An issue exists in Ruby 2.5.x up to and including 2.5.7, 2.6.x up to and including 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.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
ruby-lang ruby |
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ruby-lang ruby 2.7.0 |
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fedoraproject fedora 31 |
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debian debian linux 10.0 |
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