Arch Linux ASA-201704-11 High Severity: Bind DoS Threat

Arch Linux Security Advisory ASA-201704-11
=========================================
Severity: High
Date    : 2017-04-29
CVE-ID  : CVE-2017-3136 CVE-2017-3137 CVE-2017-3138
Package : bind
Type    : denial of service
Remote  : Yes
Link    : https://security.archlinux.org/AVG-239

Summary
======
The package bind before version 9.11.1-1 is vulnerable to denial of
service.

Resolution
=========
Upgrade to 9.11.1-1.

# pacman -Syu "bind>=9.11.1-1"

The problems have been fixed upstream in version 9.11.1.

Workaround
=========
None.

Description
==========
- CVE-2017-3136 (denial of service)

A security issue has been found in bind, where an error handling
synthesized records could cause an assertion failure when using DNS64
with "break-dnssec yes;".

- CVE-2017-3137 (denial of service)

A security issue has been found in bind, where a server which is
performing recursion can be forced to exit with an assertion failure if
it can be caused to receive a response containing CNAME or DNAME
resource records with certain ordering.

- CVE-2017-3138 (denial of service)

A security issue has been found in the bind named daemon, that will
exit with a "require" assertion failure if it receives a null command
string on its control channel. The control channel is not enabled by
default and is usually restricted to a few remote hosts via an ACL
and/or a transaction key.

Impact
=====
A remote attacker can crash the application, leading to denial of
service.

References
=========
https://security.archlinux.org/CVE-2017-3136
https://security.archlinux.org/CVE-2017-3137
https://security.archlinux.org/CVE-2017-3138