OpenVPN version 2.1.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows attackers via an off-by-one buffer write in the NTLM proxy authentication to potentially cause a crash via a crafted NTLM response from a malicious proxy server
Exploitability
AV:NAC:HAT:PPR:NUI:PVulnerable System
VC:NVI:NVA:HSubsequent System
SC:NSI:NSA:H7/CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:HMemory Safety