CVE-2020-10933

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 04-05-2020 05:15

Last modified: - 03-05-2022 04:21

Total changes: - 3

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.

Common Vulnerability Scoring System (CVSS)

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

Low

Attack complexity

Network

Attack vector

None

Availability

Low

Confidentiality

None

Integrity

None

Privileges required

Unchanged

Scope

None

User interaction

5.3

Base score

3.9

1.4

Exploitability score

Impact score

Verification logic

AND

vendor=ruby-lang AND product=ruby AND versionEndIncluding=2.5.7 AND versionStartIncluding=2.5.0

vendor=ruby-lang AND product=ruby AND versionEndIncluding=2.6.5 AND versionStartIncluding=2.6.0

vendor=ruby-lang AND product=ruby AND version=2.7.0

vendor=linux AND product=linux_kernel AND version=-

vendor=fedoraproject AND product=fedora AND version=31

vendor=Debian AND product=debian_linux AND version=10.0

Reference

https://www.ruby-lang.org/en/news/2020/03/31/heap-exposure-in-socket-cve-2020-10933/
FEDORA-2020-a95706b117-Mailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20200625-0001/
DSA-4721-Third Party Advisory

Keywords

CVE-2020-10933

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2020-10933

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures