CVSS 3.1
5.8 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:NCVE-2021-31810
Medium (5.8). EPSS 3.0% chance of exploitation in the next 30 days.
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).
Severity
- EPSS
- 3.0% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-10-31)
- Published
- Modified
- Record from
- the NVD, synced
Affected
- debian:debian_linux
- oracle:jd_edwards_enterpriseone_tools
- ruby-lang:ruby
References
- https://hackerone.com/reports/1145454
- https://lists.debian.org/debian-lts-announce/2021/10/msg00009.html
- https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MWXHK5UUHVSHF7HTHMX6JY3WXDVNIHSL/
- https://security.gentoo.org/glsa/202401-27