Out-of-bounds Read Affecting libidn Open this link in a new tab package, versions <1.33

  • Attack Complexity


  • Confidentiality


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  • snyk-id


  • published

    2 Oct 2019

  • disclosed

    22 Jul 2016

  • credit

    Hanno Böck

How to fix?

Upgrade libidn to version 1.33 or higher.


libidn is an Encode/decode i18n domains using Stringprep, Punycode and IDNA.

Affected versions of this package are vulnerable to Out-of-bounds Read. The vulnerability is due to the use of fgets with fixed-size buffer, leading to out-of-bounds read and allows the attackers to get sensitive memory information .