An attempt to exploit a weakness in a system, either for nefarious or research reasons. Questions with this tag should be about designing, carrying out, or defending against the attack itself, rather than about the underlying weakness.

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-3
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1answer
49 views

LFI attacks auth.log , environ , passwd [closed]

paths like /proc/self/environ , /etc/passwd and /var/log/auth.log are targeted by the attackers. how can I hide those files ( passwd ) ( environ ) ( auth.log ) to be not include in LFI attack
1
vote
3answers
216 views

Can man-in-the-middle attacks affect anyone not connected to the attackers network?

I'm trying to understand what these attacks are restricted to. I'm aware that man-in-the-middle attacks can be done if the attacker is on the same network (using something like Wire Shark), but is it ...
1
vote
2answers
46 views

Access LAN services through malicious web page

Suppose that a user on a corporate network has access to a private FTP server, or intranet site, that's only available on the Local Area Network, available at http://internal.example.com. If an ...
0
votes
1answer
46 views

Can I modify a ciphertext created in AES with OFB mode?

Suppose a service uses AES to encrypt Cookies, of the form user=username+padding,tmstmp=timestamp where tmstmp is the expiration time and +padding is a series of zeroes to make the total length be ...
7
votes
2answers
8k views

Yahoo mail hacked - how to recover, how did it happen and how to prevent?

I was yesterday informed by some friends that they received spam mails with my name as sender. The sender addresses look like firstnamelastname@spacepc.pt and firstnamelastname@revistaplot.com with ...
3
votes
1answer
192 views

What is a sequential injection attack?

From the Financial Times 26th October 2015 "TalkTalk faces mounting calls for compensation" Then, the hackers downloaded customer data using a “sequential injection”. Cyber security experts say ...
11
votes
4answers
2k views

Is it possible for a vulnerability in one application to be exploited to attack another application on the same server?

If for example I have Magento-eCommerce and WordPress installed on the same server. Both have a database each with a different database username/password and both have different login details to the ...
-2
votes
1answer
56 views

What is a transient attack?

I just faced a problem of an IP is taking forever to respond, i had been told it might be a transient attack.... I tried googling it, but cant really find more info. Can anyone kindly explain to me ...
4
votes
3answers
2k views

Create a page to experiment with SQL injection [closed]

This semester, I have taken a course on Information Security and my project for this course is to implement an SQL injection to obtain admin privileges. For this I first download Havij software (...
3
votes
1answer
129 views

What sort of attack can reset MySQL Privileges and unmount remote drives without root or shell?

ATTACK VECTOR Monthly hits via a globally DDoS attack. Resolved with Cloudflare. Attacker can now somehow unmount network drive links and reset MySQL user permissions for applications. Attack is ...
0
votes
0answers
89 views

SSH attempt blocked now ECDSA keys changed

Last night I had an external IP tried to access my server over SSH. The attempt was blocked as it failed to authorise in the number of times and time limit that I'd specified. Doing a whois on the ip ...
2
votes
1answer
27 views

Revoking AIK Key

How can I prevent attacks via compromised Attestation Identity Key (AIK) keys, such as having an attacker forging the cryptographic signature of an AIK key on TPM?
0
votes
0answers
63 views

CPU instruction encoding on x86 that is free from ROP attacks

x86 has a dense instruction encoding, and thus enables ROP attacks. Are there any CPU instruction encoding schemes that are free from these attacks?
2
votes
1answer
76 views

Defeating code injection attacks in x86

In x86 systems, there are three requirements for a code injection attack to work: write attack payload to memory attack payload to be executable divert control-flow to payload How can we prevent 2)...
6
votes
1answer
351 views

AES-ECB chosen plaintext attack with long secret

I'm having some trouble understanding the methodology for a crypto exercise I'm doing. The goal of the exercise is to recover an encrypted secret string through a chosen key attack on AES in ECB mode. ...
1
vote
2answers
95 views

preventing reflection attack

I was reading the solution to the reflection attack and have some confusion as to how Alice would know Bob is a liar and isn't really Bob. 1. Alice initiates a connection to Bob 2. Bob challenges ...
11
votes
8answers
18k views

Is it possible to steal money directly from the systems of a big bank?

Sometimes I imagine: My money in the bank is just a floating point number in a mainframe's memory... So, if I just change 1 bit, I will win a lot of money... The most common way to steal money in ...
1
vote
1answer
100 views

Does adblockers(ublock) protect you from Malvertisement?

With malvertisement on the rise, I was wondering if it's as easy to protect yourself from it by just using an adblocker like ublock origin?
1
vote
1answer
289 views

Was I hacked remotely, how could I find out? Windows 7

I was cleaning out my old windows 7 HP desktop computer approximately 5 months ago. There was only the expired Norton 360 as far as antivirus and no firewall. Up until this point I disabled the wifi ...
6
votes
3answers
662 views

Random URL string: What kind of attack is this, and what can be done to stop it?

EDIT: It's been a little while since this was posted, but I'm here to report that this does NOT appear to have been some sort of attack after all. Rather, this particular URL string indicates a ...
-3
votes
1answer
50 views

What threats involve in cache miss

What are the possible consequences of a cache miss? In other word, is it possible that a cache miss could cause a security threat? Thank you.
1
vote
1answer
42 views

Possible threats on the memory buffer

If an adversary could identify a buffer's capacity, what would be the possible consequences?
2
votes
2answers
74 views

Violation of security principles?

It's clear that keyless entry fobs, smart entry cards, NFC, etc. are vulnerable to relay attacks. Suppose they were improved by limiting the period of activity, eg let them be active only when they ...
2
votes
3answers
169 views

What prevents a coder from brute forcing a wifi?

I know that a coder is able to connect to a wifi through code so my question is: Is there anything that will make it difficult to brute force a wifi password?
2
votes
2answers
303 views

Attack using weird characters followed by some javascript in a URL?

I'm seeing a very weird attack this morning from a pile of VPS instances spread out across the US. The URLs look like this: /js/bundles/,!0):this.element.propAttr( /js/bundles/&this.buttons....
2
votes
1answer
142 views

How can an attacker redirect victims through proxy

Let's say that an attacker is behind a proxy that's using NAT or PAT. Is it possible for him to redirect victims to his machine to achieve some attacks like web phishing or opening reverse TCP ...
3
votes
1answer
178 views

Challenge: How to find the secret key in homebrew MAC/keyed hash: sha1(key + cookie)?

I am trying to solve a security challenge on a website. Basically, the website computes sha1(key + cookie) to sign a cookie so that the user can't change it himself, and to accomplish the goal you ...
4
votes
3answers
262 views

Passwords propagation, Password Trend and Word Generator in Human Mind

Some passwords like "123456", "admin" are outrageously popular, so are the leet transformations and concatenation of digits. The users seem to pick up the password suggestions or just copy the ...
13
votes
3answers
4k views

Can you extract memory contents from a hibernated Windows machine?

In a recent discussion about hardware hacks, attacks surrounding Windows hibernate popped up. I am not entirely convinced that it would be viable to get stuff out of the memory saved to disk. When ...
19
votes
6answers
3k views

What security risks does IP spoofing bring?

By manipulating the TCP packet and changing the source address one is able to spoof the IP. As I understand it, you will not be able to set up a full handshake by doing this, as you will never receive ...
1
vote
3answers
140 views

CRIME attack - If Javascript can be injected on the attacked machine, why not directly sending the cookie to a remove server?

I read about the CRIME - How to beat the BEAST successor? question and answer, but I don't understand that: If Javascript can be injected and run on the attacked machine, why not directly sending the ...
5
votes
2answers
270 views

Ideas on how I can fragment captured network traffic?

I am trying to create a lab environment where I can analyze common IDS solutions (starting with Snort specifically) and their ability to reassemble fragmented IP trains. I have a collection of ...
3
votes
1answer
82 views

Host based code injection defense vs anti virus?

Recently I came across a paper titled Host-based code injection attacks: A popular technique used by malware. Another paper titled "Bee Master: Detecting Host-Based Code Injection Attacks", suggests ...
3
votes
2answers
382 views

how can an attacker access a system through a compromised router?

Let's say an attacker gained access to the admin panel of a home router with port 21, 23 and 80 open. I mean the attacker has full control over the router, thus being able to port forward, etc... ...
1
vote
2answers
574 views

TCP- or UDP-based Port Scans, IP Fragmented Packet

Is this normal or is someone trying to hack/attack me? How can I stop this? My router is a Cg3000v2 netgear provided to me by Optus. [TCP- or UDP-based Port Scan]411 Wed Aug 26 00:28:08 2015 27.253....
2
votes
3answers
199 views

Feasibility of time-based database brute-force attacks on websites

I recently learned that there is an attack that utilizes the fact that when brute-forcing a compared string (e.g. hash from a password or token) in a database the query fails a few nanoseconds earlier ...
3
votes
1answer
286 views

SSD Self Encrypting Drives - Setup / warm boot bypass

I've seen folks deploying the SED on laptops recently. I've discovered that there is a setting in which you can do a warm boot and NOT require the bootup password to be put in again. Which makes ...
0
votes
1answer
233 views

Thousands of 404s from various search engines

Since early April of 2015, my web site has been getting thousands of requests from many search engines for URLs that don't exist and never have existed. I found a similar, but less detailed, ...
2
votes
1answer
231 views

Rootkits, Bootkits detection and protection and Firmware alteration

I was hacked in an extremely intrusive manner in late 2013. Ever since then, not a day has passed where I don't think about this. A lot. My question has to do with the likelihood of the attackers ...
6
votes
2answers
886 views

UDP flood from my machine, or false positive?

The company that hosts my dedicated server has alerted me to what they think is malicious traffic coming from my machine. They supplied me with graphs showing a large amount of UDP traffic coming from ...
40
votes
4answers
6k views

Have computer criminals been known to exploit easily-edited websites like Wikipedia to embed malicious scripts?

When I was reading a page on Wikipedia several months ago (December 2014) I saw what looked like a pop-up window from BT, but I soon realized that when I closed the page the pop-up disappeared. I then ...
5
votes
1answer
157 views

Are there cases where malicious scripts on websites breached the sandbox of a browser so that files on the user's computer could be accessed?

Whenever a hosted script on a website tries to access a file on a user's computer the sandbox prevents it, but has there been any documented case where this sandbox obstacle was somehow overcome by ...
15
votes
4answers
17k views

What type of attacks can be used vs MongoDB?

I'm starting to learn MongoDB and was curious if it was susceptible to some type of injection attack similar to SQLi. Due to the nature of the DB, I don't think you can inject into it but... What ...
3
votes
1answer
124 views

Is this an attempted cross-site attack?

I have found various 404 errors in my web server log that look like this: http://mywebsite.com/go.php?http://pastebin.com/raw.php?i=ffdkafkjasd http://mywebsite.com/go?http://pastebin.com/raw.php?i=...
1
vote
3answers
185 views

Canvas fingerprinting identifies the OS?

I recently read this article, about how a journalist was hacked. She describes how they used a 'fingerprinting' technique to identify her OS. The way they use a one pixel image, it sounds like the ...
13
votes
1answer
1k views

Attackers of Google DNS hijacking

As we know Google DNS server (8.8.8.8) in 14th and 15th March was hijacked in Sao Paulo. And subsequent to this event, BGPmon.org announced an alert. Now, In a course assignment, we are asked to ...
1
vote
1answer
5k views

Router detecting constant ack flood attacks and port scans

I first noticed this yesterday in my logs - while I was configuring the router settings, so I don't know how long it's been going on. What should I do? I reconfigured my router with more secure ...
-1
votes
1answer
414 views

If someone downloaded 600GB , can that be ddos attack [duplicate]

Last night some one exploit some vulnerability in my site and then upload php script in my images folder. I have the Amazon EC2 server with centos. Now the Hacker downloaded 600GB and increased my ...
0
votes
2answers
115 views

If there is a malicious attack on one partition, is the other one safe?

I recently have used Bootcamp to set up a new partition and run Windows 7. About half of my HDD is designated to my OS X partition and the other half is allocated to the new Windows 7 partition. If ...
3
votes
1answer
114 views

What kind of attacks can target static resources?

Static resources and their caching interests me from the security perspective. Let's say we have an .jpg file requisted from the origin -> going through a reverse proxy with caching -> reaching the ...