CVE-2021-31810

MEDIUM

Ruby < 2.6.7, 2.7.x < 2.7.3, 3.x < 3.0.1 - Information Disclosure via FTP PASV Response

Title source: llm

Description

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).

References (8)

Core 8

Core References

Mailing List, Third Party Advisory vendor-advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MWXHK5UUHVSHF7HTHMX6JY3WXDVNIHSL/

Mailing List, Third Party Advisory mailing-list

https://lists.debian.org/debian-lts-announce/2021/10/msg00009.html

Mailing List mailing-list

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

Third Party Advisory vendor-advisory

https://security.gentoo.org/glsa/202401-27

Exploit, Patch, Third Party Advisory

https://hackerone.com/reports/1145454

Third Party Advisory

https://security.netapp.com/advisory/ntap-20210917-0001/

Patch, Third Party Advisory

https://www.oracle.com/security-alerts/cpuapr2022.html

Vendor Advisory

https://www.ruby-lang.org/en/news/2021/07/07/trusting-pasv-responses-in-net-ftp/

Scores

CVSS v3 5.8

EPSS 0.0065

EPSS Percentile 71.1%

Attack Vector NETWORK

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

Details

Status published

Products (3)

debian/debian_linux 9.0

oracle/jd_edwards_enterpriseone_tools < 9.2.6.1

ruby-lang/ruby < 2.6.7

Published Jul 13, 2021

Tracked Since Feb 18, 2026