[Pkg-dns-devel] Bug#889285: bind9: CVE-2017-3139 affects debian too: assertion failure in validator.c:1858

[Vladislav Kurz]

Package: bind9
Version: 1:9.8.4.dfsg.P1-6+nmu2+deb7u19
Severity: grave
Tags: security
Justification: renders package unusable

Dear Maintainer,

This is a followup to archived bug #860225.

Although
https://security-tracker.debian.org/tracker/CVE-2017-3139 states that
debian is not affected by CVE-2017-3139, I observed this behavior on
debian wheezy:

Feb  3 08:38:07 server named[16906]: validator.c:1858: INSIST(rdataset->type == ((dns_rdatatype_t)dns_rdatatype_dnskey)) failed, back trace
Feb  3 08:38:07 server named[16906]: #0 0x7f9b66798e19 in ??
Feb  3 08:38:07 server named[16906]: #1 0x7f9b650d5f3a in ??
Feb  3 08:38:07 server named[16906]: #2 0x7f9b66094e57 in ??
Feb  3 08:38:07 server named[16906]: #3 0x7f9b6609b599 in ??
Feb  3 08:38:07 server named[16906]: #4 0x7f9b650f4dfd in ??
Feb  3 08:38:07 server named[16906]: #5 0x7f9b64aa8b50 in ??
Feb  3 08:38:07 server named[16906]: #6 0x7f9b64492fbd in ??
Feb  3 08:38:07 server named[16906]: exiting (due to assertion failure)

Ondrej Zary reported this on Sat, 02 Sep 2017 in bug #860225 but it
was closed and archived without answer. May I ask why?

I had a look in the relevant bug report at redhat, but they do not
provide much details https://bugzilla.redhat.com/show_bug.cgi?id=1447743
So I'm not 100% sure it is the same bug.


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-- System Information:
Debian Release: 7.11
  APT prefers oldoldstable
  APT policy: (500, 'oldoldstable')
Architecture: i386 (i686)

Kernel: Linux 3.2.0-5-686-pae (SMP w/1 CPU core)
Locale: LANG=sk_SK, LC_CTYPE=sk_SK (charmap=ISO-8859-2)
Shell: /bin/sh linked to /bin/bash

Versions of packages bind9 depends on:
ii  adduser                3.113+nmu3
ii  bind9utils             1:9.8.4.dfsg.P1-6+nmu2+deb7u19
ii  debconf [debconf-2.0]  1.5.49
ii  libbind9-80            1:9.8.4.dfsg.P1-6+nmu2+deb7u19
ii  libc6                  2.13-38+deb7u12
ii  libcap2                1:2.22-1.2
ii  libdns88               1:9.8.4.dfsg.P1-6+nmu2+deb7u19
ii  libgssapi-krb5-2       1.10.1+dfsg-5+deb7u9
ii  libisc84               1:9.8.4.dfsg.P1-6+nmu2+deb7u19
ii  libisccc80             1:9.8.4.dfsg.P1-6+nmu2+deb7u19
ii  libisccfg82            1:9.8.4.dfsg.P1-6+nmu2+deb7u19
ii  liblwres80             1:9.8.4.dfsg.P1-6+nmu2+deb7u19
ii  libssl1.0.0            1.0.1t-1+deb7u3
ii  libxml2                2.8.0+dfsg1-7+wheezy12
ii  lsb-base               4.1+Debian8+deb7u1
ii  net-tools              1.60-24.2
ii  netbase                5.0

bind9 recommends no packages.

Versions of packages bind9 suggests:
pn  bind9-doc   <none>
ii  dnsutils    1:9.8.4.dfsg.P1-6+nmu2+deb7u19
pn  resolvconf  <none>
pn  ufw         <none>

-- Configuration Files:
/etc/bind/named.conf.local changed:
//
// Do any local configuration here
//
// Consider adding the 1918 zones here, if they are not used in your
// organization
include "/etc/bind/zones.rfc1918";

/etc/bind/named.conf.options changed:
options {
	directory "/var/cache/bind";
	// If there is a firewall between you and nameservers you want
	// to talk to, you may need to fix the firewall to allow multiple
	// ports to talk.  See http://www.kb.cert.org/vuls/id/800113
	// If your ISP provided one or more IP addresses for stable 
	// nameservers, you probably want to use them as forwarders.  
	// Uncomment the following block, and insert the addresses replacing 
	// the all-0's placeholder.
	// forwarders {
	// 	0.0.0.0;
	// };
	auth-nxdomain no;    # conform to RFC1035
	listen-on-v6 { none; };
	listen-on { 127.0.0.1; };
	dnssec-enable yes;
	dnssec-validation auto;
	dnssec-lookaside auto;
};


-- debconf information:
  bind9/different-configuration-file:
  bind9/run-resolvconf: true
  bind9/start-as-user: bind