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Improper Input Validation The advisory has been revoked - it doesn't affect any version of package libidn2-tools  (opens in a new tab)

Threat Intelligence

EPSS
0.69% (81st percentile)

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  • Snyk IDSNYK-SLES150-LIBIDN2TOOLS-2723706
  • published14 Apr 2022
  • disclosed28 Nov 2019
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Introduced: 28 Nov 2019

CVE-2019-12290  (opens in a new tab)
CWE-20  (opens in a new tab)

Amendment

The SLES security team deemed this advisory irrelevant for SLES:15.0.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libidn2-tools package and not the libidn2-tools package as distributed by SLES.

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