踩坑 GNU Wget缓冲区错误漏洞，完全懵逼。
问题描述
登录阿里云，看到醒目的红色警报，点开是主机上存在漏洞： GNU Wget缓冲区错误漏洞，给到的参考链接: securitytracker.com显示要升级到版本1.19.2。
升级过程中，遇到了点问题，Google后解决，记录下整个升级步骤。
具体步骤
查看版本
wget -V
显示是GNU Wget 1.17.1 built on linux-gnu.
删掉旧版本：
apt-get remove wget
安装1.19.2或者更高版本，见http://ftp.gnu.org/gnu/wget/， 目前最新版本是1.19.4
wget http://ftp.gnu.org/gnu/wget/wget-1.19.4.tar.gz
tar -zxvf wget-1.19.4.tar.gz
cd wget-1.19.4
./configure --with-ssl=openssl
执行完./configure 后报错：
configure: error: The pkg-config script could not be found or is too old. Make sure it
is in your PATH or set the PKG_CONFIG environment variable to the full
path to pkg-config.
Alternatively, you may set the environment variables XMEDCON_GLIB_CFLAGS
and XMEDCON_GLIB_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.
装pkg-config:
apt-get install -y pkg-config
再次执行：
./configure --with-ssl=openssl
成功的话，会发现最后生成了Makefile：
config.status: creating Makefile
config.status: creating src/Makefile
config.status: creating doc/Makefile
config.status: creating util/Makefile
config.status: creating po/Makefile.in
config.status: creating tests/Makefile
config.status: creating lib/Makefile
config.status: creating testenv/Makefile
config.status: creating tests/certs/interca.conf
config.status: creating tests/certs/rootca.conf
config.status: creating src/config.h
config.status: executing depfiles commands
config.status: executing po-directories commands
config.status: creating po/POTFILES
config.status: creating po/Makefile
此时，执行：
make && make install
查看版本：
wget -V
显示：
GNU Wget 1.19.4 built on linux-gnu.
OK!