CVE-2021-39923
HIGH severity · CVSS 7.5 · CWE-834
7.5CVSS HIGH
Summary
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
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)2%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://gitlab.com/wireshark/wireshark/-/issues/17684 ↗
Additional information
- NVD record
- https://gitlab.com/wireshark/wireshark/-/issues/17684Patch
- https://www.wireshark.org/security/wnpa-sec-2021-11.htmlAdvisory
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39923.jsonAdvisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00015.htmlAdvisory
- https://www.debian.org/security/2021/dsa-5019Advisory