CVE-2018-9256: Input Validation
In Wireshark 2.4.0 to 2.4.5 and 2.2.0 to 2.2.13, the LWAPP dissector could crash. This was addressed in epan/dissectors/packet-lwapp.c by limiting the encapsulation levels to restrict the recursion depth.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Configuration
Apply the change in epan/dissectors/packet-lwapp.c that limits LWAPP encapsulation levels to restrict recursion depth (fixes crashes in Wireshark 2.4.0–2.4.5 and 2.2.0–2.2.13).
Wireshark (epan/dissectors/packet-lwapp.c) LWAPP encapsulation levels (recursion depth limit) = Limit encapsulation levels to restrict recursion depth
Event History
Frequently Asked Questions
What is the severity of CVE-2018-9256?
CVE-2018-9256 has a medium severity rating as it can cause Wireshark to crash due to a recursion depth issue in the LWAPP dissector.
How do I fix CVE-2018-9256?
To remediate CVE-2018-9256, update Wireshark to version 2.4.6 or later, or to version 2.2.14 or later.
What versions of Wireshark are affected by CVE-2018-9256?
Wireshark versions from 2.4.0 to 2.4.5 and from 2.2.0 to 2.2.13 are vulnerable to CVE-2018-9256.
What causes the crash in CVE-2018-9256?
The crash in CVE-2018-9256 is caused by an excessive recursion depth in the LWAPP dissector.
Is CVE-2018-9256 applicable to Debian users?
Yes, Debian users running the affected versions of Wireshark are at risk due to CVE-2018-9256.