Ubuntu 20.04: 2020:1234-2 Critical: wpa_supplicant Security Vulnerabilities

This update for openvpn fixes the following issues:

- Some parts of the certificate-parsing code did not always clear all

allocated memory. This would have allowed clients to leak a few bytes of

memory for each connection attempt, thereby facilitating a (quite

inefficient) DoS attack on the server. [bsc#1044947, CVE-2017-7521]

- The ASN1 parsing code contained a bug that could have resulted in some

buffers being free()d twice, and this issue could have potentially been

triggered remotely by a VPN peer. [bsc#1044947, CVE-2017-7521]

- If clients used a HTTP proxy with NTLM authentication, a

man-in-the-middle attacker between client and proxy could cause the

client to crash or disclose at most 96 bytes of stack memory. The

disclosed stack memory was likely to contain the proxy password. If the

proxy password had not been reused, this was unlikely to compromise the

security of the OpenVPN tunnel itself. Clients who did not...