Cisco Security Advisory
Lasso SAML Implementation Vulnerability Affecting Cisco Products: June 2021
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CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
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On June 1, 2021, Lasso disclosed a security vulnerability in the Lasso Security Assertion Markup Language (SAML) Single Sign-On (SSO) library. This vulnerability could allow an authenticated attacker to impersonate another authorized user when interacting with an application.
For a description of this vulnerability, see lasso.git NEWS.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-lasso-saml-jun2021-DOXNRLkD
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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.
Product Cisco Bug ID Fixed Release Availability Network and Content Security Devices Cisco Adaptive Security Appliance (ASA) Software
Affected features: Clientless WebVPN and AnyConnect VPN (only when SSO is enabled)CSCvx73164 9.8.4.39 (available)
9.12.4.24 (available)
9.14.3 (available)
9.15.1.15 (available)
9.16.1.3 (available)Cisco Content Security Management Appliance (SMA)
Affected feature: Web-based management interface (only when SSO is enabled)CSCvx73156 13.8.1-074 (available)
14.0.0-404 (available)Cisco Email Security Appliance (ESA)
Affected feature: Web-based management interface (only when SSO is enabled)CSCvx73154 14.0.0-692 GD (available) Cisco FXOS Software CSCvx73164 2.2.2.149 (available)
2.3.1.216 (available)
2.6.1.230 (available)
2.7.1.143 (available)
2.8.1.152 (available)
2.9.1.143 (available)Cisco Web Security Appliance (WSA)
CSCvx73157 14.0.1-053 (available) Cisco Firepower Threat Defense (FTD) Software
Affected feature: AnyConnect VPN (only when SSO is enabled)1CSCvx73164 6.4.0.12 (available)
6.6.5 (available)
6.7.0.2 (available)
7.0.0 (available)Network Management and Provisioning Cisco Prime Collaboration Assurance CSCvx73162 None planned 1. The AnyConnect VPN is configurable only through FlexConfig for Cisco FTD releases earlier than Release 6.7.The Cisco software releases listed in the following table have reached end of software maintenance. Customers are advised to migrate to a supported release that includes the fix for this vulnerability.
Cisco Software End-of-Life Releases ASA Software 9.7 and earlier
9.9
9.10
9.13FXOS Software 2.4.1
2.7.1FTD Software 6.0.1 and earlier
6.2.0
6.2.1
6.5Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability.
Cisco has confirmed that this vulnerability does not affect the following products and services:
Network and Content Security Devices
- Cisco AMP Virtual Private Cloud Appliance
Network Management and Provisioning
- Cisco Prime Collaboration Provisioning
Unified Computing
- Cisco UCS B-Series M5 Blade Servers
- Cisco UCS C-Series M5 Rack Servers - Managed
Video, Streaming, TelePresence, and Transcoding Devices
- Cisco Video Surveillance Media Server
- Cisco Video Surveillance Operations Manager
- Cisco Vision Dynamic Signage Director
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There are no workarounds that address this vulnerability.
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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.
The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.
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The Cisco Product Security Incident Response Team (PSIRT) is aware that proof-of-concept exploit code is available for the vulnerability that is described in this advisory.
The Cisco PSIRT is not aware of any malicious use of the vulnerability that is described in this advisory.
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Cisco would like to thank the Best Buy Enterprise Information Protection team and Sam Tinklenberg for discovering this vulnerability.
Cisco would also like to thank Akamai for bringing this vulnerability to our attention and working with us on it.
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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 1.4 Updated the advisory throughout to reflect that the investigation is complete. Updated fixed release availability information. Multiple sections Final 2021-SEP-30 1.3 Updated ASA fixed release availability. Vulnerable Products Interim 2021-JUN-15 1.2 Updated FTD feature impact. Vulnerable Products Interim 2021-JUN-09 1.1 Updated availability of first fixed releases for Cisco FXOS Software. Vulnerable Products Interim 2021-JUN-01 1.0 Initial public release. - Interim 2021-JUN-01
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