Vulnerability identifier: #VU33826

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-4620

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ISC BIND
Server applications / DNS servers

Vendor: ISC

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

name.c in named in ISC BIND 9.7.x through 9.9.x before 9.9.7-P1 and 9.10.x before 9.10.2-P2, when configured as a recursive resolver with DNSSEC validation, allows remote attackers to cause a denial of service (REQUIRE assertion failure and daemon exit) by constructing crafted zone data and then making a query for a name in that zone.

Mitigation
Install update from vendor's website.

Vulnerable software versions

ISC BIND: 9.7.0 - 9.7.7b1

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External links
http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162040.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162286.html
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00013.html
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00050.html
http://lists.opensuse.org/opensuse-updates/2015-07/msg00038.html
http://marc.info/?l=bugtraq&m=143740940810833&w=2
http://rhn.redhat.com/errata/RHSA-2015-1443.html
http://rhn.redhat.com/errata/RHSA-2015-1471.html
http://www.debian.org/security/2015/dsa-3304
http://www.securityfocus.com/bid/75588
http://www.securitytracker.com/id/1032799
http://www.ubuntu.com/usn/USN-2669-1
http://kb.isc.org/article/AA-01267
http://kb.isc.org/article/AA-01305
http://kb.isc.org/article/AA-01306
http://kb.isc.org/article/AA-01307
http://kb.isc.org/article/AA-01438
http://kb.juniper.net/JSA10783
http://kc.mcafee.com/corporate/index?page=content&id=SB10124
http://security.gentoo.org/glsa/201510-01
http://security.netapp.com/advisory/ntap-20190903-0003/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.