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Ubuntu Security Notice USN-1589-2

Ubuntu Security Notice USN-1589-2
Posted Dec 18, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1589-2 - USN-1589-1 fixed vulnerabilities in the GNU C Library. One of the updates exposed a regression in the floating point parser. This update fixes the problem. 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. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, vulnerability
systems | linux, ubuntu
advisories | CVE-2012-3480, CVE-2012-3480
SHA-256 | 5ede9c10aca0d60fd34b94b3e266cb77e4930fe9a283734c9b84820f56b74a90

Ubuntu Security Notice USN-1589-2

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-1589-2
December 17, 2012

glibc regression
============================================================================

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

- Ubuntu 8.04 LTS

Summary:

USN-1589-1 exposed a regression in the GNU C Library floating point parser.

Software Description:
- glibc: GNU C Library

Details:

USN-1589-1 fixed vulnerabilities in the GNU C Library. One of the updates
exposed a regression in the floating point parser. This update fixes the
problem.

We apologize for the inconvenience.

Original advisory 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 8.04 LTS:
libc6 2.7-10ubuntu8.3

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

References:
http://www.ubuntu.com/usn/usn-1589-2
http://www.ubuntu.com/usn/usn-1589-1
CVE-2012-3480

Package Information:
https://launchpad.net/ubuntu/+source/glibc/2.7-10ubuntu8.3
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