El dijous, 18 de maig de 2017, a les 17:51:54 CEST, Carlos Garcia Campos va escriure: > Albert Astals Cid <[email protected]> writes: > > El dimarts, 16 de maig de 2017, a les 19:40:31 CEST, [email protected] > > va> > > escriure: > >> Hey List, > >> > >> very recently, Thalos(CISCO) has encountered some overflows that could > >> potentially lead to security risks. One of this is in the DCT decoder and > >> the other in the JPX decoder. The question is what to do? Do we fix these > >> overflows or just remove the decoders from poppler since they are not > >> being > >> mantained. One of the problems is that Ubuntu is compiled by default to > >> use > >> the JPX decoder while most distributions do include libjpeg support. > >> > >> The bugs as I understand are still private, so if any of the developers > >> of > >> poppler wants to see the reports, please contact me directly (off list) > >> and > >> I will send it to you together with a minimal pdf sample. > > > > Right now we "almost silently" fall back to the unsupported code, yes we > > put a warning at the very end of the configure/cmake process but i guess > > hardly anyone reads those. > > > > My suggestion would be change the configure/cmake process so it behaves > > like this (process explained for libjpeg but same would apply for > > libopenjpeg)> > > * You have libjpeg -> all is good > > * You don't have it, configure fails > > > > * Unless you pass one of these two options > > > > * --dct-decoder=unmaintained > > * --dct-decoder=none > > > > Which would give you either the unmaintained decoder or none at all. > > Sounds good to me.
Ok, will try to work on a patch. If someone has time, please beat me to it :) Cheers, Albert > > > At least this way we can totally pass the blame for distros for using > > either the unmaintained or the none flags. > > > > I am suggesting this instead of removing it because for some controlled > > reasons it may be actually better to be able to use the unmaintained > > decoders than nothing (e.g. you're running pdftotext inside a virtual > > machine, doesn't matter if you get "rooted" inside the virtual machine). > > > > Cheers, > > > > Albert > >> > >> Kind regards > >> > >> José > > > > _______________________________________________ > > poppler mailing list > > [email protected] > > https://lists.freedesktop.org/mailman/listinfo/poppler _______________________________________________ poppler mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/poppler
