CVE:CVE-2012-6656
CNNVD:CNNVD-201409-045
GNU C Library（又名glibc，libc6）是一种按照LGPL许可协议发布的开源免费的C语言编译程序。
GNU C Library 2.16及之前版本的iconvdata/ibm930.c文件中存在安全漏洞，该漏洞源于程序将IBM930编码的数据转换成UTF-8时，‘iconv’函数没有充分过滤多字节字符‘0xffff’。攻击者可利用该漏洞造成拒绝服务（越边界读取）。
solution:Upgrade debian debian_linux to a higher version than 7.0,and avoid the version 7.0; Upgrade canonical ubuntu_linux to a higher version than 10.04,12.04,14.04,14.10,and avoid the version 10.04,12.04,14.04,14.10; Upgrade gnu glibc to a higher version than 2.16,and avoid the version (,2.16]