A filezilla security update has been released for Debian GNU/Linux 9 LTS to address to an untrusted search path.

DLA 3026-1: filezilla security update

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Debian LTS Advisory DLA-3026-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Andreas Rönnquist
May 26, 2022   https://wiki.debian.org/LTS
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Package : filezilla
Version : 3.24.0-1+deb9u1
CVE ID : CVE-2019-5429
Debian Bug :

Untrusted search path in FileZilla before 3.41.0-rc1 allows an
attacker to gain privileges via a malicious 'fzsftp' binary in
the user's home directory.

For Debian 9 stretch, this problem has been fixed in version
3.24.0-1+deb9u1.

We recommend that you upgrade your filezilla packages.

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

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