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Medium: libidn2

Description

**Issue Overview:** idn2_to_ascii_4i in lib/lookup.c in GNU libidn2 before 2.1.1 has a heap-based buffer overflow via a long domain string. (CVE-2019-18224) 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.(CVE-2019-12290) **Affected Packages:** libidn2 **Issue Correction:** Run _yum update libidn2_ to update your system. **New Packages:** i686:     libidn2-devel-2.3.0-1.4.amzn1.i686     libidn2-debuginfo-2.3.0-1.4.amzn1.i686     idn2-2.3.0-1.4.amzn1.i686     libidn2-2.3.0-1.4.amzn1.i686 src:     libidn2-2.3.0-1.4.amzn1.src x86_64:     libidn2-2.3.0-1.4.amzn1.x86_64     libidn2-debuginfo-2.3.0-1.4.amzn1.x86_64     libidn2-devel-2.3.0-1.4.amzn1.x86_64     idn2-2.3.0-1.4.amzn1.x86_64


Affected Package


OS OS Version Package Name Package Version
Amazon Linux 1 libidn2-devel 2.3.0-1.4.amzn1
Amazon Linux 1 libidn2-debuginfo 2.3.0-1.4.amzn1
Amazon Linux 1 idn2 2.3.0-1.4.amzn1
Amazon Linux 1 libidn2 2.3.0-1.4.amzn1
Amazon Linux 1 libidn2 2.3.0-1.4.amzn1
Amazon Linux 1 libidn2 2.3.0-1.4.amzn1
Amazon Linux 1 libidn2-debuginfo 2.3.0-1.4.amzn1
Amazon Linux 1 libidn2-devel 2.3.0-1.4.amzn1
Amazon Linux 1 idn2 2.3.0-1.4.amzn1

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