Messages in this thread | | | Date | Tue, 27 Mar 2001 21:50:41 -0800 | From | Ben Ford <> | Subject | Re: Disturbing news.. |
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Jesse Pollard wrote:
> On Wed, 28 Mar 2001, Shawn Starr wrote: > >> Well, why can't the ELF loader module/kernel detect or have some sort of >> restriction on modifying other/ELF binaries including itself from changing >> the Entry point? >> >> There has to be a way stop this. WHY would anyone want to modify the entry >> point anyway? (there may be some reasons but I really dont know what). >> Even if it's user level, this cant affect files with root permissions >> (unless root is running them or suid). >> >> Any idea? > > > Sure - very simple. If the execute bit is set on a file, don't allow > ANY write to the file. This does modify the permission bits slightly > but I don't think it is an unreasonable thing to have. > What a pain in the ass when you are writing / updating a shell script . . . .
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