CVE-2020-10933 Information

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 BasicSocketread_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.

CVSS Vector

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

Reference

https://lists.fedoraproject.org/archives/list/package-announce@lists.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/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

5.3