1
vote
1answer
64 views

Port forwarding with VPN

EDIT: My VPN has port forwarded a 5-digit tcp/udp port for me. What kind of attacks am I opening the computer to with VPN port forwarding?
0
votes
0answers
147 views

IPSEC GRE packets based on key value with IP xfrm command

am trying to selectively encrypt GRE packet based on Key value in header using IP xfrm command in linux. Following commands are used for key value 3 ip xfrm state add src $machine2 dst $my_ip proto ...
8
votes
1answer
1k views

Why is plain dm-crypt only recommended for experts?

I am curious about the following claim from the Cryptsetup FAQ: 2.4 What is the difference between "plain" and LUKS format? First, unless you happen to understand the cryptographic background ...
0
votes
2answers
560 views

Can I VPN a phone's connection to my home network, and then apply my home firewall to my phones network connections?

I have a decent firewall/router at home, and I was wondering whether it would be possible to use my home firewall for the connections that my phone makes, even when I'm not at home. It would mean ...
3
votes
1answer
2k views

VoIP call security: How does encrypting signalling protocol (SIP) protects RTP?

Checking the data packets from many VoIP applications shows that SIP packets are encrypted with TLS. So the captured session shows no SIP signals at all, just simple TCP and TLS/SSL packets. But ...
-4
votes
2answers
2k views

What's the risk of opening ports 1-65535? [closed]

Just going to say this right now; this seems absolutely ludicrous. I've had a problem with playing Super Smash Bros. on Wii U ("Cannot connect to partner's device."; also happens for all ...
1
vote
0answers
121 views

Does bitlocker have protection against accidentally deleting metadata? [closed]

I have a big problem. I inadvertently deleted a partition, which I had installed win7 BitLocker Crypt, so the entire partition was encrypted. I found a recovery tool which is called "DiskInternals EFS ...
0
votes
2answers
155 views

Is this sufficient text cleaning in a PHP Form?

Wondering if the following is sufficient for sanitizing input in a simple contact form that contains inputs for $name, $email, $phone, and $text. There is no SQL. I am simply wondering if I am doing ...
0
votes
4answers
179 views

Custom CSRF protection mechanism without persisting tokens

I have had this functionality (csrf protection) for quite some time now. The thing I never liked about it is that it saved csrf tokens in the session file. While it may not be a real problem I see it ...
7
votes
1answer
4k views

SSL certificates and cipher suites correspondence

I have been learning about the SSL/TLS protocol (from https://tools.ietf.org/html/rfc5246) and have a few conceptual questions about the protocol. The client and server exchange "hello" messages ...
0
votes
4answers
325 views

how we know whether our computers are part of a botnet? [closed]

When we visit websites, unknowingly our computers can be a victims of a botnet. There should be a way to identify whether we are victims or not. What is the way to identify it and how to recover from ...
0
votes
2answers
294 views

Getting the uploaded file path without knowing the uploading destination

Imagine a scenario that we are able to upload a PHP file on the server. However, we are not aware of the uploading path. I simply mean that, we are able to upload the file but we don't know where it ...
2
votes
3answers
74 views

Utility to build IP exclusion list? [closed]

Are there any utilities out there that can assist in building an IP exclusion list? Scenario: Recently suffered a brute force attack where 50000 failed login attempts came from a multitude of ...
0
votes
0answers
393 views

Sysinternals tool suite not working on low priv shell

Currently oscp student. I asked this on the oscp forum yesterday, but no responses so far. I am new to infosec, but have 18 years of education / work experience in IT. As far as I can tell, ...
1
vote
2answers
79 views

Must a Diffie-Hellman group value persist?

I've been reading about the Logjam attack on Diffie-Hellman and about how to secure our TLC-based web servers based on the recent findings. The guide suggests that we create a Unique Diffie-Hellman ...
0
votes
2answers
84 views

Advantages of Enabling Firmware Password Protection

What security advantages, if any, would be gained by enabling Firmware Password Protection on a mac that allready has filevault encryption for the disk?
2
votes
0answers
79 views

If someone hacks our server, how can we prevent them from decrypting data stored in Vault?

I have been tasked with evaluating Vault in our company and the first question asked by an architect was: If someone hacks our server, how can we prevent them from decrypting data stored in Vault? ...
3
votes
1answer
363 views

How to detect changing IP address and user agent on a HTTP session?

I have some HTTP logs where I see the hacker changing his IP every request, and occasionally changing his useragent. Is there a way to detect this automatically? Perhaps a snort rule? or any other ...
1
vote
2answers
87 views

How to use Aircrack-ng when knowing part of the password?

Let's say I know the password starts with "1234" and after that there is a commonly used password. I would like to use the word list I have for the second part of the password, but to include somehow ...
7
votes
2answers
6k views

Obsolete cryptography (SHA1) warning although certificate uses SHA256

I ordered a certificate with SHA256 from Comodo and was wondering why Chrome shows this message: Your connection is encrypted with obsolete cryptography. The connection is encrypted using ...
2
votes
2answers
50 views

Which software RNG for linux?

A headless server can suffer from a lack of entropy, which is a problem given that encryption needs random numbers. In the absence of a hardware random number generator (RNG) the numbers must be ...
5
votes
1answer
316 views

How secure is CertiVox M-PIN?

CertiVox have designed a system with the aim of "getting rid of passwords". Essentially the system authenticates users with two factors of authentication: A 4 digit PIN and a token stored within the ...
2
votes
1answer
106 views

mis-use of email address to obtain services from Groupon [closed]

I recently bought a new domain name "familyname.net" and I redirect emails to this domain to my normal email address. Recently I received various emails, one of which came from Groupon to confirm the ...
1
vote
1answer
90 views

Penetration testing approach - Is there a better method? [closed]

Currently looking at getting some of our web sites pen tested but there are some many companies offering the same, and who are probably using the same tools (not to mention the same wordpress layouts) ...
1
vote
1answer
157 views

Is it ok to have GRANT ANY ROLE privilege granted to an Oracle account which is expired & locked?

I know it's not considered secure to grant GRANT ANY ROLE privilege to other users apart from admins. But what if the user is expired & locked? In particular, I see these 2 users having this ...
3
votes
1answer
99 views

Hooking an *unexported* API

I want to know is there any way to hook (inline hook) an unexported API of a PE? I have this binary (PE 32 bit) which does not uses any DLL (A statically linked binary) and I would like to know what ...
0
votes
1answer
419 views

Google Chrome obsolete cryptography

I have a apache server running and following configuration for ssl: Header always set Strict-Transport-Security "max-age=31536000; includeSubDomains" SSLProtocol -all +TLSv1.2 SSLCompression Off ...
25
votes
5answers
3k views

Why do “Forgotten Password?” links generally reveal usernames or registered email addresses? [duplicate]

It seems that most sites or systems will just state Invalid username or password As a means to not reveal usernames for use in brute force (and other) attacks. Seems like a good idea as a ...
0
votes
0answers
116 views

SHA-2 migration considerations

due to SHA-1 being in the path of deprecation, i will be migrating my SSL certs to SHA-2. Besides creating CSR using SHA-2 for signing, what other considerations should I take note of? I believe one ...
2
votes
1answer
45 views

Certificate identification that is renewal safe

We currently use some certificates in our application and we identify them by using the certificate's thumbprint. Like this: <serviceCertificate> <certificateReference ...
3
votes
4answers
1k views

How to detect self destructing emails? How to prevent from self destruction?

Recently I came across a gmail extension for Chrome browsers which claims to send self destructive emails. I tested by sending self destructive emails to my email account and it works fine Now my ...
0
votes
0answers
82 views

Wifi Pineapple :Modifying white list by client

If wifi pineapple maintains a whitelist with specific ssid's, then it responds to only those ssid probes.Is there any method or tools by which I can access/modify/interact with wifi pineapple's white ...
1
vote
1answer
124 views

Credentials for scanning a database server's vulnerabilities [closed]

what is the required credentials for scanning a database server's vulnerabilities by using vulnerability assessment tools such as Rapid 7 Nexpose?
2
votes
1answer
118 views

Abnormal SYN traffic from Blackhole DNS servers

I have been getting alerts from an anomaly based signatures for abnormally high SYN traffic. The traffic is coming from blackhole DNS servers. I hadn't had any experience with Blackhole servers prior ...
5
votes
2answers
91 views

SSH: Security of Pubkey Authentication vs Password

Why is Pubkey Authentication considered more secure than a password, and does this apply to my situation (described in more detail below)? I'm a scientist (no formal IT training), but I built and ...
1
vote
1answer
300 views

Are there any security disadvantages of using production SSL certificate in non-prod environments?

My client has a wildcard certificate *.thierdomain.com that they are using for half a dozen of production web sites. For each of theses sites there are duplicates in several environments, dev, qa, ...
0
votes
1answer
148 views

What exactly does ipsec and ssl do? [duplicate]

Im trying to figure out how SSL and ipsec works. I know the process in both SSL and ipsec but why do I need SSL if I can use IPsec when it runs below the transport layer. Wont IPsec encrypt everything ...
1
vote
3answers
3k views

Can a network admin see my computer's screen if I'm logged into their wifi network?

I had a friend try to convince me today that simply by signing into a wifi network, without any physical access to your computer, the network admin can see your computer's screen. Obviously this is ...
2
votes
2answers
197 views

How would iOS or Android app “firewall” for extended permissions (location, etc) work?

I'm interested in blocking or reporting any application's usage of extended permissions, regardless if they are granted those rights, such as: GPS / Location / Wifi Radio signal data Telemetry My ...
-2
votes
1answer
226 views

IP hijacking during SSL

I was wondering, does SSL protect from IP hijacking (an active, authenticated connection between two hosts is disrupted and the attacker takes the place of one of the hosts) and how?
15
votes
5answers
3k views

Are consumer-grade routers any more or less vulnerable? [closed]

I apologize if this is an obvious question, I'm not very familiar with hardware. I am planning on hosting a few personal websites from my home, but I'm concerned about my security. I'm using a fairly ...
2
votes
1answer
52 views

Who can see the traffic of others in different kinds of LAN

I would like to consider three types of LAN: a) 2 computers are connected to a Hub, this Hub is connected to a router for e.g. internet access. b) 2 computers are connected to a Switch, this Switch ...
5
votes
1answer
1k views

What is the “Moose” worm and how can I protect myself from it?

I have heard from others that there is a new worm called "moose". This actively targets and exploits home routers. What are the effects of this exploit? How can I protect myself from this? Can I ...
3
votes
1answer
118 views

Is a newly installed server with no services running (but connected to the web) at risk?

A new server has just been installed but literally has nothing else running on it, no services setup to SSH in or anything yet (it's a Linux server). However, it is hooked up to the web so I can ...
1
vote
2answers
171 views

Server full disk encryption protection from malware

A group of LINUX servers is using dm-crypt to encrypt data. The servers do not store data long-term but are only temporary stopping points for data before it is sent to other systems. The time the ...
0
votes
0answers
183 views

Exchange Autodiscover XML question (Exploit related)

Recently we had an issue with the Exchange autodiscover.xml appending ".com" to our mail servers autodiscover address. It resulted in a certificate error due to the name not matching the certificate. ...
2
votes
1answer
119 views

How do I audit the effect of security policy on a computer?

I have developed different templates for local security policy. I have been using the program Nexpose to test the effects of those security policies but so far I am not able to detect the visible ...
2
votes
0answers
121 views

chroot ssh users [closed]

I am using CentOS 7. I need to give shell access to ssh users but restrict them in a jail. I have used jailkit to set up the jail. I have copied all necessary libraries, binaries that are needed for ...
0
votes
4answers
149 views

What mail applications use crypto?

I just read that everyone in the world can ready my mails (if intercepted in traffic by eavesdropping?). Also, it reads that current versions (book's from 2004 so I assume that new versions adopt ...
2
votes
2answers
128 views

Certificate chaining:Intermediate Certificate Authorities

Wikipedia says: For example, if a certificate issued to "example.com" and issued by "Intermediate CA1", and the visiting web browser trusts "Root CA", trust may be established in the following manner: ...

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