CVE-2019-18792
CVSS V2 Medium 6.4
CVSS V3 Critical 9.1
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.
Overview
- CVE ID
- CVE-2019-18792
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2020-01-06T18:15:23
- Last Modified Date
- 2021-07-21T11:39:23
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:suricata-ids:suricata:*:*:*:*:*:*:*:* | 1 | OR | 4.1.5 | 4.1.6 |
| cpe:2.3:a:suricata-ids:suricata:5.0.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:N/I:P/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 6.4
- Severity
- MEDIUM
- Exploitability Score
- 10
- Impact Score
- 4.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 9.1
- Base Severity
- CRITICAL
- Exploitability Score
- 3.9
- Impact Score
- 5.2
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/OISF/suricata/commit/1c63d3905852f746ccde7e2585600b2199cefb4b | Patch Third Party Advisory |
| https://redmine.openinfosecfoundation.org/issues/3324 | Exploit Third Party Advisory |
| https://redmine.openinfosecfoundation.org/issues/3394 | Exploit Third Party Advisory |
| https://github.com/OISF/suricata/commit/fa692df37a796c3330c81988d15ef1a219afc006 | Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2020/01/msg00032.html | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2019-18792 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18792 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 16:09:48 | Added to TrackCVE | |||
| 2022-12-04 09:01:15 | 2020-01-06T18:15Z | 2020-01-06T18:15:23 | CVE Published Date | updated |
| 2022-12-04 09:01:15 | 2021-07-21T11:39:23 | CVE Modified Date | updated | |
| 2022-12-04 09:01:15 | Analyzed | Vulnerability Status | updated |