CVE-2019-10056 Information

Description

An issue was discovered in Suricata 4.1.3. The code mishandles the case of sending a network packet with the right type such that the function DecodeEthernet in decode-ethernet.c is executed a second time. At this point the algorithm cuts the first part of the packet and doesn’t determine the current length. Specifically if the packet is exactly 28 long in the first iteration it subtracts 14 bytes. Then it is working with a packet length of 14. At this point the case distinction says it is a valid packet. After that it casts the packet but this packet has no type and the program crashes at the type case distinction.

CVSS Vector

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

Reference

https://redmine.openinfosecfoundation.org/issues/2946 https://suricata-ids.org/2019/04/30/suricata-4-1-4-released/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5