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Vulnerability of glibc: buffer overflow of scanf

Synthesis of the vulnerability 

An attacker can generate a buffer overflow in scanf() functions of the glibc, in order to trigger a denial of service, and possibly to execute code.
Impacted systems: Arkoon FAST360, Unix (platform) ~ not comprehensive.
Severity of this alert: 2/4.
Creation date: 26/02/2015.
Références of this alert: 13138, CVE-2011-5320, STORM-2015-09-EN, STORM-2015-10-EN, STORM-2015-11-EN.2, STORM-2015-12-EN, VIGILANCE-VUL-16271.

Description of the vulnerability 

Functions in the scanf() family analyze a string to store it in variables. For example, to decode an integer:
  scanf("%i", &integer);

However, if the size of data is greater than the size of the storage array, an overflow occurs in the _IO_vfscanf_internal() function.

An attacker can therefore generate a buffer overflow in scanf() functions of the glibc, in order to trigger a denial of service, and possibly to execute code.
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This computer vulnerability alert impacts software or systems such as Arkoon FAST360, Unix (platform) ~ not comprehensive.

Our Vigil@nce team determined that the severity of this computer threat alert is medium.

The trust level is of type confirmed by the editor, with an origin of document.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a technician ability can exploit this security vulnerability.

Solutions for this threat 

glibc: version 2.15.
The version 2.15 is fixed:
  http://www.gnu.org/software/libc/

glibc: patch for scanf.
A patch is available in information sources.

Arkoon Fast360: version 5.0/35.
The version 5.0/35 is fixed.

Arkoon Fast360: version 6.0/9.
The version 6.0/9 is fixed.
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