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.

CVSS v3.0 5.3 MEDIUM
CVSS v2.0 5.0 MEDIUM

5.3^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://www.ruby-lang.org/en/news/2020/03/31/heap-exposure-in-socket-cve-2020-10933/	Exploit Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F4TNVTT66VPRMX5UZYSDGSVRXKKDDDU5/	Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20200625-0001/	Third Party Advisory
https://www.debian.org/security/2020/dsa-4721	Third Party Advisory

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Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:a:ruby-lang:ruby::::::::
	cpe:2.3:a:ruby-lang:ruby::::::::
	cpe:2.3:a:ruby-lang:ruby:2.7.0:::::::*

cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Information

Published : 2020-05-04 08:15

Updated : 2022-05-03 07:21

NVD link : CVE-2020-10933

Mitre link : CVE-2020-10933

JSON object : View

CWE

CWE-908

Use of Uninitialized Resource

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Products Affected

fedoraproject

fedora

debian

debian_linux

ruby-lang

ruby

linux

linux_kernel

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