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ALPINE-CVE-2020-10933

ALPINE-CVE-2020-10933 PUBLISHED CVSS 5.300000190734863 MEDIUM

An issue was discovered in Ruby 2.5.x through 2.5.7, 2.6.x through 2.6.5, and 2.7.0. If a victim calls BasicSocket#read_nonblock(requested_size, buffer, exception: false), the method resizes the buffer to fit the requested size, but no data is copied. Thus, the buffer string provides the previous value of the heap. This may expose possibly sensitive data from the interpreter.

Risk Scores

CVSS v3.1
5.300000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected Products

VendorProductVersions
Alpine:v3.9ruby2.0.0, 2.2.2-r1, 2.2.3-r0
Alpine:v3.21ruby0, 0, 0
Alpine:v3.10ruby2.0.0, 0, 1.8.7_p160-r2
Alpine:v3.18ruby2.0.0, 2.1.5-r1, 2.2.1-r0
Alpine:v3.19ruby2.0.0, 2.1.5-r1, 2.2.1-r0
Alpine:v3.23ruby0, 0, 0
Alpine:v3.14ruby2.4.0-r3, 1.8.7_p160-r2, 1.8.7_p160-r3
Alpine:v3.20ruby0, 0, 0
Alpine:v3.11ruby1.8.7_p358-r1, 1.8.7_p72-r1, 1.8.7_p72-r2
Alpine:v3.13ruby2.6.3-r1, 2.6.5-r2, 2.6.5-r1
Alpine:v3.15ruby2.4.0-r3, 2.4.1-r3, 1.8.7_p174-r0
Alpine:v3.22ruby0, 0, 0
Alpine:v3.16ruby1.8.7_p174-r4, 2.4.0-r3, 2.3.3-r3
Alpine:v3.8ruby2.5.7-r0, 2.4.1-r2, 2.4.1-r1
Alpine:v3.12ruby2.0.0_p481-r0, 2.5.1-r0, 2.5.0-r1
Alpine:v3.17ruby1.8.7_p352-r1, 1.8.7_p358-r1, 1.8.7_p72-r1

Timeline

  • May 4, 2020 CVE Published
  • Dec 3, 2025 CVE Updated
  • Apr 30, 2026 Distribution Patch
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