CVE-2017-5120: Debian Linux

Medium severity, CVSS 6.5. EPSS: 1.1% chance of exploitation in the next 30 days.

Inappropriate use of www mismatch redirects in browser navigation in Google Chrome prior to 61.0.3163.79 for Mac, Windows, and Linux, and 61.0.3163.81 for Android, allowed a remote attacker to potentially downgrade HTTPS requests to HTTP via a crafted HTML page. In other words, Chrome could transmit cleartext even though the user had entered an https URL, because of a misdesigned workaround for cases where the domain name in a URL almost matches the domain name in an X.509 server certificate (but differs in the initial "www." substring).

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only
• Google Chrome: before 61.0.3163.79 (fixed in 61.0.3163.79); before 61.0.3163.81 (fixed in 61.0.3163.81)
• Red Hat Enterprise Linux Desktop: version 6.0 only
• Red Hat Enterprise Linux Server: version 6.0 only
• Red Hat Enterprise Linux Workstation: version 6.0 only

Published 2017-10-27. Last modified 2026-06-17.