A fribidi security update has been released for Debian GNU/Linux 9 LTS to address several issues.

DLA 2974-1: fribidi security update

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Debian LTS Advisory DLA-2974-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Thorsten Alteholz
April 10, 2022   https://wiki.debian.org/LTS
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Package : fribidi
Version : 0.19.7-1+deb9u2
CVE ID : CVE-2022-25308 CVE-2022-25309 CVE-2022-25310

Several issues have been found in fribidi, a free Implementation of the
Unicode BiDi algorithm. The issues are related to stack-buffer-overflow,
heap-buffer-overflow, and a SEGV.

CVE-2022-25308
stack-buffer-overflow issue in main()

CVE-2022-25309
heap-buffer-overflow issue in fribidi_cap_rtl_to_unicode()

CVE-2022-25310
SEGV issue in fribidi_remove_bidi_marks()

For Debian 9 stretch, these problems have been fixed in version
0.19.7-1+deb9u2.

We recommend that you upgrade your fribidi packages.

For the detailed security status of fribidi please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/fribidi

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS