VDB
ALPINE-CVE-2021-31810
ALPINE-CVE-2021-31810
PUBLISHED
CVSS 5.800000190734863 MEDIUM
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).
Risk Scores
CVSS v3.1
5.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.17 | ruby | *, 0, * |
| Alpine:v3.21 | ruby | 0, 0, 0 |
| Alpine:v3.18 | ruby | 2.2.2-r0, *, * |
| Alpine:v3.16 | ruby | 2.3.3-r3, 2.3.3-r1, 2.3.3-r0 |
| Alpine:v3.23 | ruby | 0, 0, 0 |
| Alpine:v3.20 | ruby | 0, 0, 0 |
| Alpine:v3.15 | ruby | *, *, 0 |
| Alpine:v3.22 | ruby | 0, 0, 0 |
| Alpine:v3.12 | ruby | 2.0.0, 1.8.7_p160-r2, 1.8.7_p174-r0 |
| Alpine:v3.14 | ruby | 2.3.3-r1, 2.3.3-r2, 2.3.3-r3 |
| Alpine:v3.19 | ruby | 1.8.7_p160-r3, 1.8.7_p160-r2, 1.8.7_p160-r3 |
| Alpine:v3.11 | ruby | 2.3.1-r1, 2.3.1-r2, 2.3.2-r0 |
| Alpine:v3.13 | ruby | 1.9.3_p374-r0, 1.9.3_p286-r2, 1.9.3_p286-r1 |
Timeline
- Jul 13, 2021 CVE Published
- Dec 3, 2025 CVE Updated
- Apr 30, 2026 Distribution Patch