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redhatcveRedhat.comRH:CVE-2021-31810
HistoryJul 07, 2021 - 9:53 p.m.

CVE-2021-31810

2021-07-0721:53:02
redhat.com
access.redhat.com
44
ruby
net::ftp
vulnerability
ftp server
arbitrary hosts
port scanning
information extraction

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS3

5.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

EPSS

0.01

Percentile

83.7%

Ruby’s Net::FTP module trusted the IP address included in the FTP server’s response to the PASV command. A malicious FTP server could use this to make Ruby applications using the Net::FTP module to connect to arbitrary hosts and use this to perform port scanning or information extraction from systems not accessible from the FTP server.

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS3

5.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

EPSS

0.01

Percentile

83.7%