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G'day, After talking to some people, they confirm it is known, but what is the point of -r'ing binaries it if it can be read? While it may not be a direct security threat, being able to look inside an otherwise unreadable binary can be a problem, for example, seeing if it is working or not, or possibly got entries for format strings. Also some programs have a secret value inside them they use for authenication with remote clients. (Possibly Q by mixter @ mixter.warrior2k.com rings a bell). While I guess there is no standard for ptrace, what do the other operating systems do? I've been told freebsd won't allow you to ptrace() a non-readable binary, but unable to confirm it myself. On Monday, February 04, 2002 at 10:06:28 PM, Daniel Jacobowitz wrote: > On Tue, Feb 05, 2002 at 11:33:32AM +1100, Andrew Griffiths wrote: > > For those who want some demo code, you can find it at http://203.39.161.186/readbin.tgz. >> > I think this is just 'known'. Note that it isn't a security problem > otherwise; you'll find that the setuid application does not setuid if > it is ptraced. On 2.4.17 at least. > > -- www.tasmail.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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