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.
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*
cpe:2.3:a:oisf:suricata:5.0.0:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

History

22 Oct 2024, 17:11

Type Values Removed Values Added
CPE cpe:2.3:a:suricata-ids:suricata:5.0.0:*:*:*:*:*:*:*
cpe:2.3:a:suricata-ids:suricata:*:*:*:*:*:*:*:*
cpe:2.3:a:oisf:suricata:5.0.0:*:*:*:*:*:*:*
cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*
First Time Oisf suricata
Oisf

Information

Published : 2020-01-06 18:15

Updated : 2024-10-22 17:11


NVD link : CVE-2019-18792

Mitre link : CVE-2019-18792

CVE.ORG link : CVE-2019-18792


JSON object : View

Products Affected

debian

  • debian_linux

oisf

  • suricata
CWE
CWE-436

Interpretation Conflict