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What Exploit Are These User Agents Trying to Use?


What is SPL exploit?What kind of security injection are these traces of, SQL, javascript, or otherwise?Is it illegal to use Fake User-agents?Server attack attempts, what are they trying to achieve?Can I exploit Windows kernel from user-mode application?HTTP attack taking down PHP-FPMSegmentation fault trying to exploit printf vulnerabilityWhat web servers are affected by this user agent exploit?Which exploit and which payload use?Help on what to do with these suspicious logs













2















I just looked at my user agent tracking page on my site (archived on Yandex) and I noticed these user agents. I believe they are an attempt to exploit my server (NGinx with PHP). The 1 in front of it is just how many times the user agent was seen in the NGinx log. These are also shortened user agents and not long ones like Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36. I no longer have access to the logs as I presume this occurred sometime in January or February (my oldest logs are in March and I created the site in January).



1 Mozilla/5.9}print(238947899389478923-34567343546345);
1 Mozilla/5.9$print(238947899389478923-34567343546345)
1 Mozilla/5.9x22$print(238947899389478923-34567343546345)x22
1 Mozilla/5.9x22];print(238947899389478923-34567343546345);//
1 Mozilla/5.9x22


What exploit was attempted and how can I test to ensure these exploits are not usable?










shareprint(238947899389478923-34567343546345); 









2












2








2








I just looked at my user agent tracking page on my site (archived on Yandex) and I noticed these user agents. I believe they are an attempt to exploit my server (NGinx with PHP). The 1 in front of it is just how many times the user agent was seen in the NGinx log. These are also shortened user agents and not long ones like Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36. I no longer have access to the logs as I presume this occurred sometime in January or February (my oldest logs are in March and I created the site in January).



1 Mozilla/5.9print(238947899389478923-34567343546345);improve this question














I just looked at my user agent tracking page on my site (archived on Yandex) and I noticed these user agents. I believe they are an attempt to exploit my server (NGinx with PHP). The 1 in front of it is just how many times the user agent was seen in the NGinx log. These are also shortened user agents and not long ones like Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36. I no longer have access to the logs as I presume this occurred sometime in January or February (my oldest logs are in March and I created the site in January).



1 Mozilla/5.9print(238947899389478923-34567343546345);{
1 Mozilla/5.9$print(238947899389478923-34567343546345)
1 Mozilla/5.9x22$print(238947899389478923-34567343546345)x22
1 Mozilla/5.9x22];print(238947899389478923-34567343546345);//
1 Mozilla/5.9x22


What exploit was attempted and how can I test to ensure these exploits are not usable?







exploit webserver web nginx anti-exploitation






share|improve this question













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asked 3 hours ago









SenorContentoSenorContento

256




256




















      2 Answers
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      3














      It looks to be trying to exploit some form of command injection. As DarkMatter mentioned in his answer, this was likely a broad attempt to find any vulnerable servers, rather than targeting you specifically. The payload itself just appears to just be testing to see if the server is vulnerable to command injection. It does not appear to have any additional purpose.



      In order to test if you would be affected by these specific payloads, the easiest way would be to send them to your own server, and see how they respond. Note, that I only say this because the payloads themselves are benign; I do not recommend doing this with all payloads.



      My bet is that your server is not vulnerable, because I would have expected to see follow up request to actually exploit your server.






      share|improve this answer






























        3














        It is probably nothing. It seems like the broad spam of a scanner looking across the web for any website that evaluates and returns that subtraction when it shouldn't. It is a pretty common thing to see.






        share|improve this answer























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          2 Answers
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          2 Answers
          2






          active

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          active

          oldest

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          active

          oldest

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          3














          It looks to be trying to exploit some form of command injection. As DarkMatter mentioned in his answer, this was likely a broad attempt to find any vulnerable servers, rather than targeting you specifically. The payload itself just appears to just be testing to see if the server is vulnerable to command injection. It does not appear to have any additional purpose.



          In order to test if you would be affected by these specific payloads, the easiest way would be to send them to your own server, and see how they respond. Note, that I only say this because the payloads themselves are benign; I do not recommend doing this with all payloads.



          My bet is that your server is not vulnerable, because I would have expected to see follow up request to actually exploit your server.






          share|improve this answer



























            3














            It looks to be trying to exploit some form of command injection. As DarkMatter mentioned in his answer, this was likely a broad attempt to find any vulnerable servers, rather than targeting you specifically. The payload itself just appears to just be testing to see if the server is vulnerable to command injection. It does not appear to have any additional purpose.



            In order to test if you would be affected by these specific payloads, the easiest way would be to send them to your own server, and see how they respond. Note, that I only say this because the payloads themselves are benign; I do not recommend doing this with all payloads.



            My bet is that your server is not vulnerable, because I would have expected to see follow up request to actually exploit your server.






            share|improve this answer

























              3












              3








              3







              It looks to be trying to exploit some form of command injection. As DarkMatter mentioned in his answer, this was likely a broad attempt to find any vulnerable servers, rather than targeting you specifically. The payload itself just appears to just be testing to see if the server is vulnerable to command injection. It does not appear to have any additional purpose.



              In order to test if you would be affected by these specific payloads, the easiest way would be to send them to your own server, and see how they respond. Note, that I only say this because the payloads themselves are benign; I do not recommend doing this with all payloads.



              My bet is that your server is not vulnerable, because I would have expected to see follow up request to actually exploit your server.






              share|improve this answer













              It looks to be trying to exploit some form of command injection. As DarkMatter mentioned in his answer, this was likely a broad attempt to find any vulnerable servers, rather than targeting you specifically. The payload itself just appears to just be testing to see if the server is vulnerable to command injection. It does not appear to have any additional purpose.



              In order to test if you would be affected by these specific payloads, the easiest way would be to send them to your own server, and see how they respond. Note, that I only say this because the payloads themselves are benign; I do not recommend doing this with all payloads.



              My bet is that your server is not vulnerable, because I would have expected to see follow up request to actually exploit your server.







              share|improve this answer












              share|improve this answer



              share|improve this answer










              answered 2 hours ago









              user52472user52472

              2,422614




              2,422614























                  3














                  It is probably nothing. It seems like the broad spam of a scanner looking across the web for any website that evaluates and returns that subtraction when it shouldn't. It is a pretty common thing to see.






                  share|improve this answer



























                    3














                    It is probably nothing. It seems like the broad spam of a scanner looking across the web for any website that evaluates and returns that subtraction when it shouldn't. It is a pretty common thing to see.






                    share|improve this answer

























                      3












                      3








                      3







                      It is probably nothing. It seems like the broad spam of a scanner looking across the web for any website that evaluates and returns that subtraction when it shouldn't. It is a pretty common thing to see.






                      share|improve this answer













                      It is probably nothing. It seems like the broad spam of a scanner looking across the web for any website that evaluates and returns that subtraction when it shouldn't. It is a pretty common thing to see.







                      share|improve this answer












                      share|improve this answer



                      share|improve this answer










                      answered 3 hours ago









                      DarkMatterDarkMatter

                      2,1081120




                      2,1081120



























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