Null pointer dereference in Wireshark - CVE-2017-9343

Vulnerability identifier: #VU6905

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2017-9343

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 due to NULL pointer dereference in the MSNIP dissector when validating an IPv4 address. A remote attacker can inject a malformed packet epan/dissectors/packet-msnip.c onto the wire or persuade the target user to read a malformed packet trace file and cause the application to crash.

Successful exploitation of the vulnerability results in denial of service.

Wireshark
Arch Linux
Fedora
wireshark (Alpine package)
wireshark

Update to version 2.0.13, 2.2.7 or later.

wireshark (Alpine package) - update to 2.0.13-r0
wireshark - update to 2.2.7-1.fc26

• https://www.wireshark.org/security/wnpa-sec-2017-30.html

• Multiple vulnerabilities in Wireshark
• Arch Linux update for wireshark-cli
• Null pointer dereference in wireshark (Alpine package)
• Fedora 26 update for wireshark