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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
Description
An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. Net::IMAP does not raise an exception when StartTLS fails with an an unknown response, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a "StartTLS stripping attack."
Metrics
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
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OR
*cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:* versions from (including) 2.6.0 up to (including) 2.6.7
*cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:* versions from (including) 2.7.0 up to (including) 2.7.3
*cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:* versions from (including) 3.0.0 up to (including) 3.0.1
Changed
Reference Type
https://github.com/ruby/ruby/commit/a21a3b7d23704a01d34bd79d09dc37897e00922a No Types Assigned
https://github.com/ruby/ruby/commit/a21a3b7d23704a01d34bd79d09dc37897e00922a Patch, Third Party Advisory
Changed
Reference Type
https://hackerone.com/reports/1178562 No Types Assigned
https://hackerone.com/reports/1178562 Exploit, Patch, Third Party Advisory
Changed
Reference Type
https://www.ruby-lang.org/en/news/2021/07/07/starttls-stripping-in-net-imap/ No Types Assigned