1
vote
1answer
701 views

Security implications of adding all domains to CORS (i.e. Access-Control-Allow-Origin: *) [duplicate]

I am curious of what all the security implications are if I set the following two HTTP response CORS headers; Access-Control-Allow-Origin: * Access-Control-Allow-Credentials: false The only ...
0
votes
2answers
955 views

Client Authentication by certificates in Google APP Engine java

I am writing an application in Google APP Engine java which authenticate the user by its certificate. I have created a self signed certificate using keytool at client side. I also enable the HTTPS ...
0
votes
0answers
72 views

Does the ordering of encryption and hashing matter? [duplicate]

I am now learning keyed hash function, where A and B share a secret key k. I want to know if the ordering of encryption E and hashing H matters? i.e. Is there any difference between H ◦ Ek (m) and Ek ...
0
votes
1answer
135 views

Should all Server Certificates from one CA have the same CRL

I am setting up my own PKI, and I came across a question to which I couldn't find an answer. I want to specify CRLDistributionPoints in my server certificates but I am curious whether to use the same ...
0
votes
1answer
1k views

Using timeouts to automatically detect blind sql injection exploits

I'm working on a penetration testing tool, and I have error-based sql injection pretty much covered, but I was wondering, is it possible to use timeouts, along with built in sql commands to detect an ...
1
vote
3answers
249 views

Would SSH MitM attacks utilize spoof IPs?

I am presented with SSH log from a SSH server and the said SSH server only accepts connection from 2 known public IPs over WAN. The content of the log shows that a user was successfully ...
4
votes
2answers
772 views

Can you securely wipe an SSD by filling the remaining space with bogus data? [duplicate]

It's been established that, thanks to our good friend Mr. Wear Leveler, wiping data from an SSD is very difficult. I understand that the one thing you don't want to do is actually attempt to shred ...
1
vote
0answers
84 views

A crash/mini dump concern [closed]

I just experienced a crash on my laptop. I was surfing the internet and all of a sudden everything crashed and a small blue screen (centred on the screen) popped up and was counting down. I didn't ...
-1
votes
2answers
785 views

How much are 0-days worth? [closed]

I got discussing this topic with someone recently and we couldn't reach a consensus so I thought I should ask here. There are commonly thrown around figures regarding the cost of buying a ...
1
vote
1answer
1k views

Starting a new shell in a strcpy exploit using buffer overflow

I'm learning about buffer overflows and have this vulnerable code which I'm trying to start a shell from: #include <string.h> void myfunction(char *arg); int main(int argc, char **argv) { ...
-1
votes
1answer
259 views

How to interpret these (en|de)cryption instructions? [closed]

I found this string on a forum HVrUyitih"fZnvWxbsQXrk6a61oxEWU0TvcagVKz1RvRTBbqpmuJ6zNWp5a5 ZO_ggA1ov6exdUTNREr"A5NthZt97Im60kBHn0sXUhwfN33ce5VvRfUItQyg ...
2
votes
1answer
232 views

Submit form with token

I have a token that I want to use to prevent direct access of some php-files. Some of these php-files are loaded via AJAX. The token is used with a session to secure form submission AND to prevent ...
0
votes
1answer
237 views

company is sending md5 string via GET['password'] dangerous?

So, this big, reknown company (you all heard off) is sending md5 encrypted strings (with GET key: password) over HTTP. I accidentally came over it since I wanted to use jnlp on a non-windows ...
5
votes
1answer
453 views

Suspicious activity on contact form, what are their intentions?

I've just started receiving several emails per second and I think it's likely someone is trying to exploit my contact form. I've taken steps to protect my site, I'm just curious what it is they're ...
1
vote
1answer
176 views

Why is ICMP timestamping disabled on OS X?

It would seem like ICMP timestamping is quite a useful feature for troubleshooting networks with asymmetric paths. Replies to icmp(4) timestamp requests are generated by the kernel: On OpenBSD, the ...
0
votes
2answers
241 views

Lost user password in Slackware 14.1, how to resolve encryption in /etc/shadow?

Usually I use my root account when working with my Linux server, however, I created a user account which I use far less frequently. However, I would like to use it for a task today, but I forgot the ...
0
votes
2answers
72 views

Restricting locations for unzipping a zip file

I hope that I have found the correct place to ask my question regarding unzipping files. I would like to see if there is a way to restrict the locations available to the user to unzip a password ...
2
votes
1answer
2k views

Resources for determining if Metasploit has exploit for given CVE

Are there any reliable resources for finding whether or not a Metasploit exploit exists for a given CVE? I have found CVE Details to be woefully out of date with regards to keeping this information ...
-1
votes
1answer
133 views

Password sending through network [duplicate]

In case of no TLS/SSL available, why can't I use the hash of the password (SHA512) as the key to encrypt the password (with out any salt) to send through the network ? MITM attacks I can understand, ...
2
votes
1answer
285 views

Who other than my ISP can perform man-in-the-middle attacks?

I've heard that not using https is dangerous because of man-in-the-middle attacks. Now, if I connect to a server from my home computer, I assume traffic passes through my ISP, so they could eavesdrop ...
5
votes
2answers
244 views

How to destroy VOIP phone in a proper way?

Are there any standards which consider safe destroying of VOIP phones? I would like to prevent eventual data leakage after devices which have left the company.
0
votes
1answer
250 views

can one stop spam with my name but not my address [closed]

IS there a way to stop getting spam that is from my name but not my e mail address I am receiving many spam letters using my name but different e mail addresses.
3
votes
4answers
619 views

Irreversible hashing without collision

We are looking to allow users to log on with a smart card. The smart card reader can read the smart card ID and send it to us. We are, however, not allowed to store the smart card ID. Not in ...
1
vote
1answer
2k views

iOS: sandbox of an iphone app

I am new to iOS so I do have only limited knowledge about iOS in general. For self learning purposes, I would like to know several things as I am quite confused after searching the web. I do know ...
2
votes
3answers
109 views

Are there any reasons to be concerned about the security of “Coin”? [duplicate]

I just came across this: https://onlycoin.com/ A credit-card sized device that not only holds the info for as many credit and debit and membership cards as you want (they claim) but also can ...
1
vote
1answer
401 views

How should developers handle Form POST variables that conflict with route variables?

In ASP.NET MVC, when I perform a HTTP post to /controller/action/UserID ... and have a corresponding route /controller/action/{UserID} ... and if I do a Form POST, the POSTed data UserID ...
1
vote
5answers
467 views

VPN Authentication over WiFi — Is it secure?

Count this question as part of my ignorance on how authentication scheme is done on your typical VPN session. But here goes: We often advise the security-conscious user that if one must use an ...
-1
votes
2answers
292 views

Is CISSP suitable for a Java architect? [closed]

I am a tech lead developing web (Java/JEE) and mobile applications (Android) for the past 12 years (mobile in last year though). I am somehow interested in IT security. Is it worth taking CISSP or ...
5
votes
3answers
839 views

What is a pen tester?

I asked two pen testers what exactly it is that they do. One of them has told me that all he ever does is try to find exploits in the software in order to gain access to internal servers and nothing ...
1
vote
2answers
2k views

How to do server side validations in Java to prevent XSS? [closed]

When i use method Get and intercept the request with any proxy tool. then Cross site scripting because of absence of server side validations. But in case of post method, as we know data flows in the ...
1
vote
1answer
7k views

Speaking Plain HTTP over an SSL enabled Server port [closed]

atm I'm facing a problem with IE and Firefox because they don't redirect my Links correctly. I'm requesting my application via: https://myapp.example.de/context In my webapplication I have links ...
1
vote
3answers
313 views

How do I know if I have a keylogger from my Flash client on Windows 7?

I'm at work and having some issues here, so I found a lot of suspicious files involving the Flash, so I though that could be a keylogger. How do I find out if it is, and if truly is, what do I do to ...
0
votes
1answer
200 views

how can I secure my static ip router?

hi I have a static ip and someone is hacking my computer trought it I tried to format my computer and making a clean install but he keeps penetrating it this time i tried to install the AV before ...
0
votes
1answer
1k views

Hydra gives wrong answers

Problem: Hydra keeps giving me incorrect passwords every time. I'm using brute-force via Hydra to guess the correct password on a certain website. First of all I used BurpSuite to intercept the page ...
5
votes
4answers
599 views

How to keep Mac secure from viruses, malware and keyloggers?

How can I download and install software and make sure that it is not infected with viruses, malware or a keylogger? Also, I heard that Macs "don't get viruses". Is this true? Is it a good practice to ...
2
votes
1answer
241 views

Pentesting Cleanup

I've recently discovered a backdoor shell that was created via file injection on a public facing website. After much digging, I found the creation date of this file to be around the same time ...
2
votes
2answers
301 views

How common is Perfect Forward Secrecy in HTTPS clients?

We are hosting an SaaS website and API with the https protocol, both of which are accessed by numerous users with a lot of different browsers and client-side apps. What would happen if I made PFS ...
3
votes
2answers
476 views

Why don’t SMTP servers just require all senders to be authenticated before accepting mail?

Why don’t SMTP servers just require all senders to be authenticated before accepting mail?
1
vote
1answer
142 views

Security risks if a server in not supported anymore

I have an SQL 2000 database server which is not supported by Microsoft anymore. We have our information security policy applied and even PCI requirements. What are the security risks that we might ...
1
vote
1answer
4k views

SSLv3 or SSL Certificate Version 2?

Below is the SSLScan output, what does it mean with SSL Cerficate Version 2? Aren't SSLv3 and SSL Certificate Version 2 the same? ...
1
vote
2answers
738 views

Windows certificate store suddenly changed security level of one of my certificates

I use Windows 8.1 Pro 64 bit and IE11. I have two personal certificates (with private key) of mine in the system certificate store. They are both set to require a password before they can be used. ...
2
votes
1answer
218 views

Evil maids in the server room [closed]

I am well aware of the fact that physical insecurity in principle means no security. But let´s say I own a root server with full disk encryption which is unlocked/booted via dropbear ssh. In which ...
0
votes
1answer
226 views

How does ssl prevent MITM attacks [duplicate]

My understanding of how it works : A victim asks for the public key of a server. The attacker just forwards this request. The server now responds with a certificate which contains the Public key. The ...
3
votes
2answers
375 views

How secure is the private storage of a mobile app

Are there any know security flaws/hacks to gain access to the private storage(file system or SQLite database) of Android and iOS applications? What measures do Google and Apple take to "prevent" ...
1
vote
2answers
107 views

How to sign and encrypt mails using firefox

There is an option under Tools>options>Advanced>Security Devices. How to use that to encrypt and digitally signed your emails.
2
votes
1answer
153 views

I don't quite understand the principle of “use after free” and CVE-2010-1119

I am a rookie hacker studying android vulnerabilities. My partner and I are studying "CVE-2010-1119". Unfortunately there does not appear to be enough information online. Could anyone please help me ...
26
votes
5answers
15k views

“Diffie-Hellman Key Exchange” in plain English

Can someone explain to me what is Diffie-Hellman Key Exchange in plain English? I have read in a non-tech news page that twitter has just implemented this technology which allows two persons to ...
0
votes
2answers
686 views

Does Thunderbird send IP address?

I send my gmail emails from thunderbird (on Ubuntu machine). I am wondering whether thunderbird sends out the IP? If so, how can I hide my IP from the outgoing emails?
3
votes
2answers
2k views

What does it mean to have a “file name with NULL bytes in serialized instances”?

I was browsing this page, which redirected me to this vulnerability because I'm a Java developer and I'm aware of the affected library. Basically the vulnerability says: It was discovered that ...
1
vote
1answer
437 views

Trying to verify my X509 certificate “could not verify this certificate for unknown reasons”

I have created my own X509 certificate with my own CA. I am able to import the CA certificate into Firefox, but when I try to import the user's certificates i get the following: "Could not verify ...

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