Ruby up to 2.6.7/2.7.3/3.0.1 StartTLS Net::IMAP certificate validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Ruby up to 2.6.7/2.7.3/3.0.1. This vulnerability affects the function Net::IMAP of the component StartTLS Handler. Executing a manipulation can lead to certificate validation. This vulnerability is tracked as CVE-2021-32066. The attack can be launched remotely. No exploit exists. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability has been found in Ruby up to 2.6.7/2.7.3/3.0.1 (Programming Language Software) and classified as critical. This vulnerability affects the function Net::IMAP of the component StartTLS Handler. The manipulation with an unknown input leads to a certificate validation vulnerability. The CWE definition for the vulnerability is CWE-295. The product does not validate, or incorrectly validates, a certificate. As an impact it is known to affect confidentiality.

The weakness was disclosed 08/02/2021. The advisory is available at ruby-lang.org. This vulnerability was named CVE-2021-32066. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1587.003 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 234723 (Oracle Linux 8 : ruby:3.1 (ELSA-2025-4063)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the databases at Tenable (234723) and CERT Bund (WID-SEC-2022-1305). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • Gentoo Linux
  • Open Source Arch Linux
  • Open Source Ruby
  • SUSE openSUSE

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 234723
Nessus Name: Oracle Linux 8 : ruby:3.1 (ELSA-2025-4063)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

05/06/2021 🔍
08/02/2021 +88 days 🔍
08/02/2021 +0 days 🔍
05/09/2026 +1741 days 🔍

Sourcesinfo

Product: github.com

Advisory: ruby-lang.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-32066 (🔍)
GCVE (CVE): GCVE-0-2021-32066
GCVE (VulDB): GCVE-100-179842
CERT Bund: WID-SEC-2022-1305 - Ruby: Mehrere Schwachstellen

Entryinfo

Created: 08/02/2021 08:01
Updated: 05/09/2026 18:30
Changes: 08/02/2021 08:01 (39), 08/06/2021 10:04 (3), 04/23/2025 08:58 (16), 05/09/2026 18:30 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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