Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2021-31810

Published: Jul 13, 2021 | Modified: Nov 21, 2024
CVSS 3.x
5.8
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N
RedHat/V2
RedHat/V3
5.4 MODERATE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Ubuntu
LOW
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2021-31810
CWEhttps://cwe.mitre.org/data/definitions/NVD-Other.html

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).

Affected Software

NameVendorStart VersionEnd Version
RubyRuby-lang*2.6.7 (including)
RubyRuby-lang2.7.0 (including)2.7.3 (including)
RubyRuby-lang3.0.0 (including)3.0.1 (including)
Red Hat Enterprise Linux 8RedHatruby:2.7-8040020210728141159.522a0ee4*
Red Hat Enterprise Linux 8RedHatruby:2.6-8050020211215144356.c5368500*
Red Hat Enterprise Linux 8RedHatruby:2.5-8050020220216195847.c5368500*
Red Hat Enterprise Linux 8.1 Update Services for SAP SolutionsRedHatruby:2.6-8010020220201152941.c27ad7f8*
Red Hat Enterprise Linux 8.2 Extended Update SupportRedHatruby:2.6-8020020220201131207.4cda2c84*
Red Hat Enterprise Linux 8.4 Extended Update SupportRedHatruby:2.6-8040020220131135901.522a0ee4*
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHatrh-ruby27-ruby-0:2.7.4-130.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHatrh-ruby30-ruby-0:3.0.2-148.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHatrh-ruby26-ruby-0:2.6.9-120.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSRedHatrh-ruby27-ruby-0:2.7.4-130.el7*
Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSRedHatrh-ruby30-ruby-0:3.0.2-148.el7*
Ruby1.9.1Ubuntutrusty*
Ruby2.0Ubuntutrusty*
Ruby2.3Ubuntuesm-infra/xenial*
Ruby2.3Ubuntuxenial*
Ruby2.5Ubuntubionic*
Ruby2.5Ubuntuesm-infra/bionic*
Ruby2.7Ubuntuesm-infra/focal*
Ruby2.7Ubuntufocal*
Ruby2.7Ubuntugroovy*
Ruby2.7Ubuntuhirsute*
Ruby2.7Ubuntuimpish*

References

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