CVE-2019-18792
An issue was discovered in Suricata 5.0.0. It is possible to bypass/evade any tcp based signature by overlapping a TCP segment with a fake FIN packet. The fake FIN packet is injected just before the PUSH ACK packet we want to bypass. The PUSH ACK packet (containing the data) will be ignored by Suricata because it overlaps the FIN packet (the sequence and ack number are identical in the two packets). The client will ignore the fake FIN packet because the ACK flag is not set. Both linux and windows clients are ignoring the injected packet.
- Affected products
- Suricata
- Oisf Suricata
- < 4.1.6, 5.0.0
- CVSS 3.1
- 9.1 CRITICAL
- EPSS
- 2.5% (83th percentile)
- Weakness
- CWE-436
- NVD status
- Modified
- Published
- 2020-01-06
No indexed exploits for CVE-2019-18792 yet
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No exploit for CVE-2019-18792 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.