CVE-2019-16411

9.8 criticalEPSS 2.0%

Critical (9.8) in suricata-ids suricata. EPSS 2.0% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

9.8 critical

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

EPSS: 2.0% chance of exploitation in the next 30 days; higher than 81% of CVEs (scores of 2026-10-31)
CWE: CWE-125
Published: 2019-09-24
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

suricata-ids:suricata

References

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
https://lists.openinfosecfoundation.org/pipermail/oisf-announce/
https://suricata-ids.org/2019/09/24/suricata-4-1-5-released/

Check your stack JSON