CVE-2018-7421 — In Wireshark 2

In Wireshark 2.2.0 to 2.2.12 and 2.4.0 to 2.4.4, the DMP dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-dmp.c by correctly supporting a bounded number of Security Categories for a DMP Security Classification.

01What is this vulnerability?

In Wireshark 2.2.0 to 2.2.12 and 2.4.0 to 2.4.4, the DMP dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-dmp.c by correctly supporting a bounded number of Security Categories for a DMP Security Classification.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-02-23T22:00:00.000Z
• Last modified: 2024-08-05T06:24:12.049Z

09References

• code.wireshark.org — https://code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=656812ee…
• www.wireshark.org — https://www.wireshark.org/security/wnpa-sec-2018-06.html
• code.wireshark.org — https://code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=e8be5ada…
• bugs.wireshark.org — https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=14408