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.

References

https://www.ruby-lang.org/en/news/2020/03/31/heap-exposure-in-socket-cve-2020-10933/

https://lists.fedoraproject.org/archives/list/[email protected]/message/F4TNVTT66VPRMX5UZYSDGSVRXKKDDDU5/

https://security.netapp.com/advisory/ntap-20200625-0001/

https://www.debian.org/security/2020/dsa-4721

Details

Risk Information

CVSS v2

CVSS v3