CVE-2021-39922

moderate-risk

Published 2021-11-19

Buffer overflow in the C12.22 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

Do I need to act?

4.6% chance of exploitation in next 30 days

EPSS score — moderate exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.5/10 High

NETWORK / LOW complexity

Affected Products (6)

Wireshark

Fedora

Debian Linux

Affected Vendors

Debian Fedoraproject Wireshark

References (16)

Third Party Advisory https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39922.json

Exploit https://gitlab.com/wireshark/wireshark/-/issues/17636

Mailing List https://lists.debian.org/debian-lts-announce/2021/12/msg00015.html

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Third Party Advisory https://security.gentoo.org/glsa/202210-04

Third Party Advisory https://www.debian.org/security/2021/dsa-5019

Vendor Advisory https://www.wireshark.org/security/wnpa-sec-2021-12.html

Third Party Advisory https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39922.json

Exploit https://gitlab.com/wireshark/wireshark/-/issues/17636

Mailing List https://lists.debian.org/debian-lts-announce/2021/12/msg00015.html

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Third Party Advisory https://security.gentoo.org/glsa/202210-04

Third Party Advisory https://www.debian.org/security/2021/dsa-5019

Vendor Advisory https://www.wireshark.org/security/wnpa-sec-2021-12.html

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moderate-risk

Severity 26/34 · High

Exploitability 8/34 · Low

Exposure 13/34 · Low