Cisco Security Advisory
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CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N/E:X/RL:X/RC:X
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A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client Software could allow an authenticated, local attacker to overwrite VPN profiles on an affected device.
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. A successful exploit could allow the attacker to modify VPN profile files. To exploit this vulnerability, the attacker must have valid credentials on the affected system.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-profile-AggMUCDg
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Vulnerable Products
At the time of publication, this vulnerability affected Cisco AnyConnect Secure Mobility Client for Windows, MacOS, and Linux releases earlier than Release 4.10.00093.
See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.
Note: For Cisco AnyConnect Secure Mobility Client for Windows, this vulnerability was previously disclosed in cisco-sa-anyconnect-profile-7u3PERKF.
Products 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 Cisco AnyConnect Secure Mobility Client Software for the following Cisco platforms:
- AnyConnect Secure Mobility Client for Apple iOS
- AnyConnect Secure Mobility Client for Android
- AnyConnect Secure Mobility Client for Universal Windows Platform
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There are no workarounds that address this vulnerability.
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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.
Fixed Releases
At the time of publication, Cisco AnyConnect Secure Mobility Client for Windows, MacOS, and Linux releases 4.10.00093 and later contained the fix for this vulnerability.
See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.
To download the software from the Software Center on Cisco.com, do the following:
- Click Browse all.
- Choose Security > VPN and Endpoint Security Clients > Cisco VPN Clients > AnyConnect Secure Mobility Client > AnyConnect Secure Mobility Client v4.x.
- Choose the release from the left pane of the AnyConnect Secure Mobility Client v4.x page.
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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 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 Gerbert Roitburd of Secure Mobile Networking Lab (TU Darmstadt) for reporting this vulnerability.
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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 1.0 Initial public release. — Final 2021-MAY-05
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