CVE-2015-8738 Information

Description

The s7comm_decode_ud_cpu_szl_subfunc function in epan/dissectors/packet-s7comm_szl_ids.c in the S7COMM dissector in Wireshark 2.0.x before 2.0.1 does not validate the list count in an SZL response which allows remote attackers to cause a denial of service (divide-by-zero error and application crash) via a crafted packet.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Reference

http://www.securitytracker.com/id/1034551 http://www.wireshark.org/security/wnpa-sec-2015-56.html https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=11823 https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=858c3f0079f987833fb22eba2c361d1a88ba4103 https://security.gentoo.org/glsa/201604-05

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5