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CVE-2017-15042

5.9 · MEDIUM

An unintended cleartext issue exists in Go before 1.8.4 and 1.9.x before 1.9.1.

Published Oct 5, 2017CWE-319EPSS 1.28%

Overview

CVE-2017-15042 is a medium-severity vulnerability. It was published on October 5, 2017 and has a CVSS 3.0 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

An unintended cleartext issue exists in Go before 1.8.4 and 1.9.x before 1.9.1. RFC 4954 requires that, during SMTP, the PLAIN auth scheme must only be used on network connections secured with TLS. The original implementation of smtp.PlainAuth in Go 1.0 enforced this requirement, and it was documented to do so. In 2013, upstream issue #5184, this was changed so that the server may decide whether PLAIN is acceptable. The result is that if you set up a man-in-the-middle SMTP server that doesn't advertise STARTTLS and does advertise that PLAIN auth is OK, the smtp.PlainAuth implementation sends the username and password.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.securityfocus.com/bid/101197Refaccess.redhat.com/errata/RHSA-2017:3463Refaccess.redhat.com/errata/RHSA-2018:0878GitHubgithub.com/golang/go/issues/22134Refgolang.org/cl/68023Refgolang.org/cl/68210Refgroups.google.com/d/msg/golang-dev/RinSE3EiJBI/kYL7zb07AgAJRefsecurity.gentoo.org/glsa/201710-23Refwww.securityfocus.com/bid/101197Refaccess.redhat.com/errata/RHSA-2017:3463

How CyberStrike helps

Frequently asked questions

What is CVE-2017-15042?

CVE-2017-15042 is a medium-severity vulnerability. It was published on October 5, 2017 and has a CVSS 3.0 base score of 5.9 (MEDIUM).

How severe is CVE-2017-15042?

This vulnerability has a CVSS 3.0 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-15042?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-15042?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-15042 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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