Executive Summary

This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Title GNU IDN Library 2: Multiple vulnerabilities
Name GLSA-202003-63 First vendor Publication 2020-03-30
Vendor Gentoo Last vendor Modification 2020-03-30
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 9.8
Base Score 9.8 Environmental Score 9.8
impact SubScore 5.9 Temporal Score 9.8
Exploitabality Sub Score 3.9
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score 7.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores



Multiple vulnerabilities have been found in GNU IDN Library 2, the worst of which could result in the remote execution of arbitrary code.


GNU IDN Library 2 is an implementation of the IDNA2008 + TR46
specifications (RFC 5890, RFC 5891, RFC 5892, RFC 5893, TR 46).


Multiple vulnerabilities have been discovered in GNU IDN Library 2.
Please review the CVE identifiers referenced below for details.


A remote attacker could send specially crafted input, possibly resulting in execution of arbitrary code with the privileges of the process, impersonation of domains or a Denial of Service condition.


There is no known workaround at this time.


All GNU IDN Library 2 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dns/libidn2-2.2.0"


[ 1 ] CVE-2019-12290 : https://nvd.nist.gov/vuln/detail/CVE-2019-12290
[ 2 ] CVE-2019-18224 : https://nvd.nist.gov/vuln/detail/CVE-2019-18224


This GLSA and any updates to it are available for viewing at the Gentoo Security Website:


Original Source

Url : http://security.gentoo.org/glsa/glsa-202003-63.xml

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)
50 % CWE-20 Improper Input Validation

CPE : Common Platform Enumeration

Application 1

Alert History

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Date Informations
2020-05-23 13:03:43
  • Multiple Updates
2020-03-30 17:19:20
  • First insertion