CVE-2016-6173
First published: Thu Feb 09 2017(Updated: )
NSD before 4.1.11 allows remote DNS master servers to cause a denial of service (/tmp disk consumption and slave server crash) via a zone transfer with unlimited data.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| NLnet Labs Name Server Daemon | <=4.1.10 |
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Reference Links
- http://www.nlnetlabs.nl/svn/nsd/tags/NSD_4_1_11_REL/doc/RELNOTES
- http://www.openwall.com/lists/oss-security/2016/07/06/3
- http://www.openwall.com/lists/oss-security/2016/07/06/4
- http://www.securityfocus.com/bid/91678
- https://github.com/sischkg/xfer-limit/blob/master/README.md
- https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.html
- https://open.nlnetlabs.nl/pipermail/nsd-users/2016-August/002342.html
- https://www.nlnetlabs.nl/bugs-script/show_bug.cgi?id=790
Frequently Asked Questions
What is the severity of CVE-2016-6173?
CVE-2016-6173 is classified as a denial of service vulnerability that can lead to service disruption.
How do I fix CVE-2016-6173?
To fix CVE-2016-6173, upgrade to NSD version 4.1.11 or later.
What types of systems are affected by CVE-2016-6173?
CVE-2016-6173 affects NSD versions prior to 4.1.11, particularly on slave DNS servers.
What is the cause of the vulnerability in CVE-2016-6173?
CVE-2016-6173 is caused by the ability of remote DNS master servers to send a zone transfer with unlimited data.
Can CVE-2016-6173 be exploited remotely?
Yes, CVE-2016-6173 can be exploited remotely, leading to disk consumption and potentially crashing the DNS slave server.
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