CVE-2007-5770: Ruby-Lang Ruby

Medium severity, CVSS 5.0. EPSS: 1.9% chance of exploitation in the next 30 days.

The (1) Net::ftptls, (2) Net::telnets, (3) Net::imap, (4) Net::pop, and (5) Net::smtp libraries in Ruby 1.8.5 and 1.8.6 do not verify that the commonName (CN) field in a server certificate matches the domain name in a request sent over SSL, which makes it easier for remote attackers to intercept SSL transmissions via a man-in-the-middle attack or spoofed web site, different components than CVE-2007-5162.

Affected products

• Ruby-Lang Ruby: version 1.8.5 only; version 1.8.6 only

Published 2007-11-14. Last modified 2026-06-16.