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-2020-3442

DuoConnect SSH Connection Vulnerability

The DuoConnect client enables users to establish SSH connections to hosts protected by a DNG instance. When a user initiates an SSH connection to a DNG-protected host for the first time using DuoConnect, the user’s browser is opened to a login screen in order to complete authentication determined by the contents of the '-relay' argument. If the ‘-relay’ is set to a URL beginning with "http://", then the browser will initially attempt to load the URL over an insecure HTTP connection, before being immediately redirected to HTTPS (in addition to standard redirect mechanisms, the DNG uses HTTP Strict Transport Security headers to enforce this). After successfully authenticating to a DNG, DuoConnect stores an authentication token in a local system cache, so users do not have to complete this browser-based authentication workflow for every subsequent SSH connection. These tokens are valid for a configurable period of time, which defaults to 8 hours. If a user running DuoConnect already has a valid token, then instead of opening a web browser, DuoConnect directly contacts the DNG, again using the configured '-relay' value, and sends this token, as well as the intended SSH server hostname and port numbers. If the '-relay' argument begins with "http://", then this request will be sent over an insecure connection, and could be exposed to an attacker who is sniffing the traffic on the same network. The DNG authentication tokens that may be exposed during SSH relay may be used to gain network-level access to the servers and ports protected by that given relay host. The DNG provides network-level access only to the protected SSH servers. It does not interact with the independent SSH authentication and encryption. An attacker cannot use a stolen token on its own to authenticate against a DNG-protected SSH server.

CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed

Vendors

Duo

Products

Duoconnect

CVE-2020-3441

Cisco Webex Meetings and Cisco Webex Meetings Server Information Disclosure Vulnerability

A vulnerability in Cisco Webex Meetings and Cisco Webex Meetings Server could allow an unauthenticated, remote attacker to view sensitive information from the meeting room lobby. This vulnerability is due to insufficient protection of sensitive participant information. An attacker could exploit this vulnerability by browsing the Webex roster. A successful exploit could allow the attacker to gather information about other Webex participants, such as email address and IP address, while waiting in the lobby.

CVSS 3.1 · 5.3 Medium EPSS 1.6% KEV · Not listed

Vendors

Cisco

Products

Webex Meetings Webex Meetings Server

CVE-2020-3440

Cisco Webex Meetings Desktop App for Windows Arbitrary File Overwrite Vulnerability

A vulnerability in Cisco Webex Meetings Desktop App for Windows could allow an unauthenticated, remote attacker to overwrite arbitrary files on an end-user system. The vulnerability is due to improper validation of URL parameters that are sent from a website to the affected application. An attacker could exploit this vulnerability by persuading a user to follow a URL to a website that is designed to submit crafted input to the affected application. A successful exploit could allow the attacker to overwrite arbitrary files on the affected system, possibly corrupting or deleting critical system files.

CVSS 3.1 · 6.5 Medium EPSS 2.6% KEV · Not listed

Vendors

Cisco

Products

Webex Meetings

CVE-2020-3437

Cisco SD-WAN vManage Software Information Disclosure Vulnerability

A vulnerability in the web-based management interface of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to read arbitrary files on the underlying filesystem of the device. The vulnerability is due to insufficient file scope limiting. An attacker could exploit this vulnerability by creating a specific file reference on the filesystem and then accessing it through the web-based management interface. A successful exploit could allow the attacker to read arbitrary files from the filesystem of the underlying operating system.

CVSS 3.1 · 6.5 Medium EPSS 2.9% KEV · Not listed

Vendors

Cisco

Products

Sd-wan Firmware

CVE-2020-3435

Cisco AnyConnect Secure Mobility Client for Windows Profile Modification Vulnerability

A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to overwrite VPN profiles on an affected device. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system. The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted IPC message to the AnyConnect process on an affected device. A successful exploit could allow the attacker to modify VPN profile files. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Anyconnect Secure Mobility Client

CVE-2020-3434

Cisco AnyConnect Secure Mobility Client for Windows Denial of Service Vulnerability

A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system. The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted IPC message to the AnyConnect process on an affected device. A successful exploit could allow the attacker to stop the AnyConnect process, causing a DoS condition on the device. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Anyconnect Secure Mobility Client

CVE-2020-3430

Cisco Jabber for Windows Protocol Handler Command Injection Vulnerability

A vulnerability in the application protocol handling features of Cisco Jabber for Windows could allow an unauthenticated, remote attacker to execute arbitrary commands. The vulnerability is due to improper handling of input to the application protocol handlers. An attacker could exploit this vulnerability by convincing a user to click a link within a message sent by email or other messaging platform. A successful exploit could allow the attacker to execute arbitrary commands on a targeted system with the privileges of the user account that is running the Cisco Jabber client software.

CVSS 3.1 · 8.8 High EPSS 3.9% KEV · Not listed

Vendors

Cisco

Products

Jabber

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-2020-3427

Duo Authentication for Windows Logon and RDP Privilege Escalation Vulnerability

The Windows Logon installer prior to 4.1.2 did not properly validate file installation paths. This allows an attacker with local user privileges to coerce the installer to write to arbitrary privileged directories. If successful, an attacker can manipulate files used by Windows Logon, cause Denial of Service (DoS) by deleting file(s), or replace system files to potentially achieve elevation of privileges. Note that this can only exploitable during new installations while the installer is running and is not exploitable once installation is finished. Versions 4.1.2 of Windows Logon addresses this issue.

CVSS 3.1 · 6.6 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Duo Authentication For Windows Logon And Rdp

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-2020-3419

Cisco Webex Meetings and Cisco Webex Meetings Server Ghost Join Vulnerability

A vulnerability in Cisco Webex Meetings and Cisco Webex Meetings Server could allow an unauthenticated, remote attacker to join a Webex session without appearing on the participant list. This vulnerability is due to improper handling of authentication tokens by a vulnerable Webex site. An attacker could exploit this vulnerability by sending crafted requests to a vulnerable Cisco Webex Meetings or Cisco Webex Meetings Server site. A successful exploit requires the attacker to have access to join a Webex meeting, including applicable meeting join links and passwords. The attacker could then exploit this vulnerability to join meetings, without appearing in the participant list, while having full access to audio, video, chat, and screen sharing capabilities.

CVSS 3.1 · 6.5 Medium EPSS 2.2% KEV · Not listed

Vendors

Cisco

Products

Webex Meetings Server

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