Hi Robin, I can't really answer your questions about what you should do, but I wanted to provide a link that shows why httpd_user_script_t is not transitioning to sendmail_t. http://danwalsh.livejournal.com/23944.html Jason On Fri, Sep 2, 2011 at 1:33 PM, Robin Lee Powell <rlpowell@xxxxxxxxxxxxxxxxxx> wrote: > > (Background: My SELinux hosts are all F15, fairly base installation, > with the unconfined module disabled) > > I have a host that is for random hackery, and hence is (or at least > is allowed to be) less secure than the others. > > I have a user who made a CGI (running under apache; python, in case > that matters) that pulls things from elsewhere on the web and then > sends email with the results. > > This generates a pretty large number of AVC denials, which I suppose > is reasonable since that behaviour looks an awful lot like "I just > got hijacked and am now being used for spam distribution". > > One thing I was genuinely surprised by though is that the > mail-related denials all came in for httpd_user_script_t , rather > than sendmail_t or something, and that no attempt to transition to > sendmail_t seems to have occured or been denied or anything, as I'd > have expected (it sends mail with /bin/mail ). > > FWIW, here's the AVCs: > > http://fpaste.org/ZyHg/ (uses date from the input form only) > > http://fpaste.org/M9Fq/ (goes out and talks to another website) > > I've learned a lot about SELinux recently, but it's all been > piecemeal, so this is more of a "what's the right thing?" question > designed to for me to learn from more than "what's the fastest way > to fix this?". > > So, what's the right way to handle this situation? > > httpd_user_script_exec_t doesn't do the trick at all (which is > probably good since it turns out user_u can set that with chcon, > which I didn't expect). > > Is there some way without installing a module (i.e. with semanage or > similar) to indicate to SELinux "Yeah, this script over here? It > can talk to the web" (or "send email")? > > Is there a way to indicate that system-wide without installing a > module? (not that I would, just curious) > > If doing it via module, it's best to create a bobs_script_exec_t and > bobs_script_t and do everything for those types, rather than > httpd_user_script_exec_t and friends, right? This means that a user > making a non-trivial CGI has to come talk to me, which is a tad > unfortunate but not horrible. > > Thanks for all enlightenment here, and please feel free to go the > "you're thinking about it wrong" route; I'm really wanting to learn. > > -Robin > > -- > http://singinst.org/ : Our last, best hope for a fantastic future. > Lojban (http://www.lojban.org/): The language in which "this parrot > is dead" is "ti poi spitaki cu morsi", but "this sentence is false" > is "na nei". My personal page: http://www.digitalkingdom.org/rlp/ > -- > selinux mailing list > selinux@xxxxxxxxxxxxxxxxxxxxxxx > https://admin.fedoraproject.org/mailman/listinfo/selinux > -- selinux mailing list selinux@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/selinux
