*** This bug is a security vulnerability ***

Public security bug reported:

On xenial:

~$ openvpn --show-tls
Available TLS Ciphers,
listed in order of preference:

TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384
TLS-ECDHE-ECDSA-WITH-AES-256-GCM-SHA384
TLS-ECDHE-RSA-WITH-AES-256-CBC-SHA384
TLS-ECDHE-ECDSA-WITH-AES-256-CBC-SHA384
TLS-ECDHE-RSA-WITH-AES-256-CBC-SHA
TLS-ECDHE-ECDSA-WITH-AES-256-CBC-SHA
TLS-SRP-SHA-DSS-WITH-AES-256-CBC-SHA
TLS-SRP-SHA-RSA-WITH-AES-256-CBC-SHA
SRP-AES-256-CBC-SHA (No IANA name known to OpenVPN, use OpenSSL name.)
DH-DSS-AES256-GCM-SHA384 (No IANA name known to OpenVPN, use OpenSSL name.)
TLS-DHE-DSS-WITH-AES-256-GCM-SHA384
DH-RSA-AES256-GCM-SHA384 (No IANA name known to OpenVPN, use OpenSSL name.)
TLS-DHE-RSA-WITH-AES-256-GCM-SHA384
TLS-DHE-RSA-WITH-AES-256-CBC-SHA256
TLS-DHE-DSS-WITH-AES-256-CBC-SHA256
DH-RSA-AES256-SHA256 (No IANA name known to OpenVPN, use OpenSSL name.)
DH-DSS-AES256-SHA256 (No IANA name known to OpenVPN, use OpenSSL name.)
TLS-DHE-RSA-WITH-AES-256-CBC-SHA
TLS-DHE-DSS-WITH-AES-256-CBC-SHA
DH-RSA-AES256-SHA (No IANA name known to OpenVPN, use OpenSSL name.)
DH-DSS-AES256-SHA (No IANA name known to OpenVPN, use OpenSSL name.)
TLS-DHE-RSA-WITH-CAMELLIA-256-CBC-SHA
TLS-DHE-DSS-WITH-CAMELLIA-256-CBC-SHA
DH-RSA-CAMELLIA256-SHA (No IANA name known to OpenVPN, use OpenSSL name.)
DH-DSS-CAMELLIA256-SHA (No IANA name known to OpenVPN, use OpenSSL name.)
TLS-ECDH-RSA-WITH-AES-256-GCM-SHA384
TLS-ECDH-ECDSA-WITH-AES-256-GCM-SHA384
TLS-ECDH-RSA-WITH-AES-256-CBC-SHA384
TLS-ECDH-ECDSA-WITH-AES-256-CBC-SHA384
TLS-ECDH-RSA-WITH-AES-256-CBC-SHA
TLS-ECDH-ECDSA-WITH-AES-256-CBC-SHA
TLS-RSA-WITH-AES-256-GCM-SHA384
TLS-RSA-WITH-AES-256-CBC-SHA256
TLS-RSA-WITH-AES-256-CBC-SHA
TLS-RSA-WITH-CAMELLIA-256-CBC-SHA
TLS-PSK-WITH-AES-256-CBC-SHA
TLS-ECDHE-RSA-WITH-AES-128-GCM-SHA256
TLS-ECDHE-ECDSA-WITH-AES-128-GCM-SHA256
TLS-ECDHE-RSA-WITH-AES-128-CBC-SHA256
TLS-ECDHE-ECDSA-WITH-AES-128-CBC-SHA256
TLS-ECDHE-RSA-WITH-AES-128-CBC-SHA
TLS-ECDHE-ECDSA-WITH-AES-128-CBC-SHA
TLS-SRP-SHA-DSS-WITH-AES-128-CBC-SHA
TLS-SRP-SHA-RSA-WITH-AES-128-CBC-SHA
SRP-AES-128-CBC-SHA (No IANA name known to OpenVPN, use OpenSSL name.)
DH-DSS-AES128-GCM-SHA256 (No IANA name known to OpenVPN, use OpenSSL name.)
TLS-DHE-DSS-WITH-AES-128-GCM-SHA256
DH-RSA-AES128-GCM-SHA256 (No IANA name known to OpenVPN, use OpenSSL name.)
TLS-DHE-RSA-WITH-AES-128-GCM-SHA256
TLS-DHE-RSA-WITH-AES-128-CBC-SHA256
TLS-DHE-DSS-WITH-AES-128-CBC-SHA256
DH-RSA-AES128-SHA256 (No IANA name known to OpenVPN, use OpenSSL name.)
DH-DSS-AES128-SHA256 (No IANA name known to OpenVPN, use OpenSSL name.)
TLS-DHE-RSA-WITH-AES-128-CBC-SHA
TLS-DHE-DSS-WITH-AES-128-CBC-SHA
DH-RSA-AES128-SHA (No IANA name known to OpenVPN, use OpenSSL name.)
DH-DSS-AES128-SHA (No IANA name known to OpenVPN, use OpenSSL name.)
TLS-DHE-RSA-WITH-SEED-CBC-SHA
TLS-DHE-DSS-WITH-SEED-CBC-SHA
TLS-DH-RSA-WITH-SEED-CBC-SHA
TLS-DH-DSS-WITH-SEED-CBC-SHA
TLS-DHE-RSA-WITH-CAMELLIA-128-CBC-SHA
TLS-DHE-DSS-WITH-CAMELLIA-128-CBC-SHA
DH-RSA-CAMELLIA128-SHA (No IANA name known to OpenVPN, use OpenSSL name.)
DH-DSS-CAMELLIA128-SHA (No IANA name known to OpenVPN, use OpenSSL name.)
TLS-ECDH-RSA-WITH-AES-128-GCM-SHA256
TLS-ECDH-ECDSA-WITH-AES-128-GCM-SHA256
TLS-ECDH-RSA-WITH-AES-128-CBC-SHA256
TLS-ECDH-ECDSA-WITH-AES-128-CBC-SHA256
TLS-ECDH-RSA-WITH-AES-128-CBC-SHA
TLS-ECDH-ECDSA-WITH-AES-128-CBC-SHA
TLS-RSA-WITH-AES-128-GCM-SHA256
TLS-RSA-WITH-AES-128-CBC-SHA256
TLS-RSA-WITH-AES-128-CBC-SHA
TLS-RSA-WITH-SEED-CBC-SHA
TLS-RSA-WITH-CAMELLIA-128-CBC-SHA
TLS-PSK-WITH-AES-128-CBC-SHA
TLS-ECDHE-RSA-WITH-RC4-128-SHA
TLS-ECDHE-ECDSA-WITH-RC4-128-SHA
TLS-ECDH-RSA-WITH-RC4-128-SHA
TLS-ECDH-ECDSA-WITH-RC4-128-SHA
TLS-RSA-WITH-RC4-128-SHA
TLS-RSA-WITH-RC4-128-MD5
TLS-PSK-WITH-RC4-128-SHA
TLS-ECDHE-RSA-WITH-3DES-EDE-CBC-SHA
TLS-ECDHE-ECDSA-WITH-3DES-EDE-CBC-SHA
TLS-SRP-SHA-DSS-WITH-3DES-EDE-CBC-SHA
TLS-SRP-SHA-RSA-WITH-3DES-EDE-CBC-SHA
SRP-3DES-EDE-CBC-SHA (No IANA name known to OpenVPN, use OpenSSL name.)
TLS-DHE-RSA-WITH-3DES-EDE-CBC-SHA
TLS-DHE-DSS-WITH-3DES-EDE-CBC-SHA
DH-RSA-DES-CBC3-SHA (No IANA name known to OpenVPN, use OpenSSL name.)
DH-DSS-DES-CBC3-SHA (No IANA name known to OpenVPN, use OpenSSL name.)
TLS-ECDH-RSA-WITH-3DES-EDE-CBC-SHA
TLS-ECDH-ECDSA-WITH-3DES-EDE-CBC-SHA
TLS-RSA-WITH-3DES-EDE-CBC-SHA
TLS-PSK-WITH-3DES-EDE-CBC-SHA


I suspect everything after the first mention of RC4 should be removed 
(inclusive of rc4, of course).

Thanks

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: openvpn 2.3.10-1ubuntu2
ProcVersionSignature: User Name 4.4.0-16.32-generic 4.4.6
Uname: Linux 4.4.0-16-generic x86_64
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
Date: Thu Apr  7 18:18:12 2016
InstallationDate: Installed on 2016-02-11 (57 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160210)
ProcEnviron:
 TERM=rxvt-unicode
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: openvpn
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: openvpn (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1567717

Title:
  openvpn supports many cipher suites that it probably shouldn't

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