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AUSCERT External Security Bulletin Redistribution
ESB-2017.2071
c-ares vulnerability
18 August 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: c-ares
Publisher: Ubuntu
Operating System: Ubuntu
Linux variants
Impact/Access: Denial of Service -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2017-1000381
Original Bulletin:
http://www.ubuntu.com/usn/usn-3395-1
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running c-ares check for an updated version of the software for
their operating system.
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Ubuntu Security Notice USN-3395-1
August 17, 2017
c-ares vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 17.04
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS
Summary:
c-ares could be made to crash if it received specially crafted network
traffic.
Software Description:
- - c-ares: library for asynchronous name resolution
Details:
It was discovered that c-ares incorrectly handled certain NAPTR responses.
A remote attacker could possibly use this issue to cause applications using
c-ares to crash, resulting in a denial of service.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 17.04:
libc-ares2 1.12.0-1ubuntu0.1
Ubuntu 16.04 LTS:
libc-ares2 1.10.0-3ubuntu0.2
Ubuntu 14.04 LTS:
libc-ares2 1.10.0-2ubuntu0.2
In general, a standard system update will make all the necessary changes.
References:
https://www.ubuntu.com/usn/usn-3395-1
CVE-2017-1000381
Package Information:
https://launchpad.net/ubuntu/+source/c-ares/1.12.0-1ubuntu0.1
https://launchpad.net/ubuntu/+source/c-ares/1.10.0-3ubuntu0.2
https://launchpad.net/ubuntu/+source/c-ares/1.10.0-2ubuntu0.2
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