Headline
CVE-2021-39921: Wireshark · wnpa-sec-2021-14 · Modbus dissector crash
NULL pointer exception in the Modbus dissector in Wireshark 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17 allows denial of service via packet injection or crafted capture file
wnpa-sec-2021-14 · Modbus dissector crash
Summary
Name: Modbus dissector crash
Docid: wnpa-sec-2021-14
Date: November 17, 2021
Affected versions: 3.4.0 to 3.4.9, 3.2.0 to 3.2.17
Fixed versions: 3.4.10, 3.2.18
References:
Wireshark issue 17703
CVE-2021-39921
Details****Description
The Modbuss dissector could crash.
Impact
It may be possible to make Wireshark crash by injecting a malformed packet onto the wire or by convincing someone to read a malformed packet trace file.
Resolution
Upgrade to Wireshark 3.4.10, 3.2.18 or later.