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Vulnerability of Microsoft Lync: multiple vulnerabilities

Synthesis of the vulnerability 

An attacker can use several vulnerabilities of Microsoft Lync.
Vulnerable systems: Lync.
Severity of this threat: 3/4.
Number of vulnerabilities in this bulletin: 3.
Creation date: 09/09/2014.
Références of this weakness: 2990928, CERTFR-2014-AVI-378, CVE-2014-4068, CVE-2014-4070, CVE-2014-4071, MS14-055, VIGILANCE-VUL-15314.

Description of the vulnerability 

Several vulnerabilities were announced in Microsoft Lync.

An attacker can generate an exception, in order to trigger a denial of service. [severity:3/4; CVE-2014-4068]

An attacker can trigger a Cross Site Scripting, in order to execute JavaScript code in the context of the web site. [severity:2/4; CVE-2014-4070]

An attacker can force a NULL pointer to be dereferenced, in order to trigger a denial of service. [severity:3/4; CVE-2014-4071]
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This computer weakness bulletin impacts software or systems such as Lync.

Our Vigil@nce team determined that the severity of this computer threat announce is important.

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

This bulletin is about 3 vulnerabilities.

An attacker with a expert ability can exploit this threat announce.

Solutions for this threat 

Microsoft Lync: patch.
A patch is available in information sources.
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