Cisco Security Advisory
Sudo Privilege Escalation Vulnerability Affecting Cisco Products: January 2021
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A vulnerability in the command line parameter parsing code of Sudo could allow an authenticated, local attacker to execute commands or binaries with root privileges.
The vulnerability is due to improper parsing of command line parameters that may result in a heap-based buffer overflow. An attacker could exploit this vulnerability by accessing a Unix shell on an affected device and then invoking the sudoedit command with crafted parameters or by executing a binary exploit. A successful exploit could allow the attacker to execute commands or binaries with root privileges.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sudo-privesc-jan2021-qnYQfcM
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Cisco investigated its product line to determine which products and services may be affected by this vulnerability.
The Vulnerable Products section includes Cisco bug IDs for each affected product. The bugs are accessible through the Cisco Bug Search Tool and contain additional platform-specific information, including workarounds (if available) and fixed software releases.
Vulnerable Products
The following table lists Cisco products that are affected by the vulnerability that is described in this advisory. If a future release date is indicated for software, the date provided represents an estimate based on all information known to Cisco as of the Last Updated date at the top of the advisory. Availability dates are subject to change based on a number of factors, including satisfactory testing results and delivery of other priority features and fixes. If no version or date is listed for an affected component (indicated by a blank field and/or an advisory designation of Interim), Cisco is continuing to evaluate the fix and will update the advisory as additional information becomes available. After the advisory is marked Final, customers should refer to the associated Cisco bug(s) for further details. Unless otherwise documented, all software releases prior to the first fixed release are to be considered affected by this vulnerability.
Product Cisco Bug ID Fixed Release Availability Network Management and Provisioning Cisco Elastic Services Controller (ESC) CSCvx18712 ESC-5.4.0.86 (Available) Cisco Prime Collaboration Provisioning CSCvx18714 12.6.SU3 (Apr 2021) Cisco Prime Service Catalog Virtual Appliance CSCvx18724 See the bug for update information. Cisco Smart Net Total Care - On-Premises CSCvx18702 2.1.0.1 (Mar 2021) Cisco Smart Software Manager On-Prem CSCvx22363 8-202102 (Mar 2021) Routing and Switching - Enterprise and Service Provider Cisco Nexus 3000 Series Switches CSCvx18710 7.0(3)I7(9) (Available)1
9.3.7 (Available)
10.1.1 (Available)Cisco Nexus 7000 Series Switches CSCvx18709 8.4.4 (Available) Cisco Nexus 9000 Series Switches in standalone NX-OS mode CSCvx18710 7.0(3)I7(9) (Available)1
9.3.7 (Available)
10.1.1 (Available)Cisco Redundancy and Configuration Manager (for 4G/5G
StarOS UserPlane)CSCvx19139 21.23.0 (Mar 2021)
21.22.uax (Apr 2021)Unified Computing Cisco UCS Director CSCvx18705 6.8 (Mar 2021) Voice and Unified Communications Devices Cisco Paging Server (InformaCast) CSCvx18737 12.22.1 (Mar 2021)
14.0.1 (Mar 2021)Cisco Cloud Hosted Services Cisco Common Services Platform Collector CSCvx20991 2.9.0.2 (Available)
See the bug for 2.8 update information.Cisco CX Cloud Agent Software CSCvx49685 1.3 (Available) Cisco Ultra Cloud CSCvx21182 2020.02.1.i33 (Mar 2021) 1. See the bug for additional operations that may be required to fully address this vulnerability.
Products Confirmed Not Vulnerable
Only products and services listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability.
Products that do not offer the capability for users to access an interactive terminal or to execute custom binaries in the context of the underlying Unix operating system or of a guest Unix operating system do not present an attack vector for the exploitation of this vulnerability and therefore are not considered vulnerable.
Cisco has confirmed that this vulnerability does not affect the following products and services:
Collaboration and Social Media
- Cisco Webex Meetings Server
Endpoint Clients and Client Software
- Cisco Jabber Guest
Network and Content Security Devices
- Cisco Adaptive Security Appliance (ASA) Software
- Cisco FXOS Software
- Cisco Firepower Threat Defense (FTD)
- Cisco Identity Services Engine (ISE)
Network Management and Provisioning
- Cisco Application Policy Infrastructure Controller (APIC)
- Cisco Connected Mobile Experiences
- Cisco Data Center Network Manager (DCNM)
- Cisco Evolved Programmable Network Manager
- Cisco Policy Suite
- Cisco Prime Access Registrar
- Cisco Prime Infrastructure
- Cisco Prime Network Change and Configuration Management
- Cisco Virtual Topology System (formerly Cisco Virtual Systems Operations Center) - VTSR VM
- Cisco Virtualized Infrastructure Manager (VIM)
Routing and Switching - Enterprise and Service Provider
- Cisco 8000 Series Routers
- Cisco ASR 5000 Series
- Cisco ASR 9000 Aggregation Services Routers Series
- Cisco Carrier Routing System (CRS)
- Cisco Connected Grid Routers
- Cisco DNA Center
- Cisco IOS XRv 9000 Router
- Cisco IOS and IOS XE Software
- Cisco MDS 9000 Series Multilayer Switches
- Cisco Network Convergence System (NCS) 540 Series Routers
- Cisco Network Convergence System (NCS) 560 Series Routers
- Cisco Network Convergence System (NCS) 1000 Series
- Cisco Network Convergence System (NCS) 4000 Series
- Cisco Network Convergence System (NCS) 5000 Series
- Cisco Network Convergence System (NCS) 5500 Series
- Cisco Network Convergence System (NCS) 6000 Series Routers
- Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode
- Cisco ONS 15454 Series Multiservice Provisioning Platforms
- Cisco SD-WAN vManage
- Cisco Stealthwatch Endpoint Concentrator
- Cisco Stealthwatch Flow Collector NetFlow
- Cisco Stealthwatch Flow Collector sFlow
- Cisco Stealthwatch Flow Sensor
- Cisco Stealthwatch Management Console (SMC)
- Cisco Stealthwatch UDP Director
- Cisco Virtual Packet Core
Unified Computing
- Cisco Enterprise NFV Infrastructure Software (NFVIS)
Voice and Unified Communications Devices
- Cisco ATA 190 Analog Telephone Adapter
- Cisco SPA112 2-Port Phone Adapter
- Cisco SPA122 Analog Telephone Adapter (ATA) with Router
- Cisco SPA232D Multi-Line DECT Analog Telephone Adapter (ATA)
Video, Streaming, TelePresence, and Transcoding Devices
- Cisco Expressway Series
- Cisco TelePresence Video Communication Server (VCS)
- Cisco Video Surveillance Media Server
Wireless
- Cisco Mobility Services Engine
Cisco Cloud Hosted Services
- Cisco Jasper Control Center
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Any workarounds will be documented in the product-specific Cisco bugs, which are identified in the Vulnerable Products section of this advisory.
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For information about fixed software releases, consult the Cisco bugs identified in the Vulnerable Products section of this advisory.
When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page, to determine exposure and a complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.
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The Cisco Product Security Incident Response Team (PSIRT) is not aware of any malicious use of the vulnerability that is described in this advisory.
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On January 26th, the Qualys Research Team disclosed the vulnerability in a public advisory.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessVersion Description Section Status Date 1.15 Updated the list of vulnerable products. Vulnerable Products Final 2021-MAR-16 1.14 Updated the lists of vulnerable products and products confirmed not vulnerable. Vulnerable Products, Products Confirmed Not Vulnerable Interim 2021-MAR-11 1.13 Updated the list of vulnerable products. Vulnerable Products Interim 2021-MAR-02 1.12 Updated the lists of vulnerable products and products confirmed not vulnerable. Removed references to ongoing investigation. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2021-FEB-25 1.11 Updated the lists of products under investigation, vulnerable products, and products confirmed not vulnerable. Note that upon further investigation Cisco has confirmed that Cisco Application Policy Infrastructure Controller (APIC) is not affected by this vulnerability. It was incorrectly listed as vulnerable in a previous version of the advisory. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2021-FEB-22 1.10 Updated the lists of products under investigation, vulnerable products, and products confirmed not vulnerable. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2021-FEB-19 1.9 Updated the lists of products under investigation, vulnerable products, and products confirmed not vulnerable. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2021-FEB-16 1.8 Updated the lists of products under investigation, vulnerable products, and products confirmed not vulnerable. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2021-FEB-11 1.7 Updated the lists of products under investigation, vulnerable products, and products confirmed not vulnerable. Note that Cisco has confirmed that Cisco Firepower Threat Defense (FTD) is not affected by this vulnerability. It was incorrectly listed as vulnerable in a previous version of the advisory. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2021-FEB-10 1.6 Updated the lists of products under investigation and vulnerable products. Affected Products, Vulnerable Products Interim 2021-FEB-08 1.5 Updated the lists of products under investigation, vulnerable products, and products confirmed not vulnerable. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2021-FEB-05 1.4 Updated the lists of products under investigation, vulnerable products, and products confirmed not vulnerable. Note that Cisco Virtual Topology System (formerly Cisco Virtual Systems Operations Center) - VTSR VM was incorrectly listed as vulnerable in a previous version of the advisory; this has been corrected because Cisco has determined that this product is not affected by this vulnerability. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2021-FEB-04 1.3 Updated the lists of products under investigation, vulnerable products, and products confirmed not vulnerable. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2021-FEB-03 1.2 Updated the lists of products under investigation, vulnerable products, and products confirmed not vulnerable. Note that Cisco FXOS Software was incorrectly listed as vulnerable in a previous version of the advisory; this has been corrected because Cisco has determined that this product is not affected by this vulnerability. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2021-FEB-02 1.1 Updated the lists of products under investigation, vulnerable products, and products confirmed not vulnerable. Affected Products, Vulnerable Products, Products Confirmed Not Vulnerable Interim 2021-FEB-02 1.0 Initial public release. - Interim 2021-JAN-29
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