9.8
CRITICAL
CVE-2020-36109
ASUS RT-AX86U Router HTTPD Buffer Overflow
Description

ASUS RT-AX86U router firmware below version under 9.0.0.4_386 has a buffer overflow in the blocking_request.cgi function of the httpd module that can cause code execution when an attacker constructs malicious data.

INFO

Published Date :

Feb. 1, 2021, 2:15 p.m.

Last Modified :

Feb. 5, 2021, 9:29 p.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2020-36109 has a 4 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2020-36109 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Asus rt-ax86u_firmware
: Total Affected Vendor : 1 | Products : 1
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-2020-36109.

URL Resource
https://www.asus.com/Static_WebPage/ASUS-Product-Security-Advisory/ 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).

Profile Photo
tin-z/tin-z

None

Updated: 3 months, 4 weeks ago
2 stars 0 fork 0 watcher
Born at : March 16, 2023, 3:08 p.m. This repo has been linked 5 different CVEs too.
Profile Photo
sunn1day/CVE-2020-36109-POC

CVE-2020-36109 PoC causing DoS

Python

Updated: 2 months, 3 weeks ago
14 stars 4 fork 4 watcher
Born at : April 20, 2022, 8:07 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
developer3000S/PoC-in-GitHub

None

Updated: 8 months ago
33 stars 3 fork 3 watcher
Born at : March 12, 2021, 12:22 p.m. This repo has been linked 1063 different CVEs too.
Profile Photo
tin-z/CVE-2020-36109-POC

PoC DoS CVE-2020-36109

Updated: 1 year, 9 months ago
2 stars 1 fork 1 watcher
Born at : Feb. 13, 2021, 4:03 p.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-36109 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-36109 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
  • Initial Analysis by [email protected]

    Feb. 05, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P)
    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://www.asus.com/Static_WebPage/ASUS-Product-Security-Advisory/ No Types Assigned https://www.asus.com/Static_WebPage/ASUS-Product-Security-Advisory/ Vendor Advisory
    Added CWE NIST CWE-120
    Added CPE Configuration AND OR *cpe:2.3:o:asus:rt-ax86u_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 9.0.0.4_386 OR cpe:2.3:h:asus:rt-ax86u:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-36109 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-2020-36109 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-67: String Format Overflow in syslog() String Format Overflow in syslog() CAPEC-92: Forced Integer Overflow Forced Integer Overflow CAPEC-100: Overflow Buffers Overflow Buffers
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.54 }} 0.16%

score

0.77374

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
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