CVE-2021-31810 : An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x thro

An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. A malicious FTP server can use the PASV response to trick Net::FTP into connecting back to a given IP address and port. This potentially makes curl extract information about services that are otherwise private and not disclosed (e.g., the attacker can conduct port scans and service banner extractions).

Published 2021-07-13 13:15:09

Updated 2024-01-24 05:15:10

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2021-31810

Debian » Debian Linux » Version: 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Matching versions
Oracle » Jd Edwards Enterpriseone Tools
Versions before (<) 9.2.6.1
cpe:2.3:a:oracle:jd_edwards_enterpriseone_tools:*:*:*:*:*:*:*:*
Matching versions
Ruby-lang » Ruby
Versions from including (>=) 3.0.0 and up to, including, (<=) 3.0.1
cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
Matching versions
When used together with: Fedoraproject » Fedora » Version: 34
Ruby-lang » Ruby
Versions from including (>=) 2.7.0 and up to, including, (<=) 2.7.3
cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
Matching versions
When used together with: Fedoraproject » Fedora » Version: 34
Ruby-lang » Ruby
Versions up to, including, (<=) 2.6.7
cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
Matching versions
When used together with: Fedoraproject » Fedora » Version: 34

Exploit prediction scoring system (EPSS) score for CVE-2021-31810

EPSS FAQ

0.68%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 70 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-31810

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:P/I:N/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: None
5.8	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N	3.9	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Changed Confidentiality: Low Integrity: None Availability: None

References for CVE-2021-31810

https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html

[SECURITY] [DLA 3408-1] jruby security update

CVEs referencing this url
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWXHK5UUHVSHF7HTHMX6JY3WXDVNIHSL/

Mailing List;Third Party Advisory

CVEs referencing this url
https://www.oracle.com/security-alerts/cpuapr2022.html

Oracle Critical Patch Update Advisory - April 2022
Patch;Third Party Advisory

CVEs referencing this url
https://lists.debian.org/debian-lts-announce/2021/10/msg00009.html

[SECURITY] [DLA 2780-1] ruby2.3 security update
Mailing List;Third Party Advisory

CVEs referencing this url
https://security.gentoo.org/glsa/202401-27

Ruby: Multiple vulnerabilities (GLSA 202401-27) — Gentoo security

CVEs referencing this url
https://hackerone.com/reports/1145454

#1145454 lib/net/ftp.rb: trusting PASV responses allow client abuse
Exploit;Patch;Third Party Advisory
https://www.ruby-lang.org/en/news/2021/07/07/trusting-pasv-responses-in-net-ftp/

CVE-2021-31810: Trusting FTP PASV responses vulnerability in Net::FTP
Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MWXHK5UUHVSHF7HTHMX6JY3WXDVNIHSL/

[SECURITY] Fedora 34 Update: ruby-3.0.2-149.fc34 - package-announce - Fedora Mailing-Lists
https://security.netapp.com/advisory/ntap-20210917-0001/

CVE-2021-31810 Ruby Vulnerability in NetApp Products | NetApp Product Security
Third Party Advisory

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Vulnerability Details : CVE-2021-31810

Products affected by CVE-2021-31810

Exploit prediction scoring system (EPSS) score for CVE-2021-31810

CVSS scores for CVE-2021-31810

References for CVE-2021-31810