Ubuntu Security Notice 3068-1 - Thijs Alkemade, Gustavo Grieco, Daniel Stenberg, and Nikos Mavrogiannopoulos discovered that Libidn incorrectly handled invalid UTF-8 characters. A remote attacker could use this issue to cause Libidn to crash, resulting in a denial of service, or possibly disclose sensitive memory. This issue only applied to Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. Hanno Boeck discovered that Libidn incorrectly handled certain input. A remote attacker could possibly use this issue to cause Libidn to crash, resulting in a denial of service. Various other issues were also addressed.
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Ubuntu Security Notice USN-3068-1
August 24, 2016
libidn vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
Summary:
Several security issues were fixed in Libidn.
Software Description:
- libidn: implementation of IETF IDN specifications
Details:
Thijs Alkemade, Gustavo Grieco, Daniel Stenberg, and Nikos
Mavrogiannopoulos discovered that Libidn incorrectly handled invalid UTF-8
characters. A remote attacker could use this issue to cause Libidn to
crash, resulting in a denial of service, or possibly disclose sensitive
memory. This issue only applied to Ubuntu 12.04 LTS and Ubuntu 14.04 LTS.
(CVE-2015-2059)
Hanno B=C3=B6ck discovered that Libidn incorrectly handled certain input. A
remote attacker could possibly use this issue to cause Libidn to crash,
resulting in a denial of service. (CVE-2015-8948, CVE-2016-6262,
CVE-2016-6261, CVE-2016-6263)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.04 LTS:
libidn11 1.32-3ubuntu1.1
Ubuntu 14.04 LTS:
libidn11 1.28-1ubuntu2.1
Ubuntu 12.04 LTS:
libidn11 1.23-2ubuntu0.1
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-3068-1
CVE-2015-2059, CVE-2015-8948, CVE-2016-6261, CVE-2016-6262,
CVE-2016-6263
Package Information:
https://launchpad.net/ubuntu/+source/libidn/1.32-3ubuntu1.1
https://launchpad.net/ubuntu/+source/libidn/1.28-1ubuntu2.1
https://launchpad.net/ubuntu/+source/libidn/1.23-2ubuntu0.1