ROS-2-1172

2.1172 Vulnerability in BIND DNS server

1. Vulnerability description:

Security issue is related to inefficiency of protection against “DNS rebinding” attacks when operating in the DNS server redirecting requests mode (block “forwarders” in the settings).Identifier of the Information Security Threats Data Bank of the FSTEC of Russia: BDU:2020-02062

2. Possible measures to eliminate the vulnerability

Disable BIND DNS server or - install security updates for package: bind-9.11.4-6Installing updates is possible by the following methods:**a) if the computer with the installed OS version has access to the vendor’s official repository, run the update as administrator with the command:# yum updateAfter the list of updated packages is displayed, agree to apply the updates by pressingY**on the keyboard. Wait until the updates installation is complete and make sure that there are no errors during their installation.b)If the computer with the installed OS version does not have access to the vendor’s official repository, you should perform the following actions: - download the updated package (and dependencies if necessary): http://repo.red-soft.ru/redos/7.2c/x86_64/updates/bind-9.11.4-6.P2.el7.x86_64.rpm Check the integrity and authenticity of the package according to instructionsInstall the downloaded package with the command:# yum localinstall bind-9.11.4-6.P2.el7.x86_64.rpmWhen the list of updated packages is displayed, agree to apply the updates by pressingY on the keyboard. Wait for the updates to finish installing and make sure there are no errors during installation.

Date of last modification: 08.09.2021