| Description |
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A pre-authentication remote crash/information disclosure vulnerability has been discovered in OpenVPN < 2.4.3. If the client uses a HTTP proxy with NTLM authentication (i.e. "--http-proxy <server> <port> [<authfile>|'auto'|'auto-nct'] ntlm2") to connect to the OpenVPN server, an attacker in position of man-in-the-middle between the client and the proxy can cause the client to crash or disclose at most 96 bytes of stack memory. The disclosed stack memory is likely to contain the proxy password. |
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