CVE-2021-45098
Suricata HTTP Signature Bypass via RST TCP Packet Injection Vulnerability
Description
An issue was discovered in Suricata before 6.0.4. It is possible to bypass/evade any HTTP-based signature by faking an RST TCP packet with random TCP options of the md5header from the client side. After the three-way handshake, it's possible to inject an RST ACK with a random TCP md5header option. Then, the client can send an HTTP GET request with a forbidden URL. The server will ignore the RST ACK and send the response HTTP packet for the client's request. These packets will not trigger a Suricata reject action.
INFO
Published Date :
Dec. 16, 2021, 5:15 a.m.
Last Modified :
Jan. 4, 2022, 4:48 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-45098.
| URL | Resource |
|---|---|
| https://forum.suricata.io/t/suricata-6-0-4-and-5-0-8-released/1942 | Release Notes Vendor Advisory |
| https://github.com/OISF/suricata/commit/50e2b973eeec7172991bf8f544ab06fb782b97df | Patch Third Party Advisory |
| https://github.com/OISF/suricata/releases | Release Notes Third Party Advisory |
| https://redmine.openinfosecfoundation.org/issues/4710 | Exploit Issue Tracking Patch Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-45098 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-45098 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Jan. 04, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Changed Reference Type https://forum.suricata.io/t/suricata-6-0-4-and-5-0-8-released/1942 No Types Assigned https://forum.suricata.io/t/suricata-6-0-4-and-5-0-8-released/1942 Release Notes, Vendor Advisory Changed Reference Type https://github.com/OISF/suricata/commit/50e2b973eeec7172991bf8f544ab06fb782b97df No Types Assigned https://github.com/OISF/suricata/commit/50e2b973eeec7172991bf8f544ab06fb782b97df Patch, Third Party Advisory Changed Reference Type https://github.com/OISF/suricata/releases No Types Assigned https://github.com/OISF/suricata/releases Release Notes, Third Party Advisory Changed Reference Type https://redmine.openinfosecfoundation.org/issues/4710 No Types Assigned https://redmine.openinfosecfoundation.org/issues/4710 Exploit, Issue Tracking, Patch, Vendor Advisory Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:* versions up to (excluding) 6.0.4 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-45098 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-45098
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.18 }} 0.02%
score
0.56070
percentile