Vulnerability Monitor

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CVE-2020-10933

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.

Published

2020-05-04T15:15:13.963

Last Modified

2024-11-21T04:56:23.987

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.3 (MEDIUM)

CVSSv2 Vector

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

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: NONE
  • Availability Impact: NONE
Exploitability Score

10.0

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-908
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application ruby-lang ruby ≤ 2.5.7 Yes
Application ruby-lang ruby ≤ 2.6.5 Yes
Application ruby-lang ruby 2.7.0 Yes
Operating System linux linux_kernel - No
Operating System fedoraproject fedora 31 Yes
Operating System debian debian_linux 10.0 Yes
References