Vulnerability Report

CVE-2021-31810

Title: FTP PASV Response Information Disclosure

Information Disclosure

Proof Of Concept

No public PoC currently indexed for CVE-2021-31810.

CWE Category NVD-CWE-noinfo
Published Date Jul 13, 2021
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 5.8 CVSS v3.1
Exploit Probability (EPSS)
0.67%

Vulnerability Summary

CVE-2021-31810: 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).

Impacted Vendors

Y
yukihiro_matsumoto 1
R
ruby-lang 1
O
oracle 1

Reference Links

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 https://security.netapp.com/advisory/ntap-20210917-0001/ https://www.oracle.com/security-alerts/cpuapr2022.html https://www.ruby-lang.org/en/news/2021/07/07/trusting-pasv-responses-in-net-ftp/ 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 https://security.netapp.com/advisory/ntap-20210917-0001/ https://www.oracle.com/security-alerts/cpuapr2022.html https://www.ruby-lang.org/en/news/2021/07/07/trusting-pasv-responses-in-net-ftp/
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
5.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
5.0
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:P/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-31810 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Affected Stack

No specific products linked.