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

DLA 2849-1: wireshark security update

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Debian LTS Advisory DLA-2849-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Adrian Bunk
December 26, 2021   https://wiki.debian.org/LTS
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Package : wireshark
Version : 2.6.20-0+deb9u2
CVE ID : CVE-2021-22207 CVE-2021-22235 CVE-2021-39921 CVE-2021-39922
CVE-2021-39923 CVE-2021-39924 CVE-2021-39925 CVE-2021-39928
CVE-2021-39929
Debian Bug : 987853

Several vulnerabilities were fixed in the network traffic analyzer Wireshark.

CVE-2021-22207

Excessive memory consumption in the MS-WSP dissector.

CVE-2021-22235

Crash in the DNP dissector.

CVE-2021-39921

NULL pointer exception in the Modbus dissector.

CVE-2021-39922

Buffer overflow in the C12.22 dissector.

CVE-2021-39923

Large loop in the PNRP dissector.

CVE-2021-39924

Large loop in the Bluetooth DHT dissector.

CVE-2021-39925

Buffer overflow in the Bluetooth SDP dissector.

CVE-2021-39928

NULL pointer exception in the IEEE 802.11 dissector.

CVE-2021-39929

Uncontrolled Recursion in the Bluetooth DHT dissector.

For Debian 9 stretch, these problems have been fixed in version
2.6.20-0+deb9u2.

We recommend that you upgrade your wireshark packages.

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

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