CVE-2021-39921

NameCVE-2021-39921
DescriptionNULL 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
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2849-1, DSA-5019-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
wireshark (PTS)bullseye3.4.10-0+deb11u1fixed
bullseye (security)3.4.16-0+deb11u1fixed
bookworm4.0.17-0+deb12u1fixed
bookworm (security)4.0.11-1~deb12u1fixed
sid, trixie4.4.2-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
wiresharksourcestretch2.6.20-0+deb9u2DLA-2849-1
wiresharksourcebuster2.6.20-0+deb10u3
wiresharksourcebullseye3.4.10-0+deb11u1DSA-5019-1
wiresharksource(unstable)3.6.0-1

Notes

https://gitlab.com/wireshark/wireshark/-/issues/17703
https://www.wireshark.org/security/wnpa-sec-2021-14.html

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