CVE-2021-39921
High
Description
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
SeverityHigh
CVSS7.5
Exploit probability—
Product
Wireshark
PublishedNov 19, 2021
First seenNov 19, 2021
How to fix
Vendor advisories
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/
- debian.org/security/2021/dsa-5019
- security.gentoo.org/glsa/202210-04
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| wireshark wireshark | 3.2.0 ≤ v ≤ 3.2.17, 3.4.0 ≤ v ≤ 3.4.9 | — |
| fedoraproject fedora | 34, 35 | — |
| debian debian_linux | 9.0 | — |
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