Vulnerabilities > CVE-2021-31810

047910
CVSS 5.8 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
LOW
Integrity impact
NONE
Availability impact
NONE
network
low complexity
ruby-lang
debian
oracle

Summary

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).

Vulnerable Configurations

Part Description Count
Application
Ruby-Lang
1024
Application
Oracle
11
OS
Fedoraproject
1
OS
Debian
1