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Vulnerability record · CVE-2019-16411 · published 24 September 2019

CVE-2019-16411: Suricata-ids suricata out-of-bounds read vulnerability

SSuricata Ids · Suricata

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.

9.8 CVSS 3.1 Critical EPSS 2.0% · top 19.5% CWE-125 · Out-of-bounds read
9.8CVSS 3.1 base score, v2 7.5
2.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-16411), CISA KEV, FIRST EPSS (scores of 2026-10-10). This page is refreshed as NVD updates the record.