What is CVE-2021-4181?

CVE-2021-4181 is a high-severity software vulnerability (Out-of-bounds read) with a CVSS score of 7.5. Crash in the Sysdig Event dissector in Wireshark 3.6.0 and 3.4.0 to 3.4.10 allows denial of service via packet injection or crafted capture file

Is CVE-2021-4181 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 4%.

What products does CVE-2021-4181 affect?

Tracked products affected include Wireshark. Check the version you run to see whether it is affected.

How do I fix CVE-2021-4181?

Apply the vendor fix promptly. Upgrade affected products to a fixed version.

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CVE-2021-4181

HIGH severity · CVSS 7.5 · Out-of-bounds read

7.5CVSS HIGH

Summary

Crash in the Sysdig Event dissector in Wireshark 3.6.0 and 3.4.0 to 3.4.10 allows denial of service via packet injection or crafted capture file

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactNone

Integrity impactNone

Availability impactHigh

Exploit probability (EPSS)4%

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products we track (1)

Wireshark

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Additional information

NVD record
https://www.wireshark.org/security/wnpa-sec-2021-21.htmlAdvisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4181.jsonAdvisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00041.htmlAdvisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q6XGBKWSQFCVYUN4ZK3O3NJIFP3OAFVT/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R5AEK3XTOIOGCGUILUFISMGX54YJXWGJ/
https://security.gentoo.org/glsa/202210-04Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlAdvisory
https://gitlab.com/wireshark/wireshark/-/merge_requests/5429Advisory