200-8t2s-e Ie-3300-8p2s-a and 32 more

CVE-2020-3408

Cisco IOS and IOS XE Software Split DNS Denial of Service Vulnerability

A vulnerability in the Split DNS feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability occurs because the regular expression (regex) engine that is used with the Split DNS feature of affected releases may time out when it processes the DNS name list configuration. An attacker could exploit this vulnerability by trying to resolve an address or hostname that the affected device handles. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

CVSS 3.1 · 8.6 High EPSS 1.6% KEV · Not listed

Vendors

Cisco

Products

1100-4g Integrated Services Router 1100-4gltegb Integrated Services Router 1100-4gltena Integrated Services Router and 126 more

CVE-2020-3407

Cisco IOS XE Software RESTCONF and NETCONF-YANG Access Control List Denial of Service Vulnerability

A vulnerability in the RESTCONF and NETCONF-YANG access control list (ACL) function of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload. The vulnerability is due to incorrect processing of the ACL that is tied to the RESTCONF or NETCONF-YANG feature. An attacker could exploit this vulnerability by accessing the device using RESTCONF or NETCONF-YANG. A successful exploit could allow an attacker to cause the device to reload, resulting in a denial of service (DoS) condition.

CVSS 3.1 · 8.6 High EPSS 1.5% KEV · Not listed

Vendors

Cisco

Products

1100-4g Integrated Services Router 1100-4gltegb Integrated Services Router 1100-4gltena Integrated Services Router and 125 more

CVE-2020-3404

Cisco IOS XE Software Consent Token Bypass Vulnerability

A vulnerability in the persistent Telnet/Secure Shell (SSH) CLI of Cisco IOS XE Software could allow an authenticated, local attacker to gain shell access on an affected device and execute commands on the underlying operating system (OS) with root privileges. The vulnerability is due to insufficient enforcement of the consent token in authorizing shell access. An attacker could exploit this vulnerability by authenticating to the persistent Telnet/SSH CLI on an affected device and requesting shell access. A successful exploit could allow the attacker to gain shell access on the affected device and execute commands on the underlying OS with root privileges.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

1100-4g Integrated Services Router 1100-4gltegb Integrated Services Router 1100-4gltena Integrated Services Router and 125 more

CVE-2020-3403

Cisco IOS XE Software Command Injection Vulnerability

A vulnerability in the CLI of Cisco IOS XE Software could allow an authenticated, local attacker to inject a command to the underlying operating system that will execute with root privileges upon the next reboot of the device. The authenticated user must have privileged EXEC permissions on the device. The vulnerability is due to insufficient protection of values passed to a script that executes during device startup. An attacker could exploit this vulnerability by writing values to a specific file. A successful exploit could allow the attacker to execute commands with root privileges each time the affected device is restarted.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Catalyst 9800-40 Catalyst 9800-80 Catalyst 9800-cl and 4 more