NULL Pointer Dereference Affecting wireshark package, versions <2.4.1-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published15 Jul 2026
- disclosed30 Aug 2017
Introduced: 30 Aug 2017
CVE-2017-13764 (opens in a new tab)How to fix?
Upgrade Echo:latest wireshark to version 2.4.1-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream wireshark package and not the wireshark package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
In Wireshark 2.4.0, the Modbus dissector could crash with a NULL pointer dereference. This was addressed in epan/dissectors/packet-mbtcp.c by adding length validation.
References
- https://advisory.echohq.com/cve/CVE-2017-13764
- https://www.cve.org/CVERecord?id=CVE-2017-13764
- https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=b87ffbd12bddf64582c0a6e082b462744474de94
- http://www.securityfocus.com/bid/100545
- http://www.securitytracker.com/id/1039254
- https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=13925
- https://code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=b87ffbd12bddf64582c0a6e082b462744474de94
- https://www.wireshark.org/security/wnpa-sec-2017-40.html