A gerbv security update has been released for Debian GNU/Linux 9 LTS.

DLA 2839-1: gerbv security update

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Debian LTS Advisory DLA-2839-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Anton Gladky
December 03, 2021   https://wiki.debian.org/LTS
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Package : gerbv
Version : 2.6.1-2+deb9u1
CVE ID : CVE-2021-40391

One security issue has been discovered in gerbv: a viewer for Gerber RS-274X files.

It was discovered that an out-of-bounds write vulnerability exists in the drill
format T-code tool. A specially-crafted drill file can lead to code execution.
An attacker can provide a malicious file to trigger this vulnerability.

For Debian 9 stretch, this problem has been fixed in version
2.6.1-2+deb9u1.

We recommend that you upgrade your gerbv packages.

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

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