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Message-ID: <CAD_8n+QMfYXNrxzGHhfA35trvjoCsPYNws+Q9xx_UyDzSw2r6w@mail.gmail.com>
Date: Tue, 11 Oct 2011 23:26:55 -0700
From: Reuben Hawkins <reubenhwk@...il.com>
To: Vasiliy Kulikov <segoon@...nwall.com>
Cc: oss-security@...ts.openwall.com
Subject: Re: radvd 1.8.2 released with security fixes
On Sat, Oct 8, 2011 at 9:55 AM, Vasiliy Kulikov <segoon@...nwall.com> wrote:
> On Fri, Oct 07, 2011 at 15:41 +0100, John Haxby wrote:
>> On 07/10/11 14:03, Robert Święcki wrote:
>> > On Fri, Oct 7, 2011 at 12:35 PM, Huzaifa Sidhpurwala
>> > <huzaifas@...hat.com> wrote:
>> >> Shouldnt this be:
>> >>
>> >> /* No path traversal */
>> >> if (strstr(iface, "..") || strchr(iface, '/'))
>> >> return -1;
>> > FWIW, this will reject too much;
>> >
>> > /path/to/sth..jpg
>> >
>>
>> Indeed, since I don't believe that iface can reasonably include a "/"
>> its sufficient to check for that. If not then you need to check for
>> "../" at the beginning of iface and "/.." anywhere else in it. But
>> simply forbidding "/" should be fine.
>
> Crap, thank you for noticing it, guys. The fix should be:
>
> https://github.com/reubenhwk/radvd/commit/7a1471b62da88373e8f4209d503307c5d841b81f
>
> Now, "", "..", "." and filenames with "/" inside are denied.
>
>
> Thanks,
>
> --
> Vasiliy Kulikov
> http://www.openwall.com - bringing security into open computing environments
>
Are y'all waiting on me to release 1.8.3 with the latest fix?
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