Pwn:

trust code(pwn,warmup):

Can you trust your own code? 

nc 35.190.227.47 10009

Environment: Ubuntu20.04 dcfba5b03622f31b1d0673c3f5f14181012b46199abca3ba4af6c1433f03ffd9 /lib/x86_64-linux-gnu/libc-2.31.so

[trust_code_99535baf00c91a5934765bbd83d9e2a3c4b52560.tar.gz](<https://score.linectf.me/files/add6ddbd9aa1830acbb4d71a9cad213b/trust_code_99535baf00c91a5934765bbd83d9e2a3c4b52560.tar.gz?token=eyJ1c2VyX2lkIjoxMSwidGVhbV9pZCI6MywiZmlsZV9pZCI6MTl9.Yj5ZZQ.KJXce42pKgUn4w9S8zhxW2x6Vbc>)

trust_code.tar.gz

call-of-fake:

Call Call Call!? 

nc 34.146.170.115 10001

Environment: Ubuntu20.04 dcfba5b03622f31b1d0673c3f5f14181012b46199abca3ba4af6c1433f03ffd9 /lib/x86_64-linux-gnu/libc-2.31.so

[call-of-fake_1dd55f3dad5363777d35186641206c8c958e3e44.tar.gz](<https://score.linectf.me/files/9a34f5a0f5f130cabe0d901b417ac5f6/call-of-fake_1dd55f3dad5363777d35186641206c8c958e3e44.tar.gz?token=eyJ1c2VyX2lkIjoxMSwidGVhbV9pZCI6MywiZmlsZV9pZCI6MTN9.Yj5Zgg.SNPy6Ka1-x9Mruw1Mh01lcNZOk4>)

call-of-fake.tar.gz

ecrypt:

New encryption service in Kernel!

nc 34.85.38.218 10002

[ecrypt_79d3e7ff562b925ef123c555c0783e1424aee89f.tar.gz](<https://score.linectf.me/files/a62067acf4fff61d6bf1f47588a668b9/ecrypt_79d3e7ff562b925ef123c555c0783e1424aee89f.tar.gz?token=eyJ1c2VyX2lkIjoxMSwidGVhbV9pZCI6MywiZmlsZV9pZCI6MjZ9.Yj5wCA.N0FN_egeSWqDIRHbotWNtVYBq58>)

ecrypt.tar.gz

ecrypt(fixed)

New encryption service in Kernel!

nc 35.200.20.143 10006

[ecrypt_79d3e7ff562b925ef123c555c0783e1424aee89f.tar.gz](<https://score.linectf.me/files/421138ae2545d10800bf92a0ab660c1c/ecrypt_79d3e7ff562b925ef123c555c0783e1424aee89f.tar.gz?token=eyJ1c2VyX2lkIjoxMSwidGVhbV9pZCI6MywiZmlsZV9pZCI6Mjh9.Yj57ug.Xqvf-FvXE3BIAcI_T5zh8ASOfPQ>)

ecrypt_fix.tar.gz

mail:

My mailbox is empty now, send me a mail! 

nc 34.146.156.91 10004

Environment: Ubuntu20.04 dcfba5b03622f31b1d0673c3f5f14181012b46199abca3ba4af6c1433f03ffd9 /lib/x86_64-linux-gnu/libc-2.31.so

[mail_533897194699e325ef863df31dc5a89fd47b19f4.tar.gz](<https://score.linectf.me/files/ce6866e5997114f9bbc1406fb3131677/mail_533897194699e325ef863df31dc5a89fd47b19f4.tar.gz?token=eyJ1c2VyX2lkIjoxMSwidGVhbV9pZCI6MywiZmlsZV9pZCI6MTV9.Yj5Zxw.7EiraJqNgRLvztMHAxpvnnRUX6w>)