CVE-2019-16411
highpriority · track · 40EPSS 0.020 · 81 %ileEUUSEPSS · scored 2026-10-22
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://lists.openinfosecfoundation.org/pipermail/oisf-announce/cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2019-16411cnnvd
- https://suricata-ids.org/2019/09/24/suricata-4-1-5-released/cnnvd
- https://www.code-intelligence.com/cve-2019-16411cnnvd
- https://lists.openinfosecfoundation.org/pipermail/oisf-announce/enisa_euvd
- https://suricata-ids.org/2019/09/24/suricata-4-1-5-released/enisa_euvd
- https://www.code-intelligence.com/cve-2019-16411enisa_euvd
- https://lists.openinfosecfoundation.org/pipermail/oisf-announce/Third Party Advisorynvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan