Executive Summary

Informations
Name CVE-2019-18792 First vendor Publication 2020-01-06
Vendor Cve Last vendor Modification 2024-11-21

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Overall CVSS Score 9.1
Base Score 9.1 Environmental Score 9.1
impact SubScore 5.2 Temporal Score 9.1
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:N/I:P/A:P)
Cvss Base Score 6.4 Attack Range Network
Cvss Impact Score 4.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18792

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-436 Interpretation Conflict

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 26
Os 1

Sources (Detail)

https://github.com/OISF/suricata/commit/1c63d3905852f746ccde7e2585600b2199cefb4b
https://github.com/OISF/suricata/commit/fa692df37a796c3330c81988d15ef1a219afc006
https://lists.debian.org/debian-lts-announce/2020/01/msg00032.html
https://redmine.openinfosecfoundation.org/issues/3324
https://redmine.openinfosecfoundation.org/issues/3394
Source Url

Alert History

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Date Informations
2024-11-28 13:29:30
  • Multiple Updates
2024-10-28 21:28:28
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2024-10-23 09:28:03
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2024-10-23 00:28:04
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2024-10-22 21:28:28
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2023-08-12 13:03:46
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2023-08-12 01:17:02
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2023-08-11 12:57:29
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2023-08-11 01:17:32
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2023-08-06 12:55:48
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2023-08-06 01:16:56
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2023-08-04 12:56:06
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2023-08-04 01:17:07
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2023-07-14 12:56:05
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2023-07-14 01:17:03
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2023-03-29 01:57:23
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2023-03-28 12:17:21
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2021-08-05 01:33:13
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2021-07-21 17:24:37
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2021-05-04 13:32:09
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2021-04-22 02:46:31
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2020-11-01 17:22:46
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2020-05-23 02:27:14
  • First insertion