CVE-2019-16411 Information

Description

An issue was discovered in Suricata 4.1.4. By sending multiple IPv4 packets that have invalid IPv4Options the function IPV4OptValidateTimestamp in decode-ipv4.c tries to access a memory region that is not allocated. There is a check for o-len 5 (corresponding to 2 bytes of header and 3 bytes of data). Then \flag = *(o-data + 3)\ places one beyond the 3 bytes because the code should have been \flag = *(o-data + 1)\ instead.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://lists.openinfosecfoundation.org/pipermail/oisf-announce/ https://suricata-ids.org/2019/09/24/suricata-4-1-5-released/ https://www.code-intelligence.com/cve-2019-16411

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8