CVSS2
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
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
Confidence
High
EPSS
Percentile
88.1%
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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Ubuntu | 20.04 | noarch | fail2ban | < 0.11.1-1ubuntu0.1~esm1 | UNKNOWN |
Ubuntu | 20.04 | noarch | fail2ban | < 0.11.1-1 | UNKNOWN |
Ubuntu | 18.04 | noarch | fail2ban | < 0.10.2-2ubuntu0.1~esm1 | UNKNOWN |
Ubuntu | 18.04 | noarch | fail2ban | < 0.10.2-2 | UNKNOWN |
Ubuntu | 16.04 | noarch | fail2ban | < 0.9.3-1ubuntu0.1~esm1 | UNKNOWN |
Ubuntu | 16.04 | noarch | fail2ban | < 0.9.3-1 | UNKNOWN |
Ubuntu | 14.04 | noarch | fail2ban | < 0.8.11-1ubuntu0.1~esm1 | UNKNOWN |
Ubuntu | 14.04 | noarch | fail2ban | < 0.8.11-1 | UNKNOWN |
CVSS2
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
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
Confidence
High
EPSS
Percentile
88.1%