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computer vulnerability bulletin CVE-2016-6167 CVE-2017-6542

PuTTY: two vulnerabilities

Synthesis of the vulnerability

An attacker can use several vulnerabilities of PuTTY.
Impacted software: Fedora, openSUSE Leap, PuTTY, WinSCP, X2GoClient.
Severity of this computer vulnerability: 2/4.
Consequences of a hack: user access/rights.
Attacker's origin: intranet client.
Number of vulnerabilities in this bulletin: 2.
Creation date: 24/02/2017.
Revision date: 22/03/2017.
Références of this announce: CVE-2016-6167, CVE-2017-6542, FEDORA-2017-efdd962fee, openSUSE-SU-2017:0741-1, VIGILANCE-VUL-21958.

Description of the vulnerability

Several vulnerabilities were announced in PuTTY.

An attacker can generate an integer overflow via ssh_agent_channel_data(), in order to trigger a denial of service, and possibly to run code. [severity:2/4; CVE-2017-6542]

An attacker can create a malicious DLL, and then put it in the current directory, in order to execute code. [severity:2/4; CVE-2016-6167]
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