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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Is this integer overflow vulnerability exploitable?

Is this integer overflow exploitable and if the answer is yes, how can i exploit it? char buffer[20]; int len = atoi(argv[1]); if(len < 20) memcpy(buffer,argv[2],len); If I set len to -1 the ...
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1answer
44 views

Is rootkit detection by comparison of file, process and connection lists a good practice?

I'm currently reading the Blue Team Handbook and one of the recommended methods to detect rootkits is to compare technical data obtained from various sources. As I understood it this is practiced like ...
2
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0answers
12 views

Tools or techniques to perform live memory capture of Solaris

So far I'm hitting a brick wall here. Trying to capture memory from a Solaris 11 machine and nothing seems to work. I've tried compiling and using LiME, to no avail I've tried memdump, gives me ...
3
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0answers
32 views

Does Oracle's GuardedString protect sensitive data against heap or memory dumps?

Oracle's org.identityconnectors.common.security.GuardedString states this in its documentation: The GuardedString class alleviates [the problem that string data is kept in memory as clear text] by ...
3
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0answers
66 views

security of libgcrypt when cross-compiling for windows?

Looking at libgcrypt, specifically secmem.c it seems that it does not account for windows-specific memory handling (e.g. VirtualLock) and in fact there is a very troubling comment: #elif defined (...
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1answer
49 views

Grabbing ChaCha20 key from ram

There are various other posts which talk about grabbing a key from ram such as http://electronics.stackexchange.com/questions/198274/storing-a-secure-key-in-an-embedded-devices-memory How would you ...
5
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1answer
60 views

Ring 1 and Ring 2 Memory Protection Architecture

I have heard that Ring 1 and Ring 2 memory protections are basically no-longer used within modern systems. However, when I checked into things, all I found was that these rings are somehow associated ...
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2answers
70 views

Password storage in 1password and other similar password storing applications

My understanding of memory in a computer is that it is stored in blocks that are over written only when the computer finds it convenient. so if a program asks to write in a certain block rather than ...
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1answer
32 views

Attacking encrypted storage vs attacking memory [duplicate]

I want to create a generative password manager. Generative password managers generate passwords based on seeds such as the master password and the website's URL. In contrast, most password managers ...
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0answers
14 views

Dynamic memory management i386 vs amd64

I've spotted some differences in the behavior of the GNU/Linux dynamic memory allocator in i386 vs amd64. While it's possible that I'm misunderstanding something ( in this case let me know ), I don't ...
2
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1answer
174 views

How can Windows 10 not have the password in memory?

I have read that Windows 10 does not hold the password in memory from the creator of mimikatz: Starting with 8.x and 10, by default, there is no password in memory. Exceptions: When ...
5
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1answer
58 views

Are Heap addresses randomized by ASLR?

I have been reading this article about an Internet Explorer exploit and I am a little confused about why the memory addresses effected by the heap-spray "work". The paper states that the attack uses ...
5
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1answer
82 views

Is rowhammer comparable to faults caused by radiation?

As far as I know, both rowhammer and radiation based fault injection, can cause arbitrary bit flips in the memory. Are there any differences in matters of possible outcomes of both "attacks" on ...
4
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1answer
70 views

Why use a passphrase for RSA key?

Today I generated my first key pair, so my knowledge here is - so to speak - very limited. On client side I am using Windows and to log in I use PuTTY and I used PuTTYGen to create the keys. Here (...
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5answers
164 views

Can secrets be made safe in memory?

Say, I am running an application on a cloud server such as AWS. Suppose I supply a key at run-time (so its not stored anywhere alongside/inside code), is there a way to secure this key in memory? So ...
2
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1answer
75 views

Is there a security risk in using pointers instead of struct instances?

Recently during a code review, a senior developer asked me to replace a pointer with structure instance in a utility method. He asked me to do so for security purpose. One reason that I could think of ...
2
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3answers
74 views

Is it safe to include memory addresses in a program’s output?

I’m writing a program. The input is a complex data structure in memory. The output is an HTML report that contains: (1) a representation of the structure; (2) textual annotations that refer to objects ...
2
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0answers
296 views

How can I protect my home/office computer against row hammer?

Row hammer seems to affect ECC memory less, but ECC is still not immune. I have heard of software mitigations like ANVIL, but that doesn't seem to be 100% row-hammer-proof either. What software or ...
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3answers
62 views

What is the future of exploitations? [closed]

With the advent of "Safe" languages like Rust, the prevalence of Software Correctness, and improved type checking in existing systems, memory based exploits are very hard if not possible at all, to ...
7
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1answer
140 views

Methods of cold boot attacks in the wild

As far as I know, there are two methods for performing cold boot attacks: Reboot the system into an alternate operating system or BIOS with a minimal memory footprint which automatically exports ...
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2answers
111 views

encrypting data while in memory

What is the best way to protect sensitive text input and store it in memory until form submission is complete and then clear it out shortly thereafter? I'm looking to protect sensitive information ...
-1
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1answer
72 views

Tool for reading application data before it's encrypted [closed]

For a test, I have a simple client-server Python socket-based application with a self-signed certificate. The code is copied from here. Although I don't see the traffic as TLS in Wireshark (why?), ...
4
votes
2answers
92 views

How do self-contained executable program exploits work, when considering virtual memory?

My understanding of virtual memory is that the operating system allows each process to have access to the entire pool of memory, and creates this illusion by paging. As a consequence, a program can ...
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1answer
42 views

Are there attacks to steal database records from memory in cloud?

Imagine a hosted database in public cloud. The database records are encrypted only on disk (data-at-rest). Are there are any attacks that steal the database records from the memory (when queries are ...
8
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1answer
426 views

Is exposing website performance data a security risk?

I am currently adding a subsite to some websites that allows me to monitor performance data live as the server software perceives it. The data is mostly stuff like amount of memory used, memory ...
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0answers
40 views

Is there value in turning off computer to erase memory? [duplicate]

I still use TrueCrypt, but I was thinking about using VeraCrypt. I noticed on the Wikipedia page for VeraCrypt that the key is stored in the memory. Because of this, I have a general question. To ...
2
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2answers
53 views

iphone, Electron Microscope can see the ROM cell states

Just one bit gets toggled when the passcode is correct. Why not just toggle that one charged/discharged cell? Determine that bit through experimentation with an electron microscope.
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3answers
354 views

Can someone read a iOS class variable from outside the app?

a class variable like this: @property (strong, nonatomic) NSString *privateValue; Can someone read the value of that variable while it´s in memory? I can´t find anything about this on the apple ...
3
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1answer
107 views

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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0answers
40 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 ...
2
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1answer
185 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 ...
3
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2answers
150 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 ...
8
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1answer
164 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 ...
4
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1answer
152 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 ...
3
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0answers
44 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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4answers
7k 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 ...
3
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4answers
259 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 ...
9
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1answer
2k 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 ...
2
votes
1answer
171 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 ...
5
votes
3answers
170 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 ...
4
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1answer
616 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 ...
2
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2answers
118 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
395 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 ...
2
votes
1answer
112 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 ...
3
votes
1answer
100 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?
10
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1answer
227 views

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 ...
54
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6answers
11k 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 ...
3
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0answers
38 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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1answer
499 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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1answer
145 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 ...