VulnerabilityModified
CVE-2021-31810
A malicious FTP server can use the PASV response to trick Net::FTP into connecting back to a given IP address and port.
MEDIUM 5.8EPSS 3.05%
Does this matter?
Lower severity and a low EPSS score (3.05%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
- EPSS
- 3.05% probability · 87th percentile
- CISA KEV
- Not listed
- Affected
- ruby-lang/ruby · debian/debian linux · oracle/jd edwards enterpriseone tools
- Source
- cve@mitre.org
References
- https://hackerone.com/reports/1145454Exploit, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00009.htmlMailing List, Third Party Advisory
- 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
- https://security.netapp.com/advisory/ntap-20210917-0001/Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://www.ruby-lang.org/en/news/2021/07/07/trusting-pasv-responses-in-net-ftp/Vendor Advisory
- https://hackerone.com/reports/1145454Exploit, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00009.htmlMailing List, Third Party Advisory
- 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
- https://security.netapp.com/advisory/ntap-20210917-0001/Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://www.ruby-lang.org/en/news/2021/07/07/trusting-pasv-responses-in-net-ftp/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.