Questions tagged [kernel]

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10
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1answer
5k views

What is real-world impact of CVE-2016-0728 (Linux Kernel Vulnerability)

Today emerged report about another serious vulnerability in opensource world, CVE-2016-0728. It is local privilege escalation in Linux kernel 3.8+. What are the the possible real-world exploitation, ...
-1
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1answer
101 views

Host Based IDS with syscall monitoring

Hey Guys I am a newbie in security stuff and now I am working on my final project about host based IDS. I have some questions to you guys Can a rootkit be classified as an intrusion or is it a ...
-1
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1answer
315 views

Starting a server without SElinux or Apparmor [duplicate]

The Debian kernel that compiled for Beaglebone Black, doesn't support SElinux and Apparmor, AFAIK. I just want to know, is it safe to put a server on the internet without SElinux or Apparmor? However ...
2
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1answer
726 views

Effectiveness of Secure Boot on kernel-mode rootkit detection

With so many new patches and updates, how effect is Secure Boot on detecting kernel-mode rootkits?
26
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4answers
3k views

How Do Rootkits & Other Low-Level Malware Still Manage to Load on Systems Protected by Secure Boot (and TB/MB)?

Let me try asking my question this way... Let's say that I'm a offensive cyber Bad Guy working for a foreign state-sponsored Advanced Persistent Threat unit. My unit is charged with, say, stealing ...
4
votes
1answer
766 views

Security research on Operating system security measures, where to start?

I am researching on operating system security, And I don't know where to look for more information on this. I could find the following sources, but I need more guidance. Sources: Microkernel ...
1
vote
1answer
962 views

How is a exploit code mmaped in user space executed in kernel space?

I am reading about a Ubuntu-12.10 security exploit CVE-2013-1763 which describes the vulnerability of stack buffer overflow that can be exploited to escalate privilege of a process and gain root ...
3
votes
1answer
627 views

Is the 'SUIDGuard' patch safe to implement?

Can someone who really knows what they're looking at advise whether the patch published here by Stefan Esser is in fact safe to install? While I'm very concerned that Apple haven't published an ...
1
vote
0answers
653 views

Did DKOM trigger PatchGuard on x64 Windows?

DKOM can be used to hide processes and drivers. It works well on x86 system. However, there are PatchGuard on x64 system. Can PatchGuard detect DKOM?
2
votes
1answer
3k views

How secure is QEMU/KVM? [closed]

I'm worrying about the security of the VM host machine (against guests) as the Kernel-Based Vitrual Machine operates at kernel level. UPDATE: Is there any guarantee that a guest can't manipulate/...
13
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2answers
848 views

concrete real-life examples where grsecurity prevented an exploit

From theoretical point of view, grsecurity kernel patch looks like a great hardening tool. Most importantly, PaX seems like a good idea. Do these theoretical advantages have indeed practical effect ...
2
votes
1answer
2k views

kernel: Intrusion IN=ppp0 on my Fairpoint assigned router from IP in China

I'm getting these user alerts: kernel: Intrusion -> IN=ppp0 OUT= MAC= SRC=115.230.125.147 DST=xx.xxx.xxx.xxx LEN=40 TOS=0x08 PREC=0x20 TTL=107 ID=256 PROTO=TCP SPT=64316 DPT=9064 WINDOW=15500 RES=...
1
vote
1answer
134 views

How do you determine if an open source script contains malicious code?

I am trying to analyze an open source auditing tool to determine if it makes unnecessary and potentially harmful changes to the system. I am interested in determining if the script calls any binaries ...
0
votes
1answer
70 views

Is all access to the underlying system components protected via an access control mechanism managed by the kernel?

I'm assuming it is possible for an attacker to bypass the Linux kernel to make changes to system memory, hard drives etc.
6
votes
1answer
3k views

Can a kernel exploit compromise an OpenVZ host?

As OpenVZ runs on a lot of virtual servers, I would like to know how kernel exploits would affect the whole system. Would it be possible to break out of an OpenVZ container (virtuozzo, etc) with a ...

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