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CVE-2020-10933

Description

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.


Affected Software


CPE Name Name Version
ruby-lang:ruby ruby-lang ruby 2.5.7
ruby-lang:ruby ruby-lang ruby 2.6.5
ruby-lang:ruby ruby-lang ruby 2.7.0
fedoraproject:fedora fedoraproject fedora 31
debian:debian_linux debian debian linux 10.0

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