USN-3491-1: ldns vulnerabilities
Ubuntu Security Notice USN-3491-1
22nd November, 2017
ldns vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 17.10
- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary
Several security issues were fixed in ldns.
Software description
- ldns
– ldns library for DNS programming
Details
Leon Weber discovered that the ldns-keygen tool incorrectly set permissions
on private keys. A local attacker could possibly use this issue to obtain
generated private keys. This issue only applied to Ubuntu 14.04 LTS.
(CVE-2014-3209)
Stephan Zeisberg discovered that ldns incorrectly handled memory when
processing data. A remote attacker could use this issue to cause ldns to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2017-1000231, CVE-2017-1000232)
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 17.10:
-
libldns2
1.7.0-1ubuntu1.17.10.1
- Ubuntu 17.04:
-
libldns2
1.7.0-1ubuntu1.17.04.1
- Ubuntu 16.04 LTS:
-
libldns1
1.6.17-8ubuntu0.1
- Ubuntu 14.04 LTS:
-
libldns1
1.6.17-1ubuntu0.1
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
References
Source: USN-3491-1: ldns vulnerabilities
