Sophos IPSec Client up to 11.03 Software Update access control

Summaryinfo

A vulnerability classified as critical was found in Sophos IPSec Client up to 11.03. The affected element is an unknown function of the component Software Update. Such manipulation leads to access control. This vulnerability is listed as CVE-2017-17023. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Sophos IPSec Client up to 11.03. Affected by this issue is an unknown function of the component Software Update. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The Sophos UTM VPN endpoint interacts with client software provided by NPC Engineering (www.ncp-e.com). The affected client software, "Sophos IPSec Client" 11.04 is a rebranded version of NCP "Secure Entry Client" 10.11 r32792. A vulnerability in the software update feature of the VPN client allows a man-in-the-middle (MITM) or man-on-the-side (MOTS) attacker to execute arbitrary, malicious software on a target user's computer. This is related to SIC_V11.04-64.exe (Sophos), NCP_EntryCl_Windows_x86_1004_31799.exe (NCP), and ncpmon.exe (both Sophos and NCP). The vulnerability exists because: (1) the VPN client requests update metadata over an insecure HTTP connection; and (2) the client software does not check if the software update is signed before running it.

The weakness was presented 04/09/2019 (Website). The advisory is available at ncp-e.com. This vulnerability is handled as CVE-2017-17023 since 11/27/2017. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 11.04 eliminates this vulnerability.

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Productinfo

Vendor

• Sophos

Name

• IPSec Client

Version

• 11.03

License

• commercial

Website

• Vendor: https://www.sophos.com/

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