7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
0.003 Low
EPSS
Percentile
71.4%
GNU libidn2 before 2.2.0 fails to perform the roundtrip checks specified in RFC3490 Section 4.2 when converting A-labels to U-labels. This makes it possible in some circumstances for one domain to impersonate another. By creating a malicious domain that matches a target domain except for the inclusion of certain punycoded Unicode characters (that would be discarded when converted first to a Unicode label and then back to an ASCII label), arbitrary domains can be impersonated.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Alpine | edge-main | noarch | libidn2 | < 2.2.0-r0 | UNKNOWN |
Alpine | 3.12-main | noarch | libidn2 | < 2.2.0-r0 | UNKNOWN |
Alpine | 3.13-main | noarch | libidn2 | < 2.2.0-r0 | UNKNOWN |
Alpine | 3.14-main | noarch | libidn2 | < 2.2.0-r0 | UNKNOWN |
Alpine | 3.15-main | noarch | libidn2 | < 2.2.0-r0 | UNKNOWN |
Alpine | 3.16-main | noarch | libidn2 | < 2.2.0-r0 | UNKNOWN |
Alpine | 3.17-main | noarch | libidn2 | < 2.2.0-r0 | UNKNOWN |
Alpine | 3.18-main | noarch | libidn2 | < 2.2.0-r0 | UNKNOWN |
Alpine | 3.19-main | noarch | libidn2 | < 2.2.0-r0 | UNKNOWN |
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
0.003 Low
EPSS
Percentile
71.4%