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Date: Thu, 25 Apr 2019 12:13:37 +0200
From: Peter Korsgaard <peter@...sgaard.com>
To: Michael McNally <mcnally@....org>
Cc: oss-security@...ts.openwall.com
Subject: Re: Multiple BIND vulnerabilities disclosed (CVE-2018-5743, CVE-2019-6467, and CVE-2019-6468)
>>>>> "Michael" == Michael McNally <mcnally@....org> writes:
> Today ISC disclosed two vulnerabilities affecting BIND as well
> as a third vulnerability which affects *only* BIND Supported Preview
> Edition (a special feature-preview version of BIND provided to
> ISC support customers.)
> Information about the vulnerabilities can be found in the ISC Knowledge
> Base:
> CVE-2018-5743: Limiting simultaneous TCP clients is ineffective
> https://kb.isc.org/docs/cve-2018-5743
> CVE-2019-6467: An error in the nxdomain redirect feature can cause
> BIND to exit with an INSIST assertion failure in query.c
> https://kb.isc.org/docs/cve-2019-6467
> CVE-2019-6468: BIND Supported Preview Edition can exit with an
> assertion failure if nxdomain-redirect is used
> https://kb.isc.org/docs/cve-2019-6468
> New releases of BIND have been issued to fix the vulnerabilities above.
> They may be downloaded from the ISC website: https://www.isc.org/downloads
> - 9.11.6-P1
> - 9.12.4-P1
> - 9.14.1
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
:/
--
Bye, Peter Korsgaard
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