Denial of Service Vulnerability in Wireshark Modbus Dissector
CVE-2021-39921

7.5HIGH

Key Information:

Vendor

Wireshark
Status
Wireshark
Vendor
CVE Published:
19 November 2021

What is CVE-2021-39921?

The Modbus dissector in Wireshark versions 3.4.0 through 3.4.9 and versions 3.2.0 through 3.2.17 suffers from a NULL pointer exception. This flaw can be exploited through carefully crafted packets or capture files, potentially leading to service disruption.

Affected Version(s)

Wireshark >=3.4.0, <3.4.10 < 3.4.0, 3.4.10

Wireshark >=3.2.0, <3.2.18 < 3.2.0, 3.2.18

References

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

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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