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Amazon Linux AMI: CVE-2019-12290: Security patch for libidn2 (ALAS-2019-1327)

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Amazon Linux AMI: CVE-2019-12290: Security patch for libidn2 (ALAS-2019-1327)

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:P/A:N)
Published
10/22/2019
Created
12/24/2019
Added
12/20/2019
Modified
12/20/2019

Description

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.

Solution(s)

  • amazon-linux-upgrade-libidn2

References

  • amazon-linux-upgrade-libidn2

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