ALPINE-CVE-2021-32066

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2021-32066
Published: 01 Aug 2021, 19:15
Last modified:03 Dec 2025, 22:48

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.4 HIGH
3.1 (osv_alpine)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

01 Aug 2021, 19:15
Published
Vulnerability first disclosed
03 Dec 2025, 22:48
Last Modified
Vulnerability information updated

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."

CVSS Metrics

  • v3.1•HIGH•Score: 7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected Systems

  • alpine•ruby

    < 2.6.8-r0 | < 2.7.4-r0 | < 2.7.4-r0 | < 2.7.4-r0 | < 2.7.4-r0 | < 2.7.4-r0 | < 2.7.4-r0 | < 2.7.4-r0 | < 2.7.4-r0 | < 2.7.4-r0 | < 2.7.4-r0 | < 2.7.4-r0 | < 2.7.4-r0

References (1)