A libidn2 security update has been released for Debian GNU/Linux 10 to address a heap-based buffer overflow vulnerability.
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Debian Security Advisory DSA-4613-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
February 01, 2020 https://www.debian.org/security/faq
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Package : libidn2
CVE ID : CVE-2019-18224
Debian Bug : 942895
A heap-based buffer overflow vulnerability was discovered in the
idn2_to_ascii_4i() function in libidn2, the GNU library for
Internationalized Domain Names (IDNs), which could result in denial of
service, or the execution of arbitrary code when processing a long
domain string.
For the stable distribution (buster), this problem has been fixed in
version 2.0.5-1+deb10u1.
We recommend that you upgrade your libidn2 packages.
For the detailed security status of libidn2 please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/libidn2
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
