CVE-2021-42756
FortiWeb Proxy Daemon Stack-Based Buffer Overflow Vulnerability
Description
Multiple stack-based buffer overflow vulnerabilities [CWE-121] in the proxy daemon of FortiWeb 5.x all versions, 6.0.7 and below, 6.1.2 and below, 6.2.6 and below, 6.3.16 and below, 6.4 all versions may allow an unauthenticated remote attacker to achieve arbitrary code execution via specifically crafted HTTP requests.
INFO
Published Date :
Feb. 16, 2023, 7:15 p.m.
Last Modified :
Nov. 7, 2023, 3:39 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2021-42756 has a 2 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2021-42756.
| URL | Resource |
|---|---|
| https://fortiguard.com/psirt/FG-IR-21-186 | 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).
None
Python
一个CVE漏洞预警知识库 no exp/poc
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-42756 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-42756 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.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Changed Description Multiple stack-based buffer overflow vulnerabilities [CWE-121] in the proxy daemon of FortiWeb 5.x all versions, 6.0.7 and below, 6.1.2 and below, 6.2.6 and below, 6.3.16 and below, 6.4 all versions may allow an unauthenticated remote attacker to achieve arbitrary code execution via specifically crafted HTTP requests. Multiple stack-based buffer overflow vulnerabilities [CWE-121] in the proxy daemon of FortiWeb 5.x all versions, 6.0.7 and below, 6.1.2 and below, 6.2.6 and below, 6.3.16 and below, 6.4 all versions may allow an unauthenticated remote attacker to achieve arbitrary code execution via specifically crafted HTTP requests. Added CWE Fortinet, Inc. CWE-121 -
Initial Analysis by [email protected]
Feb. 24, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://fortiguard.com/psirt/FG-IR-21-186 No Types Assigned https://fortiguard.com/psirt/FG-IR-21-186 Vendor Advisory Added CWE NIST CWE-787 Added CPE Configuration OR *cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:* versions from (including) 5.6.0 up to (excluding) 6.0.8 *cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:* versions from (including) 6.1.0 up to (excluding) 6.1.3 *cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:* versions from (including) 6.2.0 up to (excluding) 6.2.7 *cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:* versions from (including) 6.3.0 up to (excluding) 6.3.17 *cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:* versions from (including) 6.4.0 up to (including) 6.4.2
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-42756 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-2021-42756
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.18 }} 0.01%
score
0.55105
percentile