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Can Hacker Get My Code through Ad-Hoc Files?


Can Hacker Get My Code through Ad-Hoc Files?

By : user3851217
Date : October 17 2020, 11:12 PM
this will help In theory, they could de-compile your code.
But the reality is that de-compiled code is not very useful, and I'm not even sure there are any decompilers at the moment.
code :


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Is this code vulnerable to hacker attack?

Is this code vulnerable to hacker attack?


By : TRD07
Date : March 29 2020, 07:55 AM
will be helpful for those in need Apart from that typo on line 2 (should be $return = $_GET['return'];) you should do $return = urlencode($return) to make sure that $return is a valid QueryString as it's passed as parameter to index.php.
index.php should then verify that return is a valid URL that the user has access to. I do not know how your index.php works, but if it simply displays a page then you could end up with someting like index.php?/etc/passwd or similar, which could indeed be a security problem.
Facebook Hacker Cup Subround 1B - Slot Machine Hacker

Facebook Hacker Cup Subround 1B - Slot Machine Hacker


By : user2670486
Date : March 29 2020, 07:55 AM
it helps some times Source: Facebook Hacker Cup. , Got it!
Here is my solution in Python:
code :
a = 5402147
b = 54321
n = 10000001

def psi(x):
    return (a * x + b) % n

inverse1000 = 9990001
max_k = (n-1) / 1000 + 1

def first_input(y):
    global last_input, i, possible_k
    last_input = y
    possible_k = [set(range(max_k))]
    i = 0

def add_input(y):
    global last_input, i
    c = inverse1000 * (b + a * last_input - y) % n
    sk0 = set()
    sk1 = set()
    for k0 in possible_k[i]:
        ak0 = a * k0 % n
        for k1 in range(max_k):
            if (k1 - ak0) % n == c:
                sk0.add(k0)
                sk1.add(k1)
                #print "found a solution"
    last_input = y
    possible_k[i] = possible_k[i] & sk0
    possible_k.append(sk1)
    i += 1
    if len(possible_k[i-1]) == 0 or len(possible_k[i]) == 0:
        print "Wrong machine"
        return
    if len(possible_k[i]) == 1:
        x = y + 1000 * possible_k[i].copy().pop()
        for j in range(10):
            x = psi(x)
            print x % 1000,
        print
        return
    print "Not enough observations"
>>> first_input(767)
>>> add_input(308)
Not enough observations
>>> add_input(284)
577 428 402 291 252 544 735 545 771 34

>>> first_input(78)
>>> add_input(880)
Not enough observations
>>> add_input(53)
698 235 762 18 98 703 456 676 621 291
>>> add_input(698)
235 762 18 98 703 456 676 621 291 488
>>> add_input(235)
762 18 98 703 456 676 621 291 488 332

>>> first_input(862)
>>> add_input(452)
Not enough observations
>>> add_input(303)
Wrong machine
>>> add_input(558)
Wrong machine
Hacker uploaded files to FTP - what kind of hack is this?

Hacker uploaded files to FTP - what kind of hack is this?


By : Mohammad
Date : March 29 2020, 07:55 AM
To fix this issue It is very possible for a hacker to upload files through a PHP site. I've seen it many times.
PHP has the potential to be very insecure. Getting in through PHP isn't very hard if your configuration is weak. Check your access logs and look for anything that seems wrong, particularly a whole bunch of requests from a single IP address. If they are in that deep, your access log may itself be compromised, and beyond even that.
Under what scenario will a hacker get the table but not the PHP code?

Under what scenario will a hacker get the table but not the PHP code?


By : user3702508
Date : March 29 2020, 07:55 AM
seems to work fine It should be noted that SQL Injection can be used to read files using load data infile. By having a salt value unknown to the attacker, this will force the attacker into making a lot more guesses in order to obtain the plain text. Although salting almost never takes this into consideration. The main idea is two accomplish two things:
1) Two users with the same password will have different password hashes. This is why some salting systems using very small salts, such as only a few bytes.
Can hacker delete my server files and database where I am using below function?

Can hacker delete my server files and database where I am using below function?


By : DisplayName=
Date : March 29 2020, 07:55 AM
this one helps. With all of does done i don't think a hacker can delete or access your database.
But there are also many other techniques a hacker can use in hacking your website.
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