CVE:CVE-2012-5356
CNNVD:CNNVD-201210-179
Ubuntu是英国科能（Canonical）公司和Ubuntu基金会共同开发的一套以桌面应用为主的GNU/Linux操作系统。
Ubuntu Software Properties 0.75.10.3之前的0.75.x版本、0.80.9.2之前的0.80.x版本、0.81.13.5之前的0.81.x版本、0.82.7.3之前的0.82.x版本、以及0.92.8之前的0.92.x版本中的apt-add-repository工具中存在漏洞。该漏洞源于程序未正确地核对从公钥服务器输入的PPA GPG密钥。通过实施中间人攻击，远程攻击者可利用该漏洞安装任意打包存贮的GPG密钥。
solution:Upgrade canonical ubuntu_software_properties to a higher version than 0.75.4,0.75.5,0.75.6,0.75.7,0.75.8,0.75.9,0.75.10,0.75.10.1,0.75.10.2,0.80,0.80.2,0.80.3,0.80.4,0.80.5,0.80.6,0.80.7,0.80.8,0.80.9,0.80.9.1,0.81,0.81.1,0.81.2,0.81.3,0.81.4,0.81.5,0.81.6,0.81.7,0.81.8,0.81.9,0.81.10,0.81.11,0.81.13,0.81.13.1,0.81.13.2,0.81.13.3,0.81.13.4,0.82,0.82.2,0.82.3,0.82.4,0.82.5,0.82.6,0.82.7,0.82.7.1,0.82.7.2,0.92,0.92.2,0.92.3,0.92.4,0.92.5,0.92.6,0.92.7,and avoid the version 0.75.4,0.75.5,0.75.6,0.75.7,0.75.8,0.75.9,0.75.10,0.75.10.1,0.75.10.2,0.80,0.80.2,0.80.3,0.80.4,0.80.5,0.80.6,0.80.7,0.80.8,0.80.9,0.80.9.1,0.81,0.81.1,0.81.2,0.81.3,0.81.4,0.81.5,0.81.6,0.81.7,0.81.8,0.81.9,0.81.10,0.81.11,0.81.13,0.81.13.1,0.81.13.2,0.81.13.3,0.81.13.4,0.82,0.82.2,0.82.3,0.82.4,0.82.5,0.82.6,0.82.7,0.82.7.1,0.82.7.2,0.92,0.92.2,0.92.3,0.92.4,0.92.5,0.92.6,0.92.7