Input validation error in dnsdist - CVE-2016-7069

Vulnerability identifier: #VU77910

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2016-7069

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists in the way EDNS0 OPT records are handled when parsing responses from a backend. When dnsdist is configured to add EDNS Client Subnet to a query, the response may contain an EDNS0 OPT record that has to be removed before forwarding the response to the initial client.

dnsdist
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro
Fedora
SUSE Linux Enterprise Server 15 SP1 LTSS
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP3 LTSS
SUSE Package Hub 15
Basesystem Module
openSUSE Leap
dnsdist
dnsdist-debuginfo
dnsdist-debugsource
libluajit-5_1-2
luajit-debuginfo
libluajit-5_1-2-debuginfo
luajit-debugsource
libluajit-5_1-2-32bit-debuginfo
libluajit-5_1-2-32bit
luajit-devel
luajit

Install updates from vendor's website.

dnsdist - update to 1.2.0
dnsdist - addressed in versions 1.2.0-1.el7, 1.2.0-1.fc25, 1.2.0-1.fc26
dnsdist-debuginfo - addressed in versions 1.8.0-150100.3.5.1, 1.8.0-150400.9.3.1
dnsdist - addressed in versions 1.8.0-150100.3.5.1, 1.8.0-150400.9.3.1
dnsdist-debugsource - addressed in versions 1.8.0-150100.3.5.1, 1.8.0-150400.9.3.1
libluajit-5_1-2 - update to 2.1.0~beta3+git.1624618403.e9577376-150400.4.2.1
luajit-debuginfo - update to 2.1.0~beta3+git.1624618403.e9577376-150400.4.2.1
libluajit-5_1-2-debuginfo - update to 2.1.0~beta3+git.1624618403.e9577376-150400.4.2.1
luajit-debugsource - update to 2.1.0~beta3+git.1624618403.e9577376-150400.4.2.1
libluajit-5_1-2-32bit-debuginfo - update to 2.1.0~beta3+git.1624618403.e9577376-150400.4.2.1
libluajit-5_1-2-32bit - update to 2.1.0~beta3+git.1624618403.e9577376-150400.4.2.1
luajit-devel - update to 2.1.0~beta3+git.1624618403.e9577376-150400.4.2.1
luajit - update to 2.1.0~beta3+git.1624618403.e9577376-150400.4.2.1

• http://www.securityfocus.com/bid/100509
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069
• https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.html

• Denial of service in dnsdist
• SUSE update for dnsdist
• SUSE update for dnsdist
• SUSE update for dnsdist
• Fedora EPEL 7 update for dnsdist
• Fedora 25 update for dnsdist
• Fedora 26 update for dnsdist