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AUSCERT External Security Bulletin Redistribution
ESB-2021.0329.4
Sudo Privilege Escalation Vulnerability Affecting Cisco
Products: January 2021
22 February 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Products
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Existing Account
Resolution: None
CVE Names: CVE-2021-3156
Reference: ASB-2021.0036
ESB-2021.0313
ESB-2021.0307
ESB-2021.0306
ESB-2021.0295
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sudo-privesc-jan2021-qnYQfcM
Revision History: February 22 2021: Updated the lists of products under investigation, vulnerable products,
and products confirmed not vulnerable
February 9 2021: Vendor updated vulnerable product list and fix details
February 2 2021: Vendor added multiple vulnerable products to advisory
February 1 2021: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
Sudo Privilege Escalation Vulnerability Affecting Cisco Products: January 2021
Priority: High
Advisory ID: cisco-sa-sudo-privesc-jan2021-qnYQfcM
First Published: 2021 January 29 21:30 GMT
Last Updated: 2021 February 19 20:40 GMT
Version 1.10: Interim
Workarounds: No workarounds available
CVE Names: CVE-2021-3156
CWEs: CWE-122
Summary
o 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://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sudo-privesc-jan2021-qnYQfcM
Affected Products
o Cisco is investigating its product line to determine which products may be
affected by this vulnerability. As the investigation progresses, Cisco will
update this advisory with information about affected products.
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.
Products Under Investigation
The following products are under active investigation to determine whether
they are affected by the vulnerability that is described in this advisory:
Network Management and Provisioning
Cisco Connected Mobile Experiences
Unified Computing
Cisco UCS Director
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 Application Policy Infrastructure Controller (APIC) CSCvx18707 3.2.10 (Feb 2021)
4.2.7 (Mar 2021)
5.1.4 (Mar 2021)
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 9.3.7 (Feb 2021) 10.1.1 (Available)
Cisco Nexus 7000 Series Switches CSCvx18709 8.4.4 (Feb 21)
Cisco Nexus 9000 Series Switches in standalone NX-OS mode CSCvx18710 9.3.7 (Feb 2021) 10.1.1 (Available)
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 (Feb 2021) See the bug for 2.8 update information.
Cisco Ultra Cloud CSCvx21182 2020.02.1.i33 (Mar 2021)
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 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
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
Workarounds
o Any workarounds will be documented in the product-specific Cisco bugs,
which are identified in the Vulnerable Products section of this advisory.
Fixed Software
o 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.
Exploitation and Public Announcements
o The Cisco Product Security Incident Response Team (PSIRT) is not aware of
any malicious use of the vulnerability that is described in this advisory.
Source
o On January 26th, the Qualys Research Team disclosed the vulnerability in a
public advisory.
Cisco Security Vulnerability Policy
o 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.
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sudo-privesc-jan2021-qnYQfcM
Revision History
o +---------+--------------------------+------------+---------+-------------+
| Version | Description | Section | Status | Date |
+---------+--------------------------+------------+---------+-------------+
| | | Affected | | |
| | Updated the lists of | Products, | | |
| | products under | Vulnerable | | |
| 1.10 | investigation, | Products, | Interim | 2021-FEB-19 |
| | vulnerable products, and | Products | | |
| | products confirmed not | Confirmed | | |
| | vulnerable. | Not | | |
| | | Vulnerable | | |
+---------+--------------------------+------------+---------+-------------+
| | | Affected | | |
| | Updated the lists of | Products, | | |
| | products under | Vulnerable | | |
| 1.9 | investigation, | Products, | Interim | 2021-FEB-16 |
| | vulnerable products, and | Products | | |
| | products confirmed not | Confirmed | | |
| | vulnerable. | Not | | |
| | | Vulnerable | | |
+---------+--------------------------+------------+---------+-------------+
| | | Affected | | |
| | Updated the lists of | Products, | | |
| | products under | Vulnerable | | |
| 1.8 | investigation, | Products, | Interim | 2021-FEB-11 |
| | vulnerable products, and | Products | | |
| | products confirmed not | Confirmed | | |
| | vulnerable. | Not | | |
| | | Vulnerable | | |
+---------+--------------------------+------------+---------+-------------+
| | Updated the lists of | | | |
| | products under | | | |
| | investigation, | | | |
| | vulnerable products, and | Affected | | |
| | products confirmed not | Products, | | |
| | vulnerable. Note that | Vulnerable | | |
| 1.7 | Cisco has confirmed that | Products, | Interim | 2021-FEB-10 |
| | Cisco Firepower Threat | Products | | |
| | Defense (FTD) is not | Confirmed | | |
| | affected by this | Not | | |
| | vulnerability. It was | Vulnerable | | |
| | incorrectly listed as | | | |
| | vulnerable in a previous | | | |
| | version of the advisory. | | | |
+---------+--------------------------+------------+---------+-------------+
| | Updated the lists of | Affected | | |
| 1.6 | products under | Products, | Interim | 2021-FEB-08 |
| | investigation and | Vulnerable | | |
| | vulnerable products. | Products | | |
+---------+--------------------------+------------+---------+-------------+
| | | Affected | | |
| | Updated the lists of | Products, | | |
| | products under | Vulnerable | | |
| 1.5 | investigation, | Products, | Interim | 2021-FEB-05 |
| | vulnerable products, and | Products | | |
| | products confirmed not | Confirmed | | |
| | vulnerable. | Not | | |
| | | Vulnerable | | |
+---------+--------------------------+------------+---------+-------------+
| | Updated the lists of | | | |
| | products under | | | |
| | investigation, | | | |
| | vulnerable products, and | | | |
| | products confirmed not | | | |
| | vulnerable. Note that | Affected | | |
| | Cisco Virtual Topology | Products, | | |
| | System (formerly Cisco | Vulnerable | | |
| | Virtual Systems | Products, | | |
| 1.4 | Operations Center) - | Products | Interim | 2021-FEB-04 |
| | VTSR VM was incorrectly | Confirmed | | |
| | listed as vulnerable in | Not | | |
| | a previous version of | Vulnerable | | |
| | the advisory; this has | | | |
| | been corrected because | | | |
| | Cisco has determined | | | |
| | that this product is not | | | |
| | affected by this | | | |
| | vulnerability. | | | |
+---------+--------------------------+------------+---------+-------------+
| | | Affected | | |
| | Updated the lists of | Products, | | |
| | products under | Vulnerable | | |
| 1.3 | investigation, | Products, | Interim | 2021-FEB-03 |
| | vulnerable products, and | Products | | |
| | products confirmed not | Confirmed | | |
| | vulnerable. | Not | | |
| | | Vulnerable | | |
+---------+--------------------------+------------+---------+-------------+
| | Updated the lists of | | | |
| | products under | | | |
| | investigation, | | | |
| | vulnerable products, and | Affected | | |
| | products confirmed not | Products, | | |
| | vulnerable. Note that | Vulnerable | | |
| | Cisco FXOS Software was | Products, | | |
| 1.2 | incorrectly listed as | Products | Interim | 2021-FEB-02 |
| | vulnerable in a previous | Confirmed | | |
| | version of the advisory; | Not | | |
| | this has been corrected | Vulnerable | | |
| | because Cisco has | | | |
| | determined that this | | | |
| | product is not affected | | | |
| | by this vulnerability. | | | |
+---------+--------------------------+------------+---------+-------------+
| | | Affected | | |
| | Updated the lists of | Products, | | |
| | products under | Vulnerable | | |
| 1.1 | investigation, | Products, | Interim | 2021-FEB-02 |
| | vulnerable products, and | Products | | |
| | products confirmed not | Confirmed | | |
| | vulnerable. | Not | | |
| | | Vulnerable | | |
+---------+--------------------------+------------+---------+-------------+
| 1.0 | Initial public release. | - | Interim | 2021-JAN-29 |
+---------+--------------------------+------------+---------+-------------+
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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
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On call after hours for member emergencies only.
===========================================================================
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