Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 51.8%
CVSS Severity
CVSS v3 Score 5.3
CVSS v2 Score 5.0
References
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F4TNVTT66VPRMX5UZYSDGSVRXKKDDDU5/
- https://security.netapp.com/advisory/ntap-20200625-0001/
- https://www.debian.org/security/2020/dsa-4721
- https://www.ruby-lang.org/en/news/2020/03/31/heap-exposure-in-socket-cve-2020-10933/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F4TNVTT66VPRMX5UZYSDGSVRXKKDDDU5/
- https://security.netapp.com/advisory/ntap-20200625-0001/
- https://www.debian.org/security/2020/dsa-4721
- https://www.ruby-lang.org/en/news/2020/03/31/heap-exposure-in-socket-cve-2020-10933/
Products affected by CVE-2020-10933
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cpe:2.3:a:ruby-lang:ruby:2.5.0
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cpe:2.3:a:ruby-lang:ruby:2.5.1
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cpe:2.3:a:ruby-lang:ruby:2.5.2
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cpe:2.3:a:ruby-lang:ruby:2.5.3
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cpe:2.3:a:ruby-lang:ruby:2.5.4
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cpe:2.3:a:ruby-lang:ruby:2.5.5
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cpe:2.3:a:ruby-lang:ruby:2.5.6
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cpe:2.3:a:ruby-lang:ruby:2.5.7
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cpe:2.3:a:ruby-lang:ruby:2.6.0
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cpe:2.3:a:ruby-lang:ruby:2.6.1
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cpe:2.3:a:ruby-lang:ruby:2.6.2
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cpe:2.3:a:ruby-lang:ruby:2.6.3
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cpe:2.3:a:ruby-lang:ruby:2.6.4
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cpe:2.3:a:ruby-lang:ruby:2.6.5
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cpe:2.3:a:ruby-lang:ruby:2.7.0
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cpe:2.3:o:debian:debian_linux:10.0
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cpe:2.3:o:fedoraproject:fedora:31
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cpe:2.3:o:linux:linux_kernel:-