CVE - CVE-2019-18792

CVE-ID
CVE-2019-18792	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://github.com/OISF/suricata/commit/1c63d3905852f746ccde7e2585600b2199cefb4b CONFIRM:https://github.com/OISF/suricata/commit/fa692df37a796c3330c81988d15ef1a219afc006 MISC:https://redmine.openinfosecfoundation.org/issues/3324 MISC:https://redmine.openinfosecfoundation.org/issues/3394 MLIST:[debian-lts-announce] 20200130 [SECURITY] [DLA 2087-1] suricata security update URL:https://lists.debian.org/debian-lts-announce/2020/01/msg00032.html
Assigning CNA
MITRE Corporation
Date Record Created
20191106	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20191106)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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