CVE-2020-25862

HIGH 7.5CVE-2020-25862 · Published 06/10/2020 · updated 17/06/2026

In short

CVE-2020-25862 is a HIGH (CVSS 7.5) vulnerability affecting wireshark (wireshark).
Chance of exploitation in the next 30 days (EPSS): 2.4%, higher than 83.7% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
wireshark wireshark	`≥ 2.6.0, ≤ 2.6.20≥ 3.0.0, ≤ 3.0.13≥ 3.2.0, ≤ 3.2.6`	No fix yet

Description

In Wireshark 3.2.0 to 3.2.6, 3.0.0 to 3.0.13, and 2.6.0 to 2.6.20, the TCP dissector could crash. This was addressed in epan/dissectors/packet-tcp.c by changing the handling of the invalid 0xFFFF checksum.

References

lists.opensuse.org/opensuse-security-announce/2020-11/msg00035.html · Mailing List
lists.opensuse.org/opensuse-security-announce/2020-11/msg00038.html · Mailing List
gitlab.com/wireshark/wireshark/-/commit/7f3fe6164a68b76d9988c4253b24d43f498f1753 · Patch
gitlab.com/wireshark/wireshark/-/issues/16816 · Exploit
lists.debian.org/debian-lts-announce/2021/02/msg00008.html · Mailing List
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DQHPKZFQ7W3X34RYN3FWFYCFJD4FXJW
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IGRYKW4XLR44YDWTAH547ODYYBYPB2D
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZUHMK5HYTUUDXA64T2TAMAFMYV674QBW
oracle.com/security-alerts/cpujan2021.html

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