Executive Summary

Informations
Name CVE-2021-32066 First vendor Publication 2021-08-01
Vendor Cve Last vendor Modification 2024-01-24

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Overall CVSS Score 7.4
Base Score 7.4 Environmental Score 7.4
impact SubScore 5.2 Temporal Score 7.4
Exploitabality Sub Score 2.2
 
Attack Vector Network Attack Complexity High
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:P/I:P/A:N)
Cvss Base Score 5.8 Attack Range Network
Cvss Impact Score 4.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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."

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32066

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-755 Improper Handling of Exceptional Conditions

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 8
Application 1052

Sources (Detail)

https://security.gentoo.org/glsa/202401-27
Source Url
CONFIRM https://github.com/ruby/ruby/commit/a21a3b7d23704a01d34bd79d09dc37897e00922a
https://security.netapp.com/advisory/ntap-20210902-0004/
https://www.ruby-lang.org/en/news/2021/07/07/starttls-stripping-in-net-imap/
MISC https://hackerone.com/reports/1178562
https://www.oracle.com/security-alerts/cpuapr2022.html
MLIST https://lists.debian.org/debian-lts-announce/2021/10/msg00009.html
https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html

Alert History

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Date Informations
2024-01-24 09:27:47
  • Multiple Updates
2023-08-09 17:28:39
  • Multiple Updates
2023-05-01 05:27:31
  • Multiple Updates
2022-05-11 00:23:07
  • Multiple Updates
2022-04-20 09:23:15
  • Multiple Updates
2021-10-18 17:23:05
  • Multiple Updates
2021-10-13 21:23:25
  • Multiple Updates
2021-09-02 13:23:00
  • Multiple Updates
2021-08-10 17:22:49
  • Multiple Updates
2021-08-02 17:22:50
  • Multiple Updates
2021-08-02 00:22:46
  • First insertion