CVE-2020-10933

medium

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

Source: MITRE

Published: 2020-05-04

Updated: 2022-05-03

Type: CWE-908

Risk Information

CVSS v2

Base Score: 5

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

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3

Base Score: 5.3

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Impact Score: 1.4

Exploitability Score: 3.9

Severity: MEDIUM