CVE-2021-32066

 

Published at: - 01-08-2021 09:15

Last modified: - 10-05-2022 08:03

Total changes: - 10

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."

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

 

Verification logic

 

Reference

• https://github.com/ruby/ruby/commit/a21a3b7d23704a01d34bd79d09dc37897e00922a
• https://www.ruby-lang.org/en/news/2021/07/07/starttls-stripping-in-net-imap/
• https://hackerone.com/reports/1178562
• https://security.netapp.com/advisory/ntap-20210902-0004/
• [debian-lts-announce] 20211013 [SECURITY] [DLA 2780-1] ruby2.3 security update-Third Party Advisory
• https://www.oracle.com/security-alerts/cpuapr2022.html

 

Keywords

NVD

 

CVE-2021-32066

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures