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GoogleOSV:USN-5232-1

HistorySep 12, 2022 - 7:45 a.m.

fail2ban vulnerability

2022-09-1207:45:30

Google

osv.dev

fail2ban

vulnerability

jakub żoczek

whois responses

mail actions

remote attacker

arbitrary code

software

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

8.1

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

7.8

Confidence

Low

EPSS

0.018

Percentile

88.1%

JSON

Jakub Żoczek discovered that certain Fail2ban actions handled whois responses in
an insecure way. If Fail2ban was configured to use certain mail actions
like ‘mail-whois’ on a target system, a remote attacker who was able to control whois
responses to this target system could possibly execute arbitrary code.