6
votes
1answer
261 views

How does virtualisation (IaaS) protect from CPU microcode updates and firmware changes?

Is it safe to assume that it's impossible for CPU Microcode updates and firmware updates to be initiated from a guest VM? What software or hardware technologies protect my guest OS from altering or ...
7
votes
3answers
2k views

Is my session-less authentication system secure?

So, I've created an authentication system. Poured over it for any kind of security flaws and tested the crap out of it. I think it's fairly secure, but there is one "different" by-design aspect of it ...
1
vote
1answer
522 views

RADIUS proxy chains

RADIUS is a widely deployed remote authentication protocol. I'm looking here at its use in wireless roaming. The RADIUS protocol allows for proxies and chains of proxies: |CLIENT|<->|Access ...
2
votes
1answer
243 views

How to safely “remember” login information in a program [duplicate]

Possible Duplicate: How to Securely Implement a “Remember Me” Feature? I have a program that communicates with a server. The user must log in with the application which runs on their ...
3
votes
1answer
444 views

If most companies do not enable TLS for SMTP and IMAP, should we consider email not secure at all?

Many of our partner companies's email service do not enable encryption. Does that mean our email is not protected at all?
3
votes
3answers
4k views

How can one decrypt a SSL/TLS session? Besides the private key what else is needed?

Suppose I have a non-DHE-based TLS session stored in a Wireshark or Netmon trace. What is required to decrypt this data? Is the private key of the certificate all that would be needed? What ...
4
votes
3answers
17k views

Best practice to block Dropbox usage

We have users sync their data at company with their home computer. What's the best way to block it? Block *.dropbox.com Find out all dropbox IPs and block IPs. For windows users, deploy GPO to ...
8
votes
1answer
275 views

How can I limit the consequences of a possible future identity theft?

I am curious about how I can limit the consequences of an identity theft. I see a lot of discussion and advice about managing passwords securely or blocking malware. But what if it happens? What if ...
6
votes
3answers
3k views

System time and certificates

Recently I accidentally changed the system time to a different month, and then I surfed to a secure site. I got a warning from Google Chrome that mentioned my system time and said the certificate ...
4
votes
6answers
720 views

Is hacking back a valid security technique for companies?

Recently it has come to light through the reverse engineering of hacking tools that there are vulnerabilities in them that could be exploited to take over an attackers computer during a remote hacking ...
2
votes
2answers
5k views

What approaches are to detect DoS attack in IDS/Firewall?

First approach to DoS attack detection: There are techniques for intrusion detection, and of course DoS attack, in which for each packet (or flow) some features are calculated, then based on some ...
-1
votes
4answers
5k views

why Windows Firewall in XP cannot block outbound connections [closed]

wikipedia say: XP's Windows Firewall cannot block outbound connections; it is only capable of blocking inbound ones. another article says: XP defends you with your traffic coming from the web but ...
2
votes
5answers
581 views

Does shuffling a hashed password increase its security?

I am making a web app and I'm now stuck on making the login secure. I'm thinking of adding a salt to a user-inputted password and then hash it. (md5 or sha for example) and then I will reshuffle the ...
1
vote
1answer
192 views

How safe is WSIT username authentication with symmetric key?

I have an ajax-ws web service (exposed via glassfish) that uses username authentication with a symmetric key to encrypt and authenticate clients(link). How secure is this mechanism? Is this enough to ...
2
votes
2answers
327 views

I need explanation on how serious these vulnerabilities are?

I have found two vulnerabilities on my college site and I want to report them but don't know if these are "really" vulnerabilities : RFI inside SWF file. Example: ...
0
votes
3answers
143 views

Does AV software protect web applications (Twitter, Facebook, etc) from attacks? (CSRF, etc)

Is it correct to say that AV software focuses on downloaded executables and locally malicious activity, and it doesn't actively scan HTTP/S content for web based attacks such as CSRF, XSS, phishing ...
1
vote
2answers
227 views

Is there guidance that says all sessions to be logged off when a user changes their password?

Often when an account is hacked, security guidance is to change your password. However I've noticed that changing a password sometimes isn't enough to log out of other sessions that are active. Is ...
4
votes
3answers
829 views

Two-Factor Authentication: When is it worth it?

I was reading this article, and it triggered the question: Why not use two factor authentication? In his case, it both possibilities were enabled anyway, so this looks to me like it's two attack ...
2
votes
3answers
168 views

How to tell what viruses are covered by your anti-virus software

One of our corporate twitter accounts recently started sending out DMs to its followers. Looking at the content of these it seems we'd become infected with Troj/Mdrop-EML. All computers on our ...
0
votes
2answers
154 views

Improve SSH logs

I want to improve my SSH log. I would like to basically be able to see failed attempts with ip address and the password used. is that possible? Right now I see something like this: Failed password ...
70
votes
13answers
6k views

VP of IT claims he unhashed 100% of all 16k employees' PWs. Is he lying to us?

I work for a company which has ~16,000 employees. Periodically, our VP of IT sends out a newsletter with "tech-tips" and misc IT stuff. The topic of this week's newsletter was "password security". ...
5
votes
3answers
451 views

Does GOOD Dynamics Proxy comply with EU data legislation?

My client is excited about GOOD technology; it allows them to have controlled access to business applications & email from BYOD (bring your own devices) and will enable a more mobile workforce. ...
13
votes
1answer
2k views

PGP: How is it possible for me to read a sent mail, encrypted by me with the recipient's public key?

I'm quite new to OpenPGP and am just starting to use it with Thunderbird. When I encrypt a mail with a recipient's public key, using Thunderbird + Enigmail + OpenPGP, and send it, I can find the ...
-4
votes
2answers
100 views

Any good products that could crypt the files stored in laptops? [closed]

Thefts of laptops have become very common at my place, and losses of sensitive information is a a major concern for my businesses. So I wonder if there is any good products out there that could crypt ...
3
votes
1answer
4k views

what is the role of RADiUS server and Active Directory to increase the security in wireless networks?

In the CBT Nuggets Video Training, one slide about Wireless networks : i want to know about the role of Radius to increase the security and how? in this project: Deploy Active Directory and ...
1
vote
1answer
311 views

Fake email sent through newsletter service: how to know who sent them?

Suppose a guy sends emails through a service that sends newsletters, but he copies an invitation sent to him, and uses this service to send more invitations to uninvited people, and puts the email of ...
0
votes
1answer
2k views

Another method to erase hard drives securely? [duplicate]

Possible Duplicate: Use truecrypt to make data unrecoverable The other day I was thinking, and I looked up this question because I was pretty sure a question similar to this had been asked. ...
4
votes
2answers
12k views

Discover what workstations a user us connected to in a Windows AD Environment?

I currently have a naughty user in my environment. We don't want to set any alarms of (even from speaking to the AD admins), and wish to discover the workstation the user is connected to in our AD ...
3
votes
1answer
594 views

How do I configure Terminal Server (and clients) for use over untrusted Wifi networks?

Suppose a client wants to directly connect to Terminal Server exposed to the Internet, without a VPN, ... what software & settings is needed to properly protect against WiFi based attacks? ...
3
votes
1answer
213 views

Can we use a public key scheme for performing cryptographic commitment

Is it possible to use a public key scheme such as DSA as a commitment scheme? Are there any problems with doing this?
0
votes
2answers
119 views

Display all packets but not these TCP packets? [closed]

I'm trying to filter packets with wireshark, I would like to display all packets but terminal service communications, but if I do: tcp.dstport != 3389 && tcp.srcport != 3389 It would ...
12
votes
4answers
483 views

How to safely synchronize time over Internet?

All modern OS now keep accurate time by regularly synchronizing time over an untrusted network - Internet. Could an attacker conducting a MITM attack, influence or change the time of a computer while ...
2
votes
1answer
2k views

cookie issue with same domain same path but different port

I have two web app running on same host on same path but on different port http://somedomain.com/ and https://somedomain.com/ now when I visit first app it serves the cookie say with name abc, and ...
20
votes
7answers
4k views

Safe to make a VPN connection over coffee shop WIFI?

On my work laptop I regularly create a VPN connection that I use to remote desktop to our web server. Is this safe to do on a coffee shop where random people are connected to the same wifi network?
3
votes
4answers
2k views

Client Certificate in SSL HandShake insecure?

Imagine we have an application which is trying to establish a secure connection to a server by using SSL. Now we want the user to authenticate himself with a client certificate which he stores in an ...
6
votes
1answer
935 views

Do I need to keep the NTLM token in the HTTP Authorization header a secret?

I'm troubleshooting a problem with one of our vendors and plan to send them a Fiddler trace of the http traffic between the client and our servers while replicating the issue. Our servers use NTLM ...
5
votes
1answer
430 views

API Design Model - Client Side Encryption

I'm currently designing a API Model to use. A user will have a 'secret_api_key' and a 'public_api_key'. They will send a request to my server with the public key, the form data, and then a hash. The ...
8
votes
6answers
4k views

How can I send emails anonymously?

How can I send email anonymously? We used to track email's IP and its location based upon the email headers, and there are many possible ways to track the email's id's which were sent by the anonymous ...
0
votes
2answers
546 views

OpenLDAP version 2.4.24 at risk? Site to check for known vulnerabilities with version used?

We use OpenLDAP version 2.4.24 $ /usr/local/libexec/slapd -VV @(#) $OpenLDAP: slapd 2.4.24 (Mar 5 2011 06:36:43) $ steve@sunblade2500:/bigdisk/SOURCES/S10/openldap-2.4.24/servers/slapd ...
8
votes
1answer
631 views

Better way to import Win32 APIs from injected shellcode

I'm injecting native x86 code into a .NET application, via a TLS callback in the binary image. Unfortunately, .NET executables only import mscorlib.dll within the PE, and have kernel32.dll mapped ...
53
votes
2answers
25k views

ssltest: Chain issues - Contains anchor

I've run ssltest on web application and it found "Chain issues - Contains anchor" (section "Additional Certificates (if supplied)") What does it mean? Should it be fixed? Can it be exploited?
6
votes
3answers
29k views

Windows Firewall - how to block inbound for all .exe files in a folder

In Windows Firewall with Advanced Settings I can create a rule which blocks all inbound or outbound traffic for particular program by pointing to its .exe file. The problem is that this program has ...
8
votes
2answers
4k views

Not clear on ssl renegotiation vulnerabilty

When we read about TLS Renegotiation vulnerability, does it mean that a server is not supposed to ever accept renegotiation during a secure connection? I thought that by renegotiation security is ...
7
votes
6answers
1k views

Are there any hardware HSMs that can host/run custom applications using the HSM processor(s) within the hardened security boundary?

It seems that the majority of commercially available hardware HSMs are only designed to allow authenticated users to generate, store, and use cryptographic keys with various cryptographic algorithms ...
7
votes
6answers
11k views

How to detect eavesdropping by your ISP

I've noticed some funny behavior lately with my home Internet connection such as connections dropping frequently, rate limiting occuring, and packet loss. I know how to get around this online, use a ...
4
votes
3answers
669 views

Are honeypots successful in preventing attacks?

I've been looking to set up a honeypot, but it seems that honeyd's source code is out of date, and there are few other options. Which brings me to the question, does anyone employ honeypots as a ...
7
votes
2answers
259 views

How serious is a local virus in terms of network security

My colleague got a notification on his machine of a possible virus (through the virus scanner that is installed by default on all machines). He called up the tech department, and they simply told him ...
2
votes
1answer
297 views

White-Box Cryptography Questions and References

I have recently started reading about White-Box Cryptography and looking at references/papers/web sites. A have a few questions I was hoping to get guidance on. As far as I can tell, WBC has ...
2
votes
3answers
3k views

TOR and sniffing data

If I'm not mistaken, TOR works opening a random anonymous path between two hosts using others computers that have TOR installed no? Then... everybody can sniff the data of the others no? Just wait ...
0
votes
1answer
222 views

DoS anomaly-based detection: simplest approach beside simple threshold

As I learned, there is this technique in which the number of bytes/packets/frames of aggregated traffic is being checked to see if they deviate from a normal behavior. Then the time slot of that ...

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