#VU12161 Man-in-the-middle attack in Go programming language - CVE-2017-15042

Vulnerability identifier: #VU12161

Vulnerability risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-15042

CWE-ID: CWE-300

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Go programming language
Universal components / Libraries / Scripting languages

Vendor: Google

Description
The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.

The weakness exists in the smtp.PlainAuth implementation due to an unintended cleartext issue. A remote attacker can conduct man-in-the-middle attack and gain the username and password.

Mitigation
Update to versions 1.8.4 or 1.9.1.

Vulnerable software versions

Go programming language: 1.8 - 1.8.3, 1.9

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External links
https://github.com/golang/go/issues/22134

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.