Null pointer dereference in Wireshark - CVE-2017-17997

Vulnerability identifier: #VU11466

CSH Severity: Low

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2017-17997

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in epan/dissectors/packet-mrdisc.c due to the MRDISC dissector misuses a NULL pointer and crashes. A remote attacker can trigger NULL pointer dereference and cause the service to crash.

Wireshark
wireshark (Alpine package)
wireshark
Fedora

Update to 2.2.12.

wireshark (Alpine package) - update to 2.2.12-r0
wireshark - addressed in versions 2.4.5-3.fc27, 2.4.5-3.fc28

• https://www.wireshark.org/security/wnpa-sec-2018-02.html

• Denial of service in Wireshark
• Null pointer dereference in wireshark (Alpine package)
• Fedora 28 update for wireshark
• Fedora 27 update for wireshark