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CVE Vulnerabilities

CVE-2021-39921

NULL Pointer Dereference

Published: Nov 19, 2021 | Modified: Nov 21, 2024
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
7.5 MODERATE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2021-39921
CWEhttps://cwe.mitre.org/data/definitions/476.html

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

Weakness

The product dereferences a pointer that it expects to be valid but is NULL.

Affected Software

NameVendorStart VersionEnd Version
WiresharkWireshark3.2.0 (including)3.2.17 (including)
WiresharkWireshark3.4.0 (including)3.4.9 (including)
WiresharkUbuntubionic*
WiresharkUbuntufocal*
WiresharkUbuntuhirsute*
WiresharkUbuntuimpish*
WiresharkUbuntukinetic*
WiresharkUbuntulunar*
WiresharkUbuntumantic*
WiresharkUbuntuoracular*
WiresharkUbuntuplucky*
WiresharkUbuntutrusty*
WiresharkUbuntutrusty/esm*
WiresharkUbuntuupstream*
WiresharkUbuntuxenial*

Potential Mitigations

References

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