Document ID:57614
Title:Document ID 57614
Synopsis:The in.named(1M) Process May Die Upon Receiving Dynamic Updates
Update Date:2004-09-03
DescriptionTop

Sun(sm) Alert Notification

1. Impact

A remote privileged user may be able to create a denial of the Domain Name System (DNS) service by killing the in.named(1M) daemon. As a result, applications, systems and devices relying on DNS may fail.

2. Contributing Factors

This issue can occur in the following releases:

SPARC Platform

x86 Platform

Note: Solaris 7 and Solaris 9 are not affected by this issue.

The described issue only occurs on systems configured as an Internet DNS server. A system is configured to be a DNS server if the configuration file "/etc/named.conf" (named.conf(4)) exists.

3. Symptoms

If the described issue occurs, the in.named(1M) process is no longer running. To determine if the in.named(1M) process is running, use the pgrep(1) command as shown: 

    $ pgrep in.named || echo "in.named process NOT found!"
Messages may be logged to syslog(3c) with a severity of "LOG_NOTICE" whose content starts with the following: 

    "unapproved update from"
Solution SummaryTop

4. Relief/Workaround

To work around the described issue, restart in.named(1M) using the following command as root user: 

    # pgrep in.named || /usr/sbin/in.named
The following simple Bourne shell script will check and restart in.named(1M) as necessary: 

    # while pgrep in.named || /usr/sbin/in.named; do sleep 10; done

5. Resolution

This issue is addressed in the following releases:

SPARC Platform

x86 Platform

This Sun Alert notification is being provided to you on an "AS IS" basis. This Sun Alert notification may contain information provided by third parties. The issues described in this Sun Alert notification may or may not impact your system(s). Sun makes no representations, warranties, or guarantees as to the information contained herein. ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN. This Sun Alert notification contains Sun proprietary and confidential information. It is being provided to you pursuant to the provisions of your agreement to purchase services from Sun, or, if you do not have such an agreement, the Sun.com Terms of Use. This Sun Alert notification may only be used for the purposes contemplated by these agreements.

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