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

learn more… | top users | synonyms

0
votes
1answer
24 views

How to check if my usb drives are vulnerable by BAD USB

Mark pointed out that only one chip type is vulnerable to BAD USB, id like to check if mine are, am using only Kingston flash drives here so can you tell me if they are, or if there exists a list ...
0
votes
0answers
7 views

Risks of booting from Live OS image on USB [on hold]

Beside the risk that a live system residing on a usb stick infected with bad usb could be infected in the first place, can the system booting from the bad USB device get taken over the same way?
0
votes
2answers
63 views

Monitor SSH traffic

Hi Folks, I was monitoring my SSH port with tcpdump and have had a lot of activity as expected. When I look at the traffic I get the above image. What does it mean? Thanks
0
votes
2answers
68 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 ...
0
votes
1answer
54 views

Have i been phished? [on hold]

I recently opened a link from a "friend", while I was on my workplace. It was some really simple stupid game "Super Mario" type. I opened it, played for 10 seconds and closed the link. What felt ...
2
votes
0answers
44 views

Case Studies of high profile hacks [closed]

Every hack happens because of a form of security vulnerability or another, and I feel that the best way to avoid/fix these vulnerabilities is to learn about them. Is there anywhere on the internet ...
0
votes
1answer
37 views

MITRE's UEFI 'Extreme Privilege Escalation' and HP's SureStart [on hold]

This is MITRE's powerpoint presentation version of their report: http://www.mitre.org/sites/default/files/publications/14-2221-extreme-escalation-presentation.pdf Page 54 is a straight pull from HP ...
0
votes
0answers
30 views

How Modification attacks works?

Theoretically... In Active attacks we have "modification attack"...ie "In a message modification attack, an intruder alters packet header addresses to direct a message to a different destination or ...
0
votes
3answers
81 views

Can the packets of a wireless network be sniffed by a user who is not present in that network?

1.If an user knows the frequency used by a wireless network, is he able to collect the packets from that network? Those packets may be encrypted, but can he collect those packets? 2.If the user has ...
3
votes
1answer
243 views

Can a malicious Tor exit node perform a HTTPS man-in-the-middle attack to see/modify your HTTPS traffic?

Let's say I am browsing the Internet using Tor - visiting https://example.com/login.php - and the NSA is operating the Tor exit node which I am currently routed to use. Can that NSA exit relay swap ...
4
votes
0answers
79 views

Kaminsky Bug DNS Cache Poisoning

I'm trying to use Kaminsky DNS cache poisoning method. I'm using bind9 server on ubuntu and static port. So far I achieved to insert a line into DNS cache which is ;additional www.blalba.com 80000 ...
1
vote
1answer
53 views

Slow HTTP DoS Mechanics

Our firewall detected and blocked a Slow HTTP DoS the other day. There were only a few attempts in the log. It wasn't a full on attack (there would be more traffic). My question is...if I'm an ...
9
votes
5answers
3k views

Using Google Search results to determine password strength

Google is a repository of Internet data, as it indexes tremendous amount of data. It uses a prediction service to determine the rest of the search query. With such a huge repository in place, can we ...
7
votes
5answers
404 views

Is there anything I can do about IDN homograph attacks?

I have been reading about IDN homograph attacks, and I cannot think of any better way than Tell my users not to trust emails asking for passwords, etc Buy all domains similar to mine (expensive and ...
1
vote
0answers
65 views

POODLE vulnerability solution : Effect on customer or client side

I am using windows server 2008 R2 and I have lot of customers who use windows XP,7 and 8 with some of them still using IE6. So now I want to disable SSL3 and enable TLS 1.1 as a security measure for ...
2
votes
3answers
67 views

Security coding training best approach

To train the development team, there are various options one can take: inhouse presentation with code samples, CBTs so developers do it at their best time, instructor-led courses onsite or inhouse ...
4
votes
2answers
358 views

Tor versus direct monitoring

I know if I use Tor and maybe made a tweet, it gives the government a really tough time tracing the originator. But what if like a police car was directly outside my home for instance. Is it still ...
2
votes
4answers
147 views

Is it possible to communicate securely entirely over the internet given a global, resourceful man in the middle?

Assuming a global, resourceful man in the middle, is it possible to Securely communicate (I don't mean storing encrypted data off site) completely establishing and sending messages over the internet ...
0
votes
0answers
41 views

THC-Hydra dictionary attack on JSP login form

I am trying to use Hydra to attack a JSP form but I have some confusion. Normally we use command something like this hydra -L list_user -P list_password HOST-ADDRESS http-post-form ...
3
votes
2answers
71 views

many csh http shellshock attacks

I administrate a public server that receives about a 100 csh HTTP shell shock per day from different sources. It is an HTTP GET Method that that requests the /cgi-bin/authLogin.cgi URI. Knowing that ...
6
votes
0answers
323 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 ...
3
votes
2answers
58 views

How to securely install software on Ubuntu?

How to install a software like Sublime Text on Ubuntu 14.04 LTS and mitigate against a MITM attack? There is a PPA available, but the PPA must be added manually. I don't see any PGP keys or MD5 ...
1
vote
1answer
48 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?
2
votes
2answers
106 views

John the Ripper not identifying a password contained in the username?

I have uploaded a screenshot of what exactly is going on, here: http://i.imgur.com/bJSv7C8.png I can see that single-crack mode includes a rule that looks at the username, and "slices" it to identify ...
1
vote
0answers
91 views

Example of a hacking attempt that failed because of a bug?

We hear all the time in popular press (and increasingly, in government publications + scholarly articles) about how "cyberattacks" make us insecure, because we have so many vulnerabilities (mostly ...
0
votes
1answer
55 views

How to prevent outgoing UDP attacks?

My server has been the target from hackers 3 times in the last month, and the attack seem to follow the same pattern. The attack another site from my server using UDP connection. The report from my ...
2
votes
2answers
55 views

How would an attacker know the Gateway IP's of 2 VPN endpoints?

My office has two Sonicwall Routers each at a different physical location and with two different ISPs. There is an SSL-VPN tunnel between the two. Today I noticed that the same Chinese IP address ...
0
votes
1answer
82 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 ...
8
votes
5answers
1k views

What Man-made Physical Threat Could Pose Severe Danger to a Server Farm?

I am writing a novel in which a researcher attempts to work against a study he is a part of by purposely sabotaging operations on the research compound. I am wondering if the following is plausible. ...
1
vote
2answers
149 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: ...
15
votes
2answers
884 views

Distance between two passwords

It is known that people reuse their passwords across different sites. The reuse can be done in two ways: using exactly same password for two different sites, slight modifying the password of one ...
2
votes
1answer
48 views

Are there theoretical attacks against ECC Digital Signatures?

I was asked to do a research about attacks on various digital signature schemes. There is one thing that bothers me for which I could not find a direct answer. For digital signatures that are based ...
1
vote
0answers
127 views

Is the process Wslxrqjet.exe, tagged 'Google Chrome', malicious?

Multiple instances (between 3 and 15) of this of this process Wslxrqjet.exe are running on my Windows 8 system at all times. Windows Task Manager 'Description' field for all instances is "Google ...
0
votes
0answers
27 views

Possible to run snort without modifiers?

Is there anyway (e.g some command line argument) with which we can tell snort to run and perform detection but without caring for the rule modifiers if there are any ? e.g alert tcp any any -> ...
0
votes
0answers
26 views

Smurf attack with Echo Protocol(RFC 862)

The Echo Protocol provides a feature like the ICMP-echo feauture. It's just a little bit different. The server sends an exact copy of the data it received. So my idea is, you could use this for an ...
0
votes
2answers
111 views

Prevent a file from being encrypted

Is it possible to prevent a file from being encrypted, or at least being easily decrypted in case of encryption? For instance; with the Crypto Locker malware attacking users, could you set up a ...
1
vote
0answers
82 views

POODLE vulnerability in Safari

I have been trying to mitigate POODLE on client side in my organization. I disabled SSL3 in most browsers but couldn't disable it in Safari. Apple released a Security Update 2014-005, which, ...
0
votes
0answers
58 views

Older Cell / Smart phones were susceptible to bluesnarfing / bluetooth attacks, Why specifically are smartphones secure from this attack now?

Older cell / smart phones were susceptible to bluesnarfing / Bluetooth attacks, Nokia phones in particular. But now in days, modern smart phone and cell phones that use Bluetooth technology for ...
1
vote
1answer
64 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 ...
2
votes
1answer
174 views

How does the Fake Authentication Attack from aircrack-ng work?

I'm making a school project about the AP attacks and I'd like to know how does the Fake Authentication Attack from aircrack-ng actually work and how to prevent it? I read a lot of articles but ...
1
vote
1answer
117 views

If I send 4mbps of data to a friend with 4mbps connection, will I DDoS him?

Suppose my friend has a connection of 4mbps. If I just send him 4mpbs of random data with my server, wouldn't it block his connection? Even if the router has firewalls and closed ports, isn't enough ...
1
vote
1answer
89 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( ...
0
votes
1answer
110 views

Open source alternatives to tamper data

I'm developing a browser(firefox) plug-in which essentially checks for malicious input. My current approach is to store all input fields sent in GET/POST requests, try to heuristically determine ...
1
vote
2answers
122 views

I was hacked, but I don't know why [closed]

Tonight I found by accident that someone had injected a bunch of crap links into the bottom of my personal site's index.html page. I thought it was a script at first, but after going into my FTP ...
1
vote
2answers
71 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?
0
votes
0answers
84 views

Victim loses Internet connection during MITM attack

I tried to do MITM attack on my network. I enabled ettercap, marked my router as TARGET1 and my second computer as TARGET2. Then I enabled 'ARP Spoofing'. I do not know why - but after this operation ...
1
vote
2answers
62 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 ...
2
votes
1answer
67 views

Is return oriented programming applicable to pure Java code?

I'm interested in ROP in the context of Java. For now, I don't consider the native code of the Java virtual machine. Is return oriented programming applicable to pure Java code?
3
votes
1answer
695 views

Are passwords stored in the cookie? encrypted?

Whenever I connect to security.stack.exchange, I am automatically logged in. I haven't allowed the browser to store my password. When I delete all cookies stored by the security.stack.exchange, I have ...
4
votes
1answer
109 views

Use of JavaScript by LastPass to encrypt & decrypt the password database a secure approach?

LastPass is a top-rated password manager that comes as a browser extension and uses a master password to encrypt and decrypt the password database using the JavaScript. Is this a secure way of doing? ...