CVE-2019-12290

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.

References

Affected packages

Git / gitlab.com/libidn/libidn2

Affected ranges

Type

GIT

Repo

https://gitlab.com/libidn/libidn2

Events

Introduced

Fixed

3db6427d9ef42483405bfa75f234792ac073239e

Fixed

241e8f486134793cb0f4a5b0e5817a97883401f5

Fixed

614117ef6e4c60e1950d742e3edf0a0ef8d389de

Database specific

{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.2.0"
        }
    ],
    "cpe": "cpe:2.3:a:gnu:libidn2:*:*:*:*:*:*:*:*",
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

2.*

2.2.0

libidn2-0.*

libidn2-0.10

libidn2-0.11

libidn2-0.12

libidn2-0.13

libidn2-0.14

libidn2-0.15

libidn2-0.16

libidn2-0.3

libidn2-0.4

libidn2-0.5

libidn2-0.6

libidn2-0.7

libidn2-0.8

libidn2-0.9

libidn2-2.*

libidn2-2.0.0

libidn2-2.0.1

libidn2-2.0.2

libidn2-2.0.3

libidn2-2.0.4

libidn2-2.0.5

libidn2-2.1.0

libidn2-2.1.1

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-12290.json"