CVE-2021-32066

2021-07-1500:00:00

ubuntu.com

7.4 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

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

5.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

0.002 Low

EPSS

Percentile

63.8%

JSON

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.”

OSVersionArchitecturePackageVersionFilename
ubuntu16.04noarchruby2.3< 2.3.1-2~ubuntu16.04.16+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchruby2.5< 2.5.1-1ubuntu1.10UNKNOWN
ubuntu20.04noarchruby2.7< 2.7.0-5ubuntu1.5UNKNOWN
ubuntu20.10noarchruby2.7< 2.7.1-3ubuntu1.4UNKNOWN
ubuntu21.04noarchruby2.7< 2.7.2-4ubuntu1.2UNKNOWN
ubuntu21.10noarchruby2.7< 2.7.4-1ubuntu1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	16.04	noarch	ruby2.3	< 2.3.1-2~ubuntu16.04.16+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	18.04	noarch	ruby2.5	< 2.5.1-1ubuntu1.10	UNKNOWN
ubuntu	20.04	noarch	ruby2.7	< 2.7.0-5ubuntu1.5	UNKNOWN
ubuntu	20.10	noarch	ruby2.7	< 2.7.1-3ubuntu1.4	UNKNOWN
ubuntu	21.04	noarch	ruby2.7	< 2.7.2-4ubuntu1.2	UNKNOWN
ubuntu	21.10	noarch	ruby2.7	< 2.7.4-1ubuntu1	UNKNOWN