Securing Linux systems and applications; understanding Linux security features.

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0answers
7 views

Detect SSH InBound / Oubound Connections

I'm noodling with the idea of managing SSH connections on Linux server using a program (not sure what it will be written in yet) that monitors inbound and outbound connections. Is there a way to ...
-1
votes
1answer
7 views

Is it possible to use obtained wildcard certificate on more than one server?

We are using two Debian servers in our company (with apache 2 as httpd) and our services are split between those two of them. One server has the website, the other has some minor sites under ...
0
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0answers
26 views

SSH on metasploit does not work [on hold]

I have a jailbroken ipad and I have open ssh on it put when i exploit it on metasploit I have got this error (on image) how to solve it ?? thanks
0
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0answers
23 views

Get root on MediaTek powered Hisense TV [on hold]

I am looking for methods to get root on my Linux smart tv. Anyone have any ideas? I ran metasploit against it and had no luck, it did find some open ports for upnp and something called twonkymedia ...
0
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0answers
18 views

What are null certificates in Gnome Seahorse? [migrated]

In the "Default Trust" tab in Seahorse there are several personal certificates named simply "(null)", which are issued by "No name". There's nothing on their property pages. What are these? Can they ...
3
votes
1answer
911 views

How configure tomcat 7 SSL to use AES-NI?

My server has AES-NI and I would like tomcat 7 to make use of this but I am not really sure how to make that happen or where to even start looking. I am quite familiar with tomcat administration, and ...
8
votes
2answers
272 views

Bootstrapping an EC2 Spot Instance

I'm considering using EC2 Spot Instances in an automated fashion (ie create a script that will request EC2 Spot Instances that will run unattended). For this specific use case, I'm happy to lock down ...
-4
votes
1answer
40 views

Kali Linux Veil-Evasion install problem [on hold]

I can't install Veil-Evasion. I have this error: Installing (Wine) i386 Binaries Reading package lists... Building dependency tree... Reading state information... Package wine-bin:i386 is ...
13
votes
3answers
665 views

ISO27001 and Linux/Ubuntu

My company has ISO 27001 certification. They provided me a new laptop with Windows 8 OS in it. I asked if I can have a Linux/Ubuntu OS installed, they said that it is not possible due to the ISO 27001 ...
0
votes
1answer
20 views

Affordable FIM, log monitoring, policy enforcement/checking, IDS? [on hold]

I've been working with OSSEC for awhile, and it's just been head ache. What are some linux Intrusion Detection Systems that do File Integrity Monitoring, Log Monitoring, and policy enforcement (same ...
12
votes
1answer
897 views

How to check if my USB stick firmware can be rewritten via the USB port?

How can I know in Linux (or otherwise), if the firmware of my USB flash drive can be rewritten using the USB port (when sticking it in an USB port)? Eg. for a cheap EMTEC 16GB. I was thinking about ...
23
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6answers
10k views

How to prevent BadUSB attacks on linux desktop

What can I do to protect my linux laptop from BadUSB attacks as described here? Perhaps writing an appropriate apparmor profile would help?
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0answers
39 views

How to reset an HSM server without password? [on hold]

I purchased an HSM online but I do not know the password. Is there a way to reset a HSM server?
1
vote
1answer
262 views

Log information for SIEM auditing in Linux

How can I know what all types of events generated by Linux. I can get this from the logs, but reading logs and noting ID's is very time consuming. All events might not be triggered. I need this ...
1
vote
0answers
49 views

Why use oddly compiled ELF files for Linux malware?

I ran file on some Linux malware ELF files that I've acquired over the last couple of years. I noticed some oddities: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), statically linked, for ...
2
votes
2answers
83 views

Is writing to /dev/null secure?

I am working on a web-service based crypto project in JAVA. The basic idea is for the client to send a SOAP request to a servlet to encrypt data. For data transmission I am using MIME/data-handlers ...
2
votes
1answer
226 views

Snort even though working properly does not report majority of rules

I have installed Snort 2.9.7.0 and it does not detect majority of attacks, such as nmap port scans, downloading exe files, opening documents containing keyword "root". I use Snort together with ...
1
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0answers
37 views

Anti-live forensic programs

Against dead forensics acquisition we can use disk encryption (we can use TrueCrypt for example). I was wondering do software exists against live forensic ? Can you give me a list for windows and ...
1
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0answers
17 views

Volatility Framework 2.4 - No suitable address space mapping found [closed]

I made some dumps with different formats (.DMP and some file made by LiveKD utility) in Windows 8.1 x64 OS. The first one is a explorer.exe dump file which was created by TaskManager->Create Dump File ...
1
vote
2answers
37 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 ...
-2
votes
0answers
15 views

How to use Kalibrate and rtl-sdr to detect my GSM modem? [migrated]

Would I use kalibrate and rtl-sdr with a D-Link HSUPA 3.75g GSM modem? When I try it and these programs don't detect this modem.
0
votes
0answers
30 views

Strange SECCOMP entries for sshd in audit log

I've posted this over at ServerFault but haven't received a response over there. I'm not a security professional, but I'm curious as to what kind of attack this might be and how the attackers might be ...
1
vote
1answer
33 views

RDRAND in Intel Celeron CPUs under Linux

Is there any reason to believe that the hardware RNG in an Intel Celeron CPU is more unreliable than in other CPUs? Can someone confirm that what Linus Torvalds says is true, namely that Linux does ...
2
votes
1answer
430 views

How to measure the integrity of the OS (Linux)?

I am working on a project which requires Integrity measurement of OS (Linux). One way to do that is using IMA but I am not sure if it fits in the scenario below. The scenario of the project is some ...
2
votes
1answer
134 views

Dump linux password in clear text

Is it possible to dump a Linux password in clear text format? In Windows it is possible to do so using "Windows Credential Editor".
2
votes
2answers
58 views

How to overwrite ebp on stack alignment?

I want to exploit a simple program #include <stdio.h> #include <string.h> int main(int argc, char** argv) { char buf[128]; strcpy(buf, argv[1]); return 0; } The disassembly ...
0
votes
0answers
77 views

How 'private' is my setup?

I'm currently running QubesOS (so essentially a virtualized Fedora operating system), which I use to access an offshore VPS through I2P (using garliccat). I then route all my traffic through the VPS ...
15
votes
2answers
3k views

Security Concerns with X11 Forwarding

What are some of the security concerns and reasons either for or against allowing X11 Forwarding. I have generally taken an approach of not allowing it under the blanket guise of security. Recently, ...
0
votes
0answers
15 views

At OpenSSH ssh server side key files has 0 data. I would like to know the reason for it

I am using the Monta Vista Linux. In this recently i have observed the ssh keys files has 0 data due to which the keys were not generating and i am not able to login to machine via ssh because of key ...
2
votes
3answers
324 views

Malware getting root access via “sudo” and “sudo -s”

Actually, I'd like to ask 3 questions. But since they are very related, I'll ask them all here. I use Ubuntu 12.04.4. Situation 1: I use Terminator, in one of its terminals I launch sudo iotop ...
0
votes
1answer
55 views

Gnome-keyring iteration count location

I know that Gnome-keyring hashes master password between 1000 and 2000 times. It picks random number. I would like to ask where does it save this number, what is the location of that file? As far as I ...
6
votes
1answer
125 views

Does the new Fedora package manager allow unauthorized installations?

I just upgraded to Fedora 22. The biggest change from the previous version is that the yum package manager is now replaced with dnf. One change I've noticed is that if you try to execute a command ...
4
votes
1answer
60 views

Desktop Flickers Past Lock Screen

I'm using Fedora 22 with Gnome 3. I have a password set for my user account, so when my laptop awakens from sleep, I am presented with the lock screen and must enter my password before getting to my ...
0
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0answers
10 views

How to set up iptables [migrated]

I try to understand how iptables works but after a lot of hours and read a lot of articles i have stuck. That i want to do is DROP INPUT & FORWARD policy and open some ports. More specifically, i ...
1
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0answers
7 views

AppArmor: Are multiple profiles per application (Firefox, Thunderbird) possible? Syntax? [migrated]

Is there a way to create an AppArmor profile for each Firefox profile, when running multiple profiles off a single installation of Firefox? Or more generally for any application supporting multiple ...
4
votes
1answer
103 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 ...
1
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0answers
20 views

Linux PAX, execute and write permissions

I would like to know what happens when a section of a program is compiled with both execute and write permissions and PAX is enabled on the system? Is the program successfully loaded? Is the section ...
2
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2answers
45 views

Are there any dangers in sharing ifconfig information publicly?

If I were to share my ifconfig information from Linux publicly, is there any possible danger associated with this action?
0
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0answers
11 views

RSA Fingerprints on EC2 Server Don't Match Locally Generated Fingerprint [migrated]

I have an EC2 instance with an elastic IP that hasn't changed in a little while, nor has the ssh key Amazon installed in the main user account used to ssh into the server after instantiation. I ...
-5
votes
1answer
54 views

How to use wordlist [closed]

I have downloaded a wordlist from https://crackstation.net/buy-crackstation-wordlist-password-cracking-dictionary.htm The size of the wordlist is 4.2 GiB (compressed) or 15 GiB (uncompressed) The ...
5
votes
5answers
851 views

How secure is it to keep the salt with the password hash? [duplicate]

In Linux we have the salt just next to the password hash in the /etc/shadows file. I always hear that salt value prevents hashed passwords from being cracked by brute force methods. But if somehow we ...
3
votes
3answers
316 views

Error message in Apache logs shows /bin/bash and wget

I am wondering if my server is compromised or not I just looked at my log and seen the following line in there [Thu May 14 09:10:42.587255 2015] [autoindex:error] [pid 3422] [client ...
3
votes
2answers
305 views

Current industry standard key management solution for web app on linux host

The scenario: Data is sent to an application server and you want to selectively encrypt some data before sending it to a DB server for storage. All servers run some linux distro. This is a relatively ...
0
votes
2answers
70 views

How to make data in hard disk unrecoverable on linux [duplicate]

I need to wipe completely the data on my hard disk so it's unrecoverable. I'm actually using Linux, i have seen this command on the web, but I don't know if its secure. shred -zvn 35 /dev/sdb
1
vote
0answers
26 views

OpenWRT: iptables rules will be deleted automatically [migrated]

In my OpenWRT instance, I have added iptables rules in the Input filter table, but the problem is when I turn on my system I found that the rules are deleted. What can I do so that the rules are not ...
5
votes
1answer
119 views

Video site requests Adblocker to be shut off, next day I have 3 “weird” bookmarks

I was on a site trying to view a video and the site requested that I turn off my adblocker to view the video. So I did and then the next day I noticed that I had 3 "weird" bookmarks in my bookmark ...
0
votes
1answer
70 views

When can the exploit for CVE: 2006-7098 be used?

I'm studying the vulnerabilities of an old version of Apache, the 1.3.34. And I don't quite understand in what exact situation the CVE 2006-7098 vulnerability can be exploited. The README included in ...
4
votes
1answer
40 views

Can BTRFS provide authentication on an encrypted disk?

One of the problems of disk encryption is providing authentication. An attacker with access to the ciphertext can modify the ciphertext at will without consequence. Given, this isn't a likely attack, ...
0
votes
0answers
40 views

TPM Command Line Tools

I am trying to create a key storage hierarchy on TPM (Trusted Platform Module) on Linux (CentOS 6.4). The most commonly recommended TPM tool suite on Linux is TrouSerS. However, the command line suite ...
6
votes
2answers
2k views

How to pass PCI DSS 2.0 anti-virus requirement (5.1) on Linux?

PCI DSS 2.0 Requirement 5.1 states: 5.1 Deploy anti-virus software on all systems commonly affected by malicious software (particularly personal computers and servers). This requirement ...