CVE-2021-39923

moderate-risk
Published 2021-11-19

Large loop in the PNRP 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?

~
2.2% 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
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (4)

Affected Vendors

Debian Wireshark

References (10)

Third Party Advisory https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39923.json
Issue Tracking https://gitlab.com/wireshark/wireshark/-/issues/17684
Mailing List https://lists.debian.org/debian-lts-announce/2021/12/msg00015.html
Third Party Advisory https://www.debian.org/security/2021/dsa-5019
Vendor Advisory https://www.wireshark.org/security/wnpa-sec-2021-11.html
Third Party Advisory https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39923.json
Issue Tracking https://gitlab.com/wireshark/wireshark/-/issues/17684
Mailing List https://lists.debian.org/debian-lts-announce/2021/12/msg00015.html
Third Party Advisory https://www.debian.org/security/2021/dsa-5019
Vendor Advisory https://www.wireshark.org/security/wnpa-sec-2021-11.html
41
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 5/34 · Minimal
Exposure 10/34 · Low