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.

Multiple untrusted search path vulnerabilities in NCP Secure Enterprise Client before 9.21 Build 68, Secure Entry Client before 9.23 Build 18, and Secure Client - Juniper Edition before 9.23 Build 18 allow local users to gain privileges via a Trojan horse (1) dvccsabase002.dll, (2) conman.dll, (3) kmpapi32.dll, or (4) ncpmon2.dll file in the current working directory, as demonstrated by a directory that contains a .pcf or .spd file. NOTE: some of these details are obtained from third party information.