https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html. The five vulnerabilities — four critical remote code execution (RCE) and a denial of service (DoS) — dubbed CDPwn reside in how CDP (Cisco Discovery Protocol) packets are processed. Researchers said an attacker could exploit this flaw to “gain full control over the target router to traverse between network segments and use the router for subsequent attacks.”. Cisco Discovery Protocol is a Layer 2 protocol. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades. Updated that Cisco Nexus 5500 Platform Switches, Nexus 5600 Platform Switches and Nexus 6000 Series Switches are not affected by this vulnerability. Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 6.x . Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability, (CVE-2020-3118) Cisco IP Phone Remote Code Execution and Denial of Service Vulnerability, ( CVE-2020-3111 ) The DoS flaw meanwhile stems from the CDP implementation in Cisco FXOS, IOS XR and NX-OS software (CVE-2020-3120), which can be exploited by making the CDP daemon of a router or switch allocate large blocks of memory, causing the process to crash. on February 6, 2020, NADEEM AKHTAR “Targets have moved beyond traditional desktops, laptops and servers to devices like IP phones and cameras which contain valuable voice and video data. “Vulnerabilities that allow an attacker to break through network segmentation and move freely across the network pose a tremendous threat to enterprises,” according to Armis researchers. on February 11, 2020, Priyaranjan paul Cisco Discovery Protocol (CDP) is a Layer 2 protocol that is on by default on many cisco devices including IP phones. For help determining the best Cisco NX-OS Software release for a Cisco Nexus Switch, administrators can refer to the following Recommended Releases documents. Join thousands of people who receive the latest breaking cybersecurity news every day. Each contribution has a goal of bringing a unique voice to important cybersecurity topics. The final RCE flaw exists in the CDP implementation on Cisco Voice Over IP Phones (CVE-2020-3111). Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: on February 14, 2020. Hello all! affected device. Cisco Nexus 5500 Platform Switches The information in this document is intended for end users of Cisco products. The second RCE flaw (CVE-2020-3119) is a stack-overflow vulnerability that stems from the parsing of CDP packets in Cisco NX-OS, a network operating system for Cisco’s Nexus-series Ethernet switches and MDS-series Fibre Channel storage area network switches. Cisco MDS Series Switches This vulnerability affects the following Cisco products if they have Cisco Discovery Protocol enabled both globally and on at least one interface and if they are running a vulnerable release of Cisco NX-OS Software: Note: Cisco Discovery Protocol is enabled on these products by default both globally and on all interfaces. Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. The insider threat will go to jail for two years after compromising Cisco’s cloud infrastructure. (view in My Videos) “Use Serviceability Features to Troubleshoot your Cat9K as a Cisco TAC Engineer” This event took place on Tuesday 1st, December 2020 at 10hrs PDT This event provides an introduction to the main Cat9K serviceability features. The burden is on the programmer to make sure that they calculate the length correctly, with no enforcement or help from the compiler. I think the research community needs to do more in looking at these protocols. Content strives to be of the highest quality, objective and non-commercial. strcpy instead of strncpy strikes again! For information about which Cisco NX-OS Software releases are vulnerable, see the Fixed Software section of this advisory. A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. “In this vulnerability, a stack overflow in the parsing function for the Port ID, can be exploited to gain code execution on the phone,” researchers said. Cisco has not investigated whether this vulnerability affects Cisco Nexus 4000 Series Switches, Cisco Nexus 5010 Switches, or Cisco Nexus 5020 Switches because those products have reached end-of-life status. Cisco has also confirmed that this vulnerability does not affect Cisco IOS Software, Cisco IOS XE Software, or Cisco IOS XR Software. A vulnerability in the Data Management Engine (DME) of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to execute arbitrary code with administrative privileges or cause a denial of service (DoS) condition on an affected device. The vulnerability exists because the Cisco Discovery Protocol parser does not properly validate input for certain fields in a Cisco Discovery Protocol message. Configuring CDP. This advisory is available at the following link: An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an A Cisco spokesperson told Threatpost that Cisco is not aware of any “malicious uses” of the flaws in the wild. Cisco again. CDP is a Cisco proprietary Layer 2 network protocol that is used to discover information about locally attached Cisco equipment. Cisco Nexus 6000 Series Switches YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. The SMU filename follow this format: CSCvr09175-n9k_ALL-1.0.0-.lib32_n9000.rpm. Cisco Discovery Protocol (CDP) is an administrative protocol that works at Layer 2 of the Internet Protocol (IP) stack. Learn how Operational Technology and Information Technology systems are merging and changing security playbooks in this free Threatpost Webinar. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. The second RCE flaw (CVE-2020-3119) is a stack-overflow vulnerability that stems from the parsing of CDP packets in Cisco NX-OS, a network operating system for Cisco’s Nexus-series … A vulnerability in the Cisco Discovery Protocol (formerly known as CDP) subsystem of devices running, or based on, Cisco NX-OS Software contain a vulnerability that could allow an unauthenticated, adjacent attacker to create a denial of service (DoS) condition. “There are endless types of Layer 2 protocols, and CDP is one of them,” Ben Seri, vice president of research at Armis, told Threatpost. Collectively dubbed ' CDPwn,' the reported vulnerabilities reside in the various implementations of the Cisco Discovery Protocol (CDP) that comes enabled by default on virtually all Cisco devices and can not be turned OFF. Note: This vulnerability is different from the following Cisco FXOS and NX-OS Software Cisco Discovery Protocol vulnerabilities that Cisco announced on Feb. 5, 2020: Cisco FXOS, IOS XR, and NX-OS Software Cisco Discovery Protocol Denial of Service Vulnerability and Cisco NX-OS Software Cisco Discovery Protocol Remote Code Execution Vulnerability. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. ... Cisco tells Nexus … Armis has discovered five critical, zero-day vulnerabilities in various implementations of the Cisco Discovery Protocol (CDP) that can allow remote attackers to completely take over devices without any user interaction.