CVE-2021-31810 Information

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).

CVSS Vector

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

Reference

https://www.ruby-lang.org/en/news/2021/07/07/trusting-pasv-responses-in-net-ftp/ https://hackerone.com/reports/1145454 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWXHK5UUHVSHF7HTHMX6JY3WXDVNIHSL/ https://security.netapp.com/advisory/ntap-20210917-0001/ https://lists.debian.org/debian-lts-announce/2021/10/msg00009.html https://www.oracle.com/security-alerts/cpuapr2022.html 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).

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

5.8