VulnerabilityModified
CVE-2021-39923
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
HIGH 7.5EPSS 1.58%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.58%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.58% probability · 74th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-834
- Affected
- wireshark/wireshark · debian/debian linux
- Source
- cve@gitlab.com
References
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39923.jsonThird Party Advisory
- https://gitlab.com/wireshark/wireshark/-/issues/17684Issue Tracking, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00015.htmlMailing List, Third Party Advisory
- https://www.debian.org/security/2021/dsa-5019Third Party Advisory
- https://www.wireshark.org/security/wnpa-sec-2021-11.htmlVendor Advisory
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39923.jsonThird Party Advisory
- https://gitlab.com/wireshark/wireshark/-/issues/17684Issue Tracking, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00015.htmlMailing List, Third Party Advisory
- https://www.debian.org/security/2021/dsa-5019Third Party Advisory
- https://www.wireshark.org/security/wnpa-sec-2021-11.htmlVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.