A xterm security update has been released for Debian GNU/Linux 9 LTS to address an issue where an attacker can trigger a buffer overflow.

DLA 2913-1: xterm security update

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Debian LTS Advisory DLA-2913-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Utkarsh Gupta
February 07, 2022   https://wiki.debian.org/LTS
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Package : xterm
Version : 327-2+deb9u2
CVE ID : CVE-2022-24130
Debian Bug : 1004689

xterm, an X terminal emulator, when Sixel support is enabled, allows
attackers to trigger a buffer overflow in set_sixel in graphics_sixel.c
via crafted text.

For Debian 9 stretch, this problem has been fixed in version
327-2+deb9u2.

We recommend that you upgrade your xterm packages.

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

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