An attempt by a threat to exploit a weakness in a system.

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Limiting database security

A number of texts signify that the most important aspects offered by a DBMS are availability, integrity, and secrecy. As part of a homework assignment I have been tasked with mentioning attacks which ...
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157 views

Is my ISP hacking me? [closed]

Today I was trying to enter my routers admin page. I put the default IP address starting with 192.168. I couldn't login so ran ipconfig, and I discovered that I was assigned a Class A address. I was ...
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637 views

Text changing virus

Can malware change words that I have typed and then saved in the computer'? If so, how likely is this?
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1k views

Extremely big HTTP chunk size

I am working in a project which we must count HTTP response size. I am getting chunk size like: crlf = g_strstr_len(chunkeddata , responceSize - responceHeaderSize, "\r\n") And than I had a ...
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259 views

Do obscure image URLs prevent image harvesting?

On a Web site which requires user login, and all content is viewable by any registered user, is there any point in making obscure image URLs like "1mh9cr2m78234bc23-32xy4723nxy12.jpg" to protect the ...
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136 views

WebServices Security [closed]

Do we have any good resources on WebServices Security? Any book, pdfs, articles and even the detail answers regarding the securing web services would be appreciated.
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62 views

CSRF Implementation

I am working on website,where I want include csrf checks by using referrer checks,will this be sufficient way to protect the form from csrf attack? if not what an attacker can do to bypass it?
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216 views

When MBR pirates grin as an indication of absolute pleasure!

Someone, have no idea who, really worked my computer, and placed some rootkit, all-knowing, all-smashing malware something and I simply cannot keep Windows OS clean in a multiboot configuration with ...
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607 views

What is this for a Request?

i see the following request-string (see complete example below) with the same request_parameters, but differing values, hitting all our sites/wafs. the scheme is always the same: ...
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3k views

Snort false positive?

I've set up snort and am configuring it for my network. I have one vpn server making a connection to my dns/AD server. This connection sets off: GPL SHELLCODE x86 inc ebx NOOP The payload is as ...
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149 views

I am still logged in using a browser X, can CSRF attack work when I use another (default) browser Y on the same machine?

I am still logged in using a browser X, can CSRF attack work when I use another (default) browser Y on the same machine? Edit Assume the web server has CSRF vulnerability. No hidden token checking ...
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137 views

Does “Magic Numbers” weaken encryption?

I was wandering at superuser and I found this question: Compress and then encrypt, or vice-versa? Nearly all files have a Magic Number at a certain position in them. So, I wonder if I can attack (to ...
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88 views

Reasonable source of old proof-of-concept attacks

I am relatively new to the area of cyber security but have a reasonable knowledge of several programming languages, assembly (x86 in particular) and scripting. In light of the recent Shellshock and ...
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1k views

What is a salami attack?

Can someone give a clear definition of a Salami Attack? In the book Security in Computing (4th Edition) by Charles P. Pfleeger. It is stated as a attack to data integrity and I quote the passage: ...
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78 views

Is a server absolutely safe if the attacker don't know unknown bug?

If a server installed all patches for known bugs and the attacker can't do a 0-day attack, then is the server absolutely safe?
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99 views

bscrypt,scrypt v/s iterative SHA-x [duplicate]

Both bcrypt and scrypt hashing algorithms are designed to increase the resources required during the computation. Hashing passwords with these algorithms can be beneficial as it makes the task of an ...
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86 views

Force DNS to attach bad IP address

The question is not professional, but what I'm trying to say is... Is there any way to inject or force the DNS server to attach/change an IP address for some site. For example, I'm running an apache ...
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103 views

If TLS compression is not supported is a site still vulnerable to attacks such as BREACH?

I have read that BREACH was a side channel compression attack against TLS however focuses on HTTP response compression. If a site has disabled support for TLS compression does that still mean it can ...
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90 views

Is there any way to log in with a hash?

I've understood that the following steps are taken when I log in to a site: 1. My password is hashed 2. The hash is compared to what's stored in the database. 3. If the hashes are equal, I can log in. ...
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64 views

Is it possible to implement a secure game without having a reliable arbiter?

N players are playing a perfect information game (the kind of game where everyone knows moves of everyone) by making moves by turn (P1, P2, ..., Pn, P1, ..., Pn, ... till the game will finish). Game ...
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874 views

Secure against HTTP FLOOD ATTACK

What is the best way to defend your web site against HTTP FLOOD POST/GET ATTACK ?
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899 views

How is iptables useful to prevent attacks against a LAN?

I need some advice securing a LAN using iptables. I've found lots of examples on how to secure single host with iptables, including scanning ports, attacking using ICMP-flood and TCP-flood. These ...
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57 views

Why do heap overflows/int overflows/stack overflows/buffer overflows only happen in higher addresses?

I read somewhere that these type of attacks are susceptible to addresses that are higher and not lower in the stack/heap/buffer. Why is this?
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105 views

Can TLS fallback work with server side support only?

I have patched my server with OpenSSL 1.0.1j for the Poodle vulnerability. Been reading the spec on TLS_FALLBACK_SCSV. From what I can tell in order for TLS fallback prevention to work properly it ...
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169 views

Clarification about the post: Russian hackers use ‘zero-day’ to hack NATO, Ukraine in cyber-spy campaign

I have encountered the following article on Washington post: Russian hackers use ‘zero-day’ to hack NATO, Ukraine in cyber-spy campaign. As always in such kind of articles the publication sounds ...
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629 views

Devious Blind SQL Injection Payload

I came along this blind SQL injection time based payload and I need to understand how it works ...
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105 views

How much harm can an attacker do on the Diffie-Hellman exchange?

I'm looking at a system that uses an unprotected Diffie-Hellman exchange to negotiate a key for the session encryption. That Diffie-Hellman is not secure against man-in-the-middle attacks is textbook ...
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292 views

How does the 'QuantumInsert' attack work?

I recently stumbled on descriptions of the 'QuantumInsert' attack (mainly used by the TAO group from NSA). This technique seems to be massively used to perform man-in-the-middle or man-on-the-side ...
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How to deal with a hacked laptop that's being remotely monitored

One of friends hacked my laptop and now whenever I come online he can tell what tabs are opened in my browser, so I think he is remotely monitoring me. I don't know how he did this, since I didn't ...
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244 views

Possible DOS Attack? And solutions for it?

I don't know whether it's appropriate to post this question here but I desperately need help. I've been receiving ping requests from 18 different IP addresses so far. Some of them are local, some ...
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103 views

What is the heapspray technique and how to use it as reliably as possible?

Can somebody explain the different steps to produce a heapspray attack (what are the needed vulnerabilities in the targeted software, what are the limitations of such technique, how to proceed, ...) ...
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123 views

How to know what's the type of an attack and from whom is sent?

I'm currently running a game server on a dedicated Windows 7 machine and it is being attacked. How do I know what kind of attack it is and from whom is sent? When he attacks, the RDP freezes and the ...
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1k views

HTTPS and cache injection

I understand the downside of this attack and what wrong can be done. But I dont understand how is it done ? Well, I need to educate myself, any pointers would be useful.
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syn flood size per second

Given the size of a TCP packet is 60 bytes, there is a SYN Flood attack on a computer made ​​by a 100 Mb bandwidth, the question is how many syn packets are sent in a second? Is there any formula for ...
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If the encryption algorithm broken or analysed, can an attacker find my password?

If the encryption algorithm broken or analysed, can the attacker know what my password was?
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113 views

Break in attempts from secureserver.net

Over the last few weeks I have seen dozens if not hundreds of break-in attempts from ip addresses which map back to secureserver.net. I know these are GoDaddy machines from the who is look up. ...
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91 views

Is Great Cannon essentially a JavaScript injection attack?

I was reading an article on Great Cannon at Ars Technica (http://arstechnica.com/security/2015/04/meet-great-cannon-the-man-in-the-middle-weapon-china-used-on-github/) and it seems to me that this is ...
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123 views

Detecting web app attacks by parsing log files [duplicate]

Following up on this question as the answers are now 5 years old: Can I detect web app attacks by viewing my Apache log file? My boss has tasked me with analyzing our access.log and error.log files ...
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78 views

How can the sybil attack be used on a P2P system that implements DHT?

I was reading about the sybil attack and am unclear on some details. After becoming part of the peer-to-peer network, the adversary may then overhear communications or act maliciously. By ...
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427 views

Attacking a server on port 80 while only port 22 is open on the firewall

There is a question bugging me a after reading on network security. Theoretical situation: there is a packet-filtering firewall, which only accepts tcp/ip communication with destination port 22 on a ...
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155 views

I need help figuring out the meaning of a potential hijacking script

I am using Ubuntu 13.04. Something really strange happened. I was writing my homework for a Ruby course. I had Sublime Text 2 (a text editor like Notepad, Notepad++, Textmate etc.) opened and was ...
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763 views

Different Security Issues Depending on OS? [closed]

I'm interested in learning more about OS specific security issues if there are any. I'm very new to this topic but I want to learn more about if there are specific security vulnerabilities associated ...
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390 views

Determining the target address in a heap overflow

For a heap overflow to occur and arbitrary code to be executed, the function free() performs the step : hdr->next->next->prev = hdr->next->prev I understand that the address of ...
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678 views

How to fix the audit failure in our web server

We noticed that we are getting the following audit failure logs in our web server. The workstation is not in our network. Can anybody help me how to isolate and prevent this from happening? An ...
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954 views

Wireless LAN router fingerprinting

Does anyone know of a database that lists the range of MAC addresses that are assigned to each particular brand of router? I would like to use this information for fingerprinting. I know I can find ...
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6k views

How to conduct DDoS attack practically? [duplicate]

Possible Duplicate: How to simulate DDoS attacks from the Internet? I want to conduct a DDoS attack. Can anyone please tell how can i conduct it? What are the latest DDos attacks? What are ...
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613 views

types of intrusions on host [closed]

I am implementing an IDS and just want to know that what are the possibilities with which the intrusion can occur.I am just doing a literature survey over the atacks possible so I want to know that ...
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550 views

Sun ILOM / Out of band management security concerns

I would like to get some outside opinion on this if possible, although I do not know what to ask. Sun ILOM is an Out-of-band management system. I understand it is a separate OS on the box that is ...
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46 views

Potential worm damage on a physically isolated Tor system

I'm setting up a physically isolated Tor system (with one computer serving as the workstation and another as a Tor gateway), and I'm concerned about methods a worm could use to infect my OS. In the ...
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What are the traces of a mysql attack on a server when the attacker has full permissions?

I just turned my server off yesterday, after it began to distribute comment spam across the internet, at an astounding rate over 70 "spams"/min, bottom of the line 1/2 gig ram VPS. I'm still trying to ...