Improper Input Validation Affecting libidn2 Open this link in a new tab package, versions *
Attack Complexity
Low
Integrity
High
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snyk-id
SNYK-DEBIAN10-LIBIDN2-474100
-
published
23 Oct 2019
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disclosed
22 Oct 2019
Introduced: 22 Oct 2019
CVE-2019-12290 Open this link in a new tabHow to fix?
There is no fixed version for Debian:10
libidn2
.
NVD Description
Note: Versions mentioned in the description apply to the upstream libidn2
package.
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.