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Re: Linux kernel scm_send local DoS
From: even multiplexed <Shadow333 () gmx at>
Date: Wed, 15 Dec 2004 13:52:22 +0100

Paul Starzetz wrote:

On Wed, 15 Dec 2004, even multiplexed wrote:

attention.i just wanted to ask if anyone has a tip for me how to quickfix this bug, without actually rebuilding a patched version of the kernel.

I don't think this is practicable, since the bugs reside in deep kernel functions. You can not fix it just by disabling a particular syscall. You have patch a running kernel binary, maybe someone comes up with this kind of utlility.

well, i was also examining the igmp exploit you posted earlier, that one was relatively easy to disable, by setting the following sysctl vars:

net.ipv4.igmp_max_msf = 0
net.ipv4.igmp_max_memberships = 0
net.ipv4.icmp_ignore_bogus_error_responses = 1

since i dont really need igmp support on that server=)

its just that scm_send thing, that i didnt find any config option for...
so i guess that means either waiting till someone of the kernel maintainers release a patch, or get one of my friends, that is better on programming tasks, to fix that one...
all at all makes for quite a risky day for a shell provider...


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