CVE:CVE-2007-2243
CNNVD:CNNVD-200704-479
当ChallengeResponseAuthentication被启用时，OpenSSH允许远程攻击者借助S/KEY，试图进行鉴别，从而决定用户帐户的位置。如果用户帐户存在的话，这会显示不同的响应。
solution:Upgrade openbsd openssh to a higher version than 1.2,1.2.1,1.2.2,1.2.3,1.2.27,2.1,2.1.1,2.2,2.3,2.5,2.5.1,2.5.2,2.9,2.9.9,2.9.9p2,2.9p1,2.9p2,3.0,3.0.1,3.0.1p1,3.0.2,3.0.2p1,3.0p1,3.1,3.1p1,3.2,3.2.2,3.2.2p1,3.2.3p1,3.3,3.3p1,3.4,3.4p1,3.5,3.5p1,3.6,3.6.1,3.6.1p1,3.6.1p2,3.7,3.7.1,3.7.1p1,3.7.1p2,3.8,3.8.1,3.8.1p1,3.9,3.9.1,3.9.1p1,4.0,4.0p1,4.1,4.1p1,4.2,4.2p1,4.3,4.3p1,4.3p2,4.4,4.4p1,4.5,4.6,and avoid the version 1.2,1.2.1,1.2.2,1.2.3,1.2.27,2.1,2.1.1,2.2,2.3,2.5,2.5.1,2.5.2,2.9,2.9.9,2.9.9p2,2.9p1,2.9p2,3.0,3.0.1,3.0.1p1,3.0.2,3.0.2p1,3.0p1,3.1,3.1p1,3.2,3.2.2,3.2.2p1,3.2.3p1,3.3,3.3p1,3.4,3.4p1,3.5,3.5p1,3.6,3.6.1,3.6.1p1,3.6.1p2,3.7,3.7.1,3.7.1p1,3.7.1p2,3.8,3.8.1,3.8.1p1,3.9,3.9.1,3.9.1p1,4.0,4.0p1,4.1,4.1p1,4.2,4.2p1,4.3,4.3p1,4.3p2,4.4,4.4p1,4.5,4.6