ELA-1609-1 libidn2 security update

domain impersonation

2026-01-12
Packagelibidn2
Version2.0.5-1+deb10u2 (buster)
Related CVEs CVE-2019-12290


It was found that libidn2, a library for internationalized domain names (IDNA2008/TR46), was vulnerable to a domain impersonation attack, where especially crafted domain names could impersonate other domains.



For Debian 10 buster, these problems have been fixed in version 2.0.5-1+deb10u2.

We recommend that you upgrade your libidn2 packages.

Further information about Extended LTS security advisories can be found in the dedicated section of our website.