==========================================================================
Ubuntu Security Notice USN-2519-1
February 26, 2015
eglibc, glibc vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 14.10
– Ubuntu 14.04 LTS
– Ubuntu 12.04 LTS
– Ubuntu 10.04 LTS
Summary:
Several security issues were fixed in the GNU C Library.
Software Description:
– glibc: GNU C Library
– eglibc: GNU C Library
Details:
Arnaud Le Blanc discovered that the GNU C Library incorrectly handled file
descriptors when resolving DNS queries under high load. This may cause a
denial of service in other applications, or an information leak. This issue
only affected Ubuntu 10.04 LTS, Ubuntu 12.04 LTS and Ubuntu 14.04 LTS.
(CVE-2013-7423)
It was discovered that the GNU C Library incorrectly handled receiving a
positive answer while processing the network name when performing DNS
resolution. A remote attacker could use this issue to cause the GNU C
Library to hang, resulting in a denial of service. (CVE-2014-9402)
Joseph Myers discovered that the GNU C Library wscanf function incorrectly
handled memory. A remote attacker could possibly use this issue to cause
the GNU C Library to crash, resulting in a denial of service, or possibly
execute arbitrary code. This issue only affected Ubuntu 12.04 LTS, Ubuntu
14.04 LTS and Ubuntu 14.10. (CVE-2015-1472, CVE-2015-1473)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 14.10:
libc6 2.19-10ubuntu2.3
Ubuntu 14.04 LTS:
libc6 2.19-0ubuntu6.6
Ubuntu 12.04 LTS:
libc6 2.15-0ubuntu10.11
Ubuntu 10.04 LTS:
libc6 2.11.1-0ubuntu7.21
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-2519-1
CVE-2013-7423, CVE-2014-9402, CVE-2015-1472, CVE-2015-1473
Package Information:
https://launchpad.net/ubuntu/+source/glibc/2.19-10ubuntu2.3
https://launchpad.net/ubuntu/+source/eglibc/2.19-0ubuntu6.6
https://launchpad.net/ubuntu/+source/eglibc/2.15-0ubuntu10.11
https://launchpad.net/ubuntu/+source/eglibc/2.11.1-0ubuntu7.21
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