CVEvulnerability

CVE-2021-32066

7.4 HIGH Published 2021-08-01 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-08-01
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.4 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 2.0 ([email protected])
5.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:N
Weaknesses
CWE-755

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."

Affected configurations

• ruby-lang ruby (>= 2.6.0 <= 2.6.7) • ruby-lang ruby (>= 2.7.0 <= 2.7.3) • ruby-lang ruby (>= 3.0.0 <= 3.0.1) • oracle jd edwards enterpriseone tools (< 9.2.6.1)

Related

Weakness · CWE (1)

  • CWE-755 Improper Handling of Exceptional Conditions weakness

References