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Ubuntu: Security update for GNU C Library

It was discovered that positional arguments to the printf() family of functions were not handled properly in the GNU C Library. An attacker could possibly use this to cause a stack-based buffer overflow, creating a denial of service or possibly execute arbitrary code. It was discovered that multiple integer overflows existed in the strtod(), strtof() and strtold() functions in the GNU C Library. An attacker could possibly use this to trigger a stack-based buffer overflow, creating a denial of service or possibly execute arbitrary code.

Updated packages are available from security.ubuntu.com.

==========================================================================
Ubuntu Security Notice USN-1589-1
October 02, 2012

eglibc, glibc vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS

Summary:

Multiple security issues were fixed in the GNU C Library.

Software Description:
- eglibc: GNU C Library
- glibc: GNU C Library

Details:

It was discovered that positional arguments to the printf() family
of functions were not handled properly in the GNU C Library. An
attacker could possibly use this to cause a stack-based buffer
overflow, creating a denial of service or possibly execute arbitrary
code. (CVE-2012-3404, CVE-2012-3405, CVE-2012-3406)

It was discovered that multiple integer overflows existed in the
strtod(), strtof() and strtold() functions in the GNU C Library. An
attacker could possibly use this to trigger a stack-based buffer
overflow, creating a denial of service or possibly execute arbitrary
code. (CVE-2012-3480)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 LTS:
 libc6                           2.15-0ubuntu10.2

Ubuntu 11.10:
 libc6                           2.13-20ubuntu5.2

Ubuntu 11.04:
 libc6                           2.13-0ubuntu13.2

Ubuntu 10.04 LTS:
 libc6                           2.11.1-0ubuntu7.11

Ubuntu 8.04 LTS:
 libc6                           2.7-10ubuntu8.2

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
 http://www.ubuntu.com/usn/usn-1589-1
 CVE-2012-3404, CVE-2012-3405, CVE-2012-3406, CVE-2012-3480

Package Information:
 https://launchpad.net/ubuntu/+source/eglibc/2.15-0ubuntu10.2
 https://launchpad.net/ubuntu/+source/eglibc/2.13-20ubuntu5.2
 https://launchpad.net/ubuntu/+source/eglibc/2.13-0ubuntu13.2
 https://launchpad.net/ubuntu/+source/eglibc/2.11.1-0ubuntu7.11
 https://launchpad.net/ubuntu/+source/glibc/2.7-10ubuntu8.2
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