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ALPINE-CVE-2021-32066

ALPINE-CVE-2021-32066 PUBLISHED CVSS 7.400000095367432 HIGH

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."

Risk Scores

CVSS v3.1
7.400000095367432
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected Products

VendorProductVersions
Alpine:v3.16ruby2.7.3-r0, 2.7.2-r4, 2.7.2-r3
Alpine:v3.15ruby2.3.1-r0, 2.7.2-r4, 2.7.2-r3
Alpine:v3.23ruby0, 0, 0
Alpine:v3.18ruby*, 1.8.7_p160-r2, 1.8.7_p160-r3
Alpine:v3.19ruby2.3.3-r0, 0, *
Alpine:v3.21ruby0, 0, 0
Alpine:v3.20ruby0, 0, 0
Alpine:v3.14ruby2.5.2-r0, 2.5.1-r2, 2.5.1-r1
Alpine:v3.11ruby2.5.3-r0, 0, 1.8.7_p160-r2
Alpine:v3.12ruby0, 0, 1.8.7_p160-r2
Alpine:v3.17ruby2.7.2-r2, 1.9.3_p286-r1, 1.9.3_p286-r2
Alpine:v3.13ruby1.8.7_p299-r0, 0, 1.8.7_p160-r2
Alpine:v3.22ruby0, 0, 0

Timeline

  • Aug 1, 2021 CVE Published
  • Dec 3, 2025 CVE Updated
  • Apr 30, 2026 Distribution Patch
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