Computer memory refers to a physical device that is used to store sequences of instructions (programs) or data (program state information) on a temporary or permanent basis for use in a computer.

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Can I Prevent Internet Explorer from Storing Login Requests in Memory?

Using Internet Explorer 11 I have been able to login to HTTPS web applications by providing a username and password and then subsequently logout. Whilst the browser process is running I can then dump ...
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6answers
8k views

Can RAM retain data after removal?

Is it possible for RAM to retain any data after power is removed? I don't mean within a few minutes such as cold boot Attacks but rather 24 hours plus. Working with classified systems the policy ...
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Memory Forensics dumping the memory contents of a running PID [closed]

There was an old security tool called PMdump that could dump memory contents of a running PID without disturbing those contents, which is useful for analyzing suspicious processes. However this tools ...
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1answer
109 views

Is it possible for a virus to be redistributed through RAM?

I have a new, formatted, and up-to-date laptop. It's clean of any infections and I'm sure of it. The only change I've made is that I added a new 4G DDR3 RAM stick from my old laptop, and my new one ...
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0answers
31 views

What are the differences between paging and segmentation in terms of security?

How do the two techniques differ when it comes to keeping data in memory safe? Which one is safer if one can ask that question. What is meant when it is said that segmentation provides separate ...
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2answers
7k views

How to make / dump contents of memory for forensics analysis?

I work as a Information Security analyst and was recently tasked to look into Incident response + computer forensics related topics. For starters, I am experimenting on my PC which is running Windows ...
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1answer
639 views

What does EMET do for Windows 8.1?

I recall seeing, upon release of Windows 8 a while ago that a number of new mitigations and memory protections had been put in place but i'm unsure if these are the same protections offered by EMET. ...
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2answers
113 views

RAM Encryption. Is it possible? [duplicate]

Without adding any additional hardware, is RAM encryption possible? If so are there any known and currently used implementations for Linux or Windows systems? And if this is something that is possible ...
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3answers
160 views

How to mitigate heartbleed like attacks prior to zero day

Whenever sensitive data such as a password is used on a server it resides in memory for a short time. Given that security flaws like heartbleed exist which have the ability to 'bleed' memory for their ...
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1answer
128 views

How long would a computer have to be off to be resistant to a cold boot attack?

I understand that the longer a computer is off, the more resistant it is to a cold boot attack. I also understand that an AES key can be reconstructed from a redundant round key schedule even after a ...
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5answers
4k views

environment variable accessibility in Linux

Perhaps this is a trivial question, but how accessible are environment variables in Linux between different users? e.g. if Alice executes export FAVORITE_FOOD=`cat /home/alice/fav_food.txt` Can ...
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0answers
187 views

Do I need to use the cipher command with a newer SSD to erase files?

I've used Eraser in the past, and recently became aware of the cipher command in Windows 8. Specifically, with the /w flag: /w removes data from portions of the volume it can access and have not ...
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1answer
78 views

Create memory dump from the windows commandline

I was following this blog post to dump the memory of a windows host. Sadly this method does not work on Windows Server 2012 because the memory drivers that come with mdd aren't signed and this is ...
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1answer
987 views

mprotect at kernel level

What would happen if a kernel-level process sets some of its memory pages as PROT_NONE with mprotect and another kernel-level process tries to read one of these protected pages? What is the ...
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3answers
8k views

Memory dumping Android

I need to evaluate the security of a cryptographic library. In particular I am targeting a part of the library where I believe the private key is exposed for a limited time in the RAM. Any ideas or ...
4
votes
1answer
115 views

Convert raw memory dump into a format recognized by volatility

I dumped the RAM of a Windows 7 pc using LiveKd which basicly worked. The memory was dumped but then the convert of the binary dump into "summary format" failed. When I then tried to read the file ...
3
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1answer
113 views

Memory Mapped Files and AV

Do you know if AVs scans non-persistent memory mapped file content in a Windows Environment ? (Or have the answers for some of the AV on the market) I would prefer, if possible, some real world ...
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0answers
35 views

Address of environment variable different for each directory

I'm writing a return-to-libc attack for a school project. My script retrieves the system(), exit() and shell addresses as follows (it's a sh script that calls some c programs): Create the environment ...
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0answers
210 views

iPhone 5/6 RAM security

I'm interested in how the RAM can be exploited in iPhone 5+, iOS 8+. I've previously discussed general iPhone encryption and from the response it reads: There are many exploits over the years ...
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4answers
119 views

Simple tools for searching process memory for MSSQL connection strings

I'm working with a piece of software that handles all permissions in a Windows client binary on the user's computer. The software connects to a backend database using the sa account. The sa password ...
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4answers
6k views

Old OS memory space protection - was it really that bad?

In his book Security Engineering, Anderson really focuses on how in the 90s and early 2000s programs would need to access memory that wasn't their own, and programmers programmed with the assumption ...
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1answer
131 views

How do programs like keepass protect their data even when it's loaded into RAM?

After noticing the feature in Keeppass having the option to "Enable in memory protection" I began wondering, how can memory be encrypted and still be useful? Without going into homomorphic ...
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1answer
83 views

Volatility Plugins Directory Using Windows

I'm trying to use a plugin (not built-in) with volatility 2.4 but am having trouble with the syntax. I know that at least for the native python (vol.py) the plugins option must be specified directly ...
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2answers
81 views

Prevent Plain-Text Passwords Output by a Script From Being Accessible in the Future

Let's say I have a Bash script that generates a password, creates a new user with that password, and then tells me what the password is: # Generate a password and set it to $PASSWORD PASSWORD=$(tr ...
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1answer
275 views

Are encryption keys wiped from RAM before hibernate, or how to do it (Luks and Truecrypt)

Using Linux, I have system and swap/hibernation partitions encrypted with LUKS, and data partitions encrypted with Truecrypt, and I am wondering when I put my laptop to hibernation if the encryption ...
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3answers
224 views

What is risk of having memcache in public interface?

To what extent a hacker can potentially cause harm to a server? Can you please give few examples? Recently, there was a data breach in my website and I found out this interface was public-facing and ...
2
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1answer
81 views

Selling used ram [DDr3 SODIMM]. Need to erase?

Does DDr3 SODIMM memory hold information after being removed? I would like to sell the memory I just removed from my computer, however I wasn't sure if I had to wipe/erase it first some how. Please ...
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1answer
70 views

Defeating ROP attacks in x86

Most defense techniques against ROP revolves around randomization, such as ASLR. If I mark all regions of memory, other than the code segment, non-executable, will this defeat ROP?
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1answer
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Are there any architectures currently out there that use hardware-enforced process isolation? What would it take to add that to x86?

First-time asker/commenter, long-time reader. As someone who's currently doing a lot of thinking & writing about measures that might foundationally improve computer security (ie., involving not ...
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0answers
24 views

How to disable typed arrays in firefox as rowhammer mitigation

I am concerned about the potential attack surface exposed by JavaScript typed arrays as a means of performing rowhammer attacks. Is it possible to disable (via official means or otherwise) typed ...
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2answers
4k views

Protect access to an SD card

How can I protect access to an SD card, so that only authorized users can read or modify the content of the SD card. Currently everybody who has physical access to the SD card can read or modify ...
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2answers
249 views

How to know whether a RAM module is vulnerable to rowhammer before buying?

I'd like to know (or at least perform some reasonable guess) if a RAM is vulnerable to rowhammer attack. I haven't found any list of vulnerable or secure RAM modules. I've seen some general rules ...
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2answers
4k views

Safely disable firewire/thunderbolt, patching up DMA exposure

I understand that Firewire 400/800 and Thunderbolt have DMA enabled, and a malicious hardware device can easily read and manipulate system memory at will. If I disable the software drivers for these ...
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2answers
149 views

Do password managers leak information with swap memory?

The post How to find passwords in memory (password managers) concluded, that passwords are visible in plaintext if you login to a website. Password managers tend to store the passwords encrypted in ...
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1answer
123 views

Is it safe to reuse a tab in a browser for different websites?

A friend of mine recently asserted that it is unsafe to reuse the same tab in a browser for different websites. In other words, if the user: Visits a sensitive website (for example logs in his bank ...
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3answers
3k views

Why is it dangerous when an attacker can control the `n` parameter to `memcpy()`?

I was reading a paper and saw this piece of code has an information leakage vulnerability. It was saying the following code will Leak memory layout information to the attackers Could somebody please ...
5
votes
1answer
531 views

Does Linux kernel use DEP for kernel memory?

Does the Linux kernel use DEP internally for its kernel memory? In other words, does the Linux kernel take care to ensure that, when the kernel is executing (in kernel mode), every executable ...
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2answers
127 views

Possible way to extract sudo password from running system via the clipboard

I use to copy and paste my sudo password from a KeePass file so I guess the plain text user password will be saved in RAM at some point when I use it, for example, to accept an update. Is that right? ...
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4answers
8k views

Recover the prior contents of RAM from a turned-off PC?

I've heard that if your PC is turned off, then an attacker can recover the RAM from the last session. I find this hard to believe. How could it be done?
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1answer
259 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".
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1answer
162 views

How does Memory Corruption apply to Android?

I have researched several DoS attacks within Android e.g.: CVE-2015-1474 CVE-2013-5933 CVE-2013-4710 CVE-2012-6301 etc. And although I found DoS attacks within Android difficult to understand at ...
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2answers
283 views

Can server administrator dump memory remotely thru Dell iDrac card?

I might at some point to invite another person into my software project. I don't mind sharing the code but the data I use is very sensitive. Once he gets hands on both pieces I wont see him again (if ...
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2answers
114 views

How hard would it be to scramble crypto keys in memory on command?

I'm looking for a way locate a set of keys in memory on command. Use case would be cold boot attack prevention: a trigger on rack open, scramble the keys in memory followed by shutdown in full disk ...
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0answers
126 views

Was TRESOR integrated in the Linux kernel?

If a computer is switched off, the data can stay in RAM memory for a while; decaying over about 5 minutes. This can be made longer by cooling the chips: ...
0
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1answer
263 views

Moving /tmp to an encrypted tmpfs

BLUF: I'm using an SSD on my system, so my primary reason to use tmpfs to increase the life of my drive by moving high read/write files to volatile memory. But from a security point of view, I'd also ...
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2answers
614 views

Why are buffer overflows executed in the direction they are?

I'm following The Security Tube’s video here. He overviews buffer overflows, and mentions how memory is executed from highest to lowest in the stack (at least with his implementation I assume). So we ...
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1answer
45 views

Security of applications on .net platform

On .net we use SecureString class to keep our applications variables in memory, safely. Microsoft says: Represents text that should be kept confidential. The text is encrypted for privacy when ...
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3answers
85 views

Variable scope and security

This question is directed at the .Net framework, but would hopefully be answered to encompass many languages & frameworks. Let's assume I have a two methods, one which actually decypts data and ...
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0answers
45 views

VSFTPD- memory attacks [closed]

How are memory attacks prevented via the VSFTPD server? The platform I am using is Ubuntu. Please I am not currently having a problem I am just requesting knowledge concerning the subject stated ...
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1answer
265 views

Is it unwise to use Redis to store PII, private keys, and other secrets?

I'm reviewing a system that is using Redis to store all client secrets, private keys, and other things. The problem is that Redis loads the entire DB into RAM Since SSL's heartbleed, Rowhammer, and ...