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Date: Sat, 27 Apr 2019 19:23:42 +0200
From: Peter Korsgaard <peter@...sgaard.com>
To: andreas@...mhold.de
Cc: oss-security@...ts.openwall.com
Subject: Re: Multiple BIND vulnerabilities disclosed (CVE-2018-5743, CVE-2019-6467, and CVE-2019-6468)
>>>>> "andreas" == andreas <andreas@...mhold.de> writes:
> On 12:13 25.04.19, Peter Korsgaard wrote:
>> It is a bit unfortunate that these security fixes now use
>> isc_atomic_xadd() which are not available on all architectures:
>>
>> .libs/client.o: In function `mark_tcp_active':
>> client.c:(.text+0xc7c): undefined reference to `isc_atomic_xadd'
>> client.c:(.text+0xca0): undefined reference to `isc_atomic_xadd'
>> .libs/client.o: In function `client_accept':
>> client.c:(.text+0x2210): undefined reference to `isc_atomic_xadd'
>> client.c:(.text+0x230c): undefined reference to `isc_atomic_xadd'
>> .libs/client.o: In function `exit_check':
>> client.c:(.text+0x2958): undefined reference to `isc_atomic_xadd'
>> .libs/client.o:client.c:(.text+0x5cb4): more undefined references to `isc_atomic_xadd' follow
>> collect2: error: ld returned 1 exit status
> There is a commit [1] on ISCs GitLab that removes the atomic operations
> in favor of refcounting and thus fixes the aarch64 (and other archs?)
> build error.
> I applied that commit for NixOS. Looks good so far [2].
Yes, that was pointed out to me privatelyl. I am using it as well in
Buildroot:
https://git.buildroot.org/buildroot/commit/?id=fc8ace0938a0bcf2e9fa628a88853252eabc991d
Interesting enough, this fix is on the 9.11 branch:
https://github.com/isc-projects/bind9/commits/v9_11
But not part of the v9_11_6 tag:
https://github.com/isc-projects/bind9/commits/v9_11_6
--
Bye, Peter Korsgaard
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