Vulnerability in Golang Go
CVE-2017-15042
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.
EPSS: 0.011 (62.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Golang Go — versions 1.9
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (x_refsource_REDHAT, vendor-advisory)
- cve@mitre.org (x_refsource_REDHAT, vendor-advisory)
- cve@mitre.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Patch, Issue Tracking, Vendor Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Patch, Issue Tracking, Vendor Advisory)
- cve@mitre.org (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
- cve@mitre.org (x_refsource_CONFIRM, Mailing List, Vendor Advisory)
Frequently asked questions
- What is CVE-2017-15042?
- CVE-2017-15042 is a medium-severity vulnerability in Golang Go, classified under Cleartext Transmission of Sensitive Information. CVSS score: 5.9/10. Published 2017-10-05.
- How severe is CVE-2017-15042?
- Medium severity. CVSS v3 base score is 5.9 out of 10.