CentOS is a free operating system distribution based upon the Linux kernel. It is derived entirely from the Red Hat Enterprise Linux (RHEL) distribution.

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Joomla Linux Permissions

I installed Joomla 3 to /var/www/html directory in Cent OS 6 server. Currently /var/www/html is owned by apache:apache. What is the recommended permissions for Joomla installation on Linux in ...
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removing SSLv3 does not seem to fix POODLE problem [duplicate]

I have removed SSLv3 from my Apache 2.2.15 ssl.conf file with the line SSLProtocol All -SSLv2 -SSLv3 I have restarted httpd but POODLE tests still show vulnerability exists with POODLE. What else ...
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1answer
128 views

Can shellshock be used on a system with public webpages but restricted server access?

I want to know if my servers are still vulnerable under the following conditions... My servers are private - only myself and trusted developers have access to them We have enabled executables within ...
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Can't access MySQL command line after yum update Centos [migrated]

I need help I just run yum update on my centos 6.5 still not Reboot system and i can't login by command mysql [root@localhost]# mysql mysql: relocation error: mysql: symbol strmov, version ...
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2answers
94 views

OpenSSL updating ciphers suites

For PCI compliance I was required to protect our server against BEAST attacks. While I have correctly configured the apache / openssl settings to pass a scan, these settings have effectively limited ...
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1answer
77 views

How could someone change a root password without modifying `chage -l root` date?

How could someone change the root password without changing chage -l root Last password change date? I know it was changed because it does not match the value in Keepass. I noticed when I tried to use ...
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1answer
780 views

How to whitelist IP address mod_security CentOS 6

Is it possible to white list an IP address in mod_security? I found white ist whole domain name in mod_security. But I want to white list only the administrator IP. OS: CentOS 6 Server: Apche httpd ...
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1answer
45 views

Are there any exploits in Movable Type that allow the attacker to delete the movable type files?

I'm a developer for a web site; we have a small blog powered by Movable Type that we added a few years ago. The blog doesn't get a lot of traffic or attention; we just noticed a couple of days ago ...
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2answers
325 views

How to prevent attacks to server

I have 3 CentOS server configured for my applications. Recently I recognized that there is so many attacks to my servers. I have so many logs about attempt to login to my servers using sshd from ...
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2answers
995 views

Outbound DDOS attack from a centos server

We run a mail server (postfix/dovecot/centos 6.4). The hardware is based on a supermicro chasis with IPMI features. It also runs a web interface for accesisng mails(Apache web server ) Recently our ...
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0answers
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Test S/KEY support for PCI compliance - CVE-2007-2243

In order for our business to be PCI compliant, we need to prove that we are not vulnerable to CVE-2007-2243. This states that: OpenSSH 4.6 and earlier, when ChallengeResponseAuthentication is ...
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1answer
390 views

Does connection that use 0.0.0.0 in Foreign Address secured?

When I run my application on Centos the specific process opens port that listens for connections from localhost, but uses 0.0.0.0 in Foreign Address. Is it secured? netstat -plunt Active Internet ...
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2answers
453 views

CentOS for security testing?

I am a QA Engineer, but have been tasked with creating a security testing platform. I have many years with Backtrack/Kali and my primary OS are Arch and Ubuntu. The Systems guys here gave me a CentOS ...
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2answers
393 views

Someone logged on my Centos VM; Can they attack the host OS?

I'm using Windows 7 and decided to learn Linux Administration (Centos 6.4) using Oracle VirtualBox to host the Linux system. In my network configuration I choose "Bridged Adapter". I set the VM's IP ...
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0answers
245 views

Nessus scanner and Red Hat backport security updates

I have asked this question: False positive Apache version in scanner results on Centos I need additional clarification: Do you know if it is possible to configure Nessus to adopt Red Hat backport ...
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2answers
324 views

False positive Apache version in scanner results on Centos

Recently I need to care a lot of false positive vulnerabilities in scanner results on Apache version. Example of false positive vulnerability: Apache 2.2 < 2.2.16 Multiple Vulnerabilities Our ...
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1answer
8k views

How to harden SSH on CentOS 6.5

I have a new (first time) CentOS 6.5 server being used for a web server. Our security team has identified the following weakness: The SSH server is configured to allow either MD5 or 96-bit MAC ...
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1answer
303 views

Installing Joomla with nobody:nobody user/group (CentOS/cPanel)

If you are installing Joomla via cPanel's File Manager to your mywebsite.com (user mywebsite) account, you will upload the package to your server and extract the archive. All files will have the user ...
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1answer
264 views

OSSEC on an existing running machine

I am setting up a OSSEC on existing running machine. From my research I find that I should be running the following command to check for previous intrusion. zcat /var/log/*.gz | ...
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1answer
591 views

Afraid about SSH on my Linux system

I've checked my Linux server (Centos 6) with rkhunter. I found the following in rkhunter log [14:38:54] Checking if SSH protocol v1 is allowed [ Warning ] [14:38:54] Warning: The SSH ...
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1answer
916 views

How to remove ssh rootkits? [duplicate]

I checked my linux server with rkhunter, I got following warning messages, ... [00:35:35] Found file '/usr/include/gpm2.h'. Possible rootkit: Trojaned SSH daemon [00:35:35] ...
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4answers
409 views

Is a short sudo password ok?

On a server I control, I have disabled password logins (public key only), but still need to enter my password to access sudo. This is becoming cumbersome, as I use a long, automatically generated ...
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1answer
1k views

CentOS - Local privilege escalation - CVE-2012-0056

I have a server with these properties : cat /etc/lsb-release ...
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2answers
3k views

Need advice on linux server being hacked

I'm currently trying to find out how one of our centos servers was compromised. We were experiencing malware on our sites. After searching I finally found the malware injecting into the sites. As it ...
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2answers
154 views

Security implications of storing email attachments on Centos Server

There is an application I am working on which requires processing the incoming mails to cs@company.com. The company.com mail accounts are being run via Google Apps for Business. So I fetch the ...
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1answer
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Retrieving saved password from Firefox on Linux [closed]

I know there are ways to get the cookies from browsers in Windows and retrieve and decrypt saved passwords from them. Is there a similar way to do so on CentOS?
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WHM server hacked, lost root access [closed]

I have a huge problem. In a nut shell, 2 days ago I noted a strange process going on with httpd, something I never saw before. That then led to me googling it, and OVH came up top with "Examples of a ...
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2answers
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How to hack linux via Local File Inclusion vulnerability?

During my penetration testing, I found a local file inclusion vulnerability. In fact this vulnerability existed in mailwatch <= 1.0.4, and its exploit existed in Exploit-DB. I tried to exploit the ...
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3answers
3k views

Is CentOS a good choice from a security perspective?

How secure is the CentOS Linux distribution? I noticed there were times when there were no up-to-date patches for some version of CentOS (e.g., 5.6). I read this on some mailing list that I can't ...