Questions tagged [vulnerability]

A weakness or flaw in computer software and hardware which allows an attacker to take advantage of (exploit) a targeted system.

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TCP Sack panic proof of concept?

For the vulnerability called TCP SACK panic([1], [2], [3], and many more): is there a proof of concept code out there that can be used to test vulnerability status and effectiveness of remedies? [1] ...
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Is there an easy way to dissect .NET Remoting traffic for reverse engineering?

I'm working on a vulnerability within an application that uses .NET Remoting. I can see from the code that there are a number of potential ways to get RCE, but due to how the application performs its ...
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189 views

Cortana password bypass CVE-2018-8140

Recently a vulnerability in Microsoft's Cortana (CVE2018-8140) has been patched. Mcafee made a blog post about it explaining some background information. There is also a video showing a Proof of ...
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1answer
144 views

Exploit user input being directly inserted into PDF

I'm testing a web application where user input is directly inserted into a PDF file which can then be downloaded. The user input is accepted as is, without encoding or any other modification. This ...
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1answer
3k views

How to use a sh SUID script to get privilege escalation?

As www-data user (non-privileged user) I have found this SUID, world-writable shell script: www-data@Cisco:/home/cripto$ ls -al /etc/init.d/admin -rwsr-xrwx 1 root bob 233 Nov 12 13:09 /etc/init.d/...
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1answer
193 views

How to notify Adobe about a software issue

Recently, I stumbled upon a way to reset the software trial of any product under the adobe suite. It's as simple as changing some attributes within a few files. I'm assuming that it can be deemed an ...
3
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1answer
90 views

Sensitive information rendered into inline static javascript object vulnerability if user saves HTML page

I am using a javascript rendering template engine with node.js. I am rendering sensitive user information into a static javascript object which is then served to the client. However I realized if the ...
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110 views

What are the security implications of RAMBleed?

The RAMBleed vulnerability uses Rowhammer induced bitflips to derive contents of memory that it should not have access to. This works with ECC RAM too. It is definitely scary. Is this vulnerability ...
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67 views

String Format Exploit x64 compiled with -Wformat-security -D_FORTIFY_SOURCE=2 on

I found a daemon running as uid 0 that has a string format vulnerability. It is compiled with -Wformat-security and -D_FORTIFY_SOURCE=2 on. I'm trying to write an exploit for it, but what I get is: ...
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59 views

How is CVE-2016-6787 a UAF bug in Linux kernel?

From the explanation video of the Linux kernel vulnerability CVE-2016-6787, I don't understand is though put_ctx isn't inside a mutex, there's an atomic_dec_and_test inside put_ctx at the very ...
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329 views

Testing a padding oracle vulnerability with PadBuster

I scanned my server with nikto and it shows me that its vulnerable to padding oracle vulnerability + OSVDB-68127: Server is vulnerable to http://www.microsoft.com/technet/security/bulletin/MS10-070....
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124 views

How to extract the information about the stack or EIP/RIP registers from the ASAN (sanitizer) crash output?

I am testing Netwide Assembler(NASM) and verifying the latest bug [CVE-2018-10254] Stack-buffer-overflow (out of bound read). I am trying to overwrite the EIP/RIP and make it crash but I don't know ...
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Security issue found in login system no resolved. Next Step?

Approximately 8 months ago I found and reported a serious security issue surrounding a website I use. This website holds confidential and protected personally identifiable information. I called the ...
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229 views

How does biometric authentication work from a technical perspective?

Together with a colleague, we discussed the way of biometric authentication and how this works out. Both of us are only interested in security but far from being an expert on the technical side. ...
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91 views

Apple iOS and KRACK

KRACK consist of several vulnerabilities (https://www.kb.cert.org/vuls/id/228519). Apple released patches against CVE-2017-13077, CVE-2017-13078 and CVE-2017-13080 from what I could find in their ...
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331 views

Prevent Firefox or Chrome from evaluating URLs before page request?

If you browse to this page: http://192.168.10.8/../../../../../windows/win.ini Firefox/Chrome will evaluate the URL first. The resulting page requested will be: http://192.168.10.8/windows/win.ini ...
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1answer
373 views

Can the client communicate with the AP after a KRACK attack?

When a client is forced to reinstall the key and to reset the nonce and the replay counter, what does it imply for the future communication between the client and the AP? There's a adversary in the ...
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170 views

Exploitability of Heap Vulnerabilities

I'm researching memory safety vulnerabilities and noticed that in non-browser applications (for example the Linux kernel) the CVE details entries for use-after-free vulnerabilities almost always list ...
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259 views

Clarification on DH groups

Nikto reports the following via the "ssl-dh-params" NSE script: Check results: | WEAK DH GROUP 1 | Cipher Suite: TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 | Modulus Type: Safe ...
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151 views

Was the OSX/iOS Airdrop flaw real?

One exploit has caught my eye, mainly due to the possibility of malware incorporating it infecting businesses and schools. This exploit is, as you may have guessed from the title, the OSX/iOS Airdrop ...
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1answer
650 views

Can clients visit my site, and spam socket.emit(something); to my server, or is there some security behind socket.io?

I'm using Socket.IO and the client side looks like this. <script src="/socket.io/socket.io.js"></script> <script> var socket = io(); socket.emit("sendData", "hello!"); </...
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1answer
145 views

Benefits of placing WAF reverse proxy/transparent in front of web-based honeypots?

For my final year project, I wanted to do a comparative analysis of 2 WAF's ModSec/Shadow Daemon and web-based honeypot SNARE/TANNER. I wanted to find out if there are any benefits of placing WAF ...
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44 views

How can this Authentication/Authorization flow be improved?

I am currently building a full stack web app mainly as part of an exercice. This app is made up of a back end on a server (written in Go), and a front end written in Angular (so on a user's browser). ...
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2answers
274 views

Jenkins malicious process identification

I have a Jenkins (v2.120) machine hosted on AWS which has what looks like a malicious process: process has large CPU usage killing it, respawns it (with same name) restarting machine spawns it (with ...
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98 views

Metasploit wmap_run -e freezes on auxiliary/scanner/http/brute_dirs module, returns 404

I am trying to run a wmap scan on a web app locally on my Mac. But when wmap reached File/Dir testing, more specifically the brute force module, it does not show anything for path (even though the ...
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18 views

Vocabulary matters: link between faults and weaknesses

I am trying to make the link between faults and weaknesses (As defined by Common Weaknesses Enumeration, a MITRE project). The word "fault" is generally used in the reliability domain, to designate ...
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52 views

Advice for carrying out risk identification in ISO27005:2011

I am currently required to carry out an information security risk assessment for an assignment, using the ISO 27005:2011 standard, for the Equifax data breach that occurred in 2017, https://...
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142 views

Is there any modern scalable way to do system call monitoring?

I wrote a kernel module to replace the Linux kernel service routines (e.g. system calls) with security-enforcing code, similar to SELinux or AppArmor, with the main exceptions of ruleset control on-...
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103 views

Windows Possible Vectors for Privilege Escalation From “Weak” Folder ACLs

I am doing a security analysis and I am trying to figure out what the possible attack vectors and possibility of privilege escalation's are of the way this program is setup? I used Attack Surface ...
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46 views

A database query error in Wikimedia 1.27.4

I have a website running Wikimedia 1.27.4 , When I insert (--) symbol in search box I get this error message A database query error has occurred. This may indicate a bug in the software. I got some ...
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1answer
1k views

Dealing with NULL byte (0x00) in offsets

I'm trying to exploit a strcpy() buffer overflow vulnerability to test ROP attack. I found a very useful gadget at address 0x0000f26c so I am obliged to insert null bytes to the stack to override the ...
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1answer
812 views

Side channel attack with flush+reload

I have been reading about cache side channel attacks and the "Flush+Reload" method came up a decent amount. Before putting forth my question, this is what I understand about the Flush+reload technique....
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1answer
193 views

How the attacking vector of Skygofree is composed?

Regarding recently emerging Skygofree trojan for mobile devices, having read the following article Secure list / Skygofree summary it is still unclear to me how the device is getting affected with ...
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128 views

Quantifying security with metrics

I am working on a state-of-the-art quantification of security, meaning a numerical assessment of security for a system. In my research, most of the work is not recent (up to 2012 so far) and is ...
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69 views

IBM Appscan vs Flaw finder

What is the main difference between an open source tool like flaw finder and a costly commercial tool like IBM Appscan. One is reporting that we get a presentable report with commericial tools but is ...
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182 views

Security risks introduced when moving from a three tier to a two tier architecture

I host several .net web applications using a standard three tier architecture with web servers located in a demilitarised zone. I have been asked to host a two tier .net web application where the web ...
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386 views

/var/www/cgi-bin/webcm vulnerability

I opened my apache error logs today and found this: [Fri Apr 28 06:52:59.219655 2017] [cgi:error] [pid 25030] [client 172.30.0.155:12810] script not found or unable to stat: /var/www/cgi-bin/webcm I ...
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How can I study/replicate multiple vulnerability types in a specific software?

I'm interested in studying the effects (crashes, signals sent, logs, etc.) of different types of exploited vulnerabilities (DoS, ROP, remote shells, etc.) in specific software (particularly webservers ...
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Protection against remote system compromise on binary code level

My (certainly incomplete) understanding of a remote system compromise on the binary code level is roughly: A program vulnerability, such as missing input validation, is exploited to insert external ...
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223 views

Countermeasure for privilege escalation for TeamPass

I busy with an exploitation process of TeamPass web application and I have identified multiple different countermeasures that could potentially be used or combined together for solving the horizontal ...
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101 views

Finding Vuln in linux login console

I'm trying to find vulnerability on an appliance based on Ubuntu 12.0.4 and this is about console (COM port) section now. my findings: The password field is sensitive to large string. for example if ...
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158 views

Internet Explorer WScript Shell Enabled

While testing a company's systems security, I found out that they have allowed WScript.Shell to run in all of their Internet Explorer for Intranet websites. It works if you open HTML files in your IE ...
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191 views

How to craft Invalid packet to test for TLS Poodle vulnerability?

I need to test if a server is vulnerable to TLS Poodle. To do this I need to send an invalid packet to the server and check if it closes the connection. But I am not sure how I create that packet (...
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644 views

Vulnerabilities in Scala web applications

I want to create a server side web application using Scala. Are there any classes of web vulnerabilities that are unique to Scala? I tried to search on the web for Scala-specific vulnerabilities, ...
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176 views

Address of DLL changes in Win XP SP3: CoreLan Exploit writing Tutorial part 1

I was following the CoreLan Exploit writing Tutorial Part 1. OS used: Windows XP SP3 I tried to use “C:\Program Files\Easy RM to MP3 Converter\MSRMCcodec02.dll” for the instruction “jmp esp” [ff e4] ...
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286 views

Android app downgrading TLS protocol to SSL 3.0

I performed vulnerability testing of some Android mobile applications I helped develop and I noticed some odd behavior. The applications used the default Android 5.0.2 cipher suite list that includes ...
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350 views

Windows OLE Vulnerability CVE-2014-4114 “Sandworm”

Just heard about a new vulnerability and am using the same format as the POODLE guy for this one. What is the Sandworm vulnerability? I use [product/browser]. Am I affected? Is [product] vulnerable ...
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154 views

Struts2 + action prefix vulnerability + CVE-2013-4310

CVE-2013-4310 indicates the action prefix (action:) feature of struts2 framework is vulnerable. Hence the vendor released the patch(?) by disabling this feature. However, there is an option to enable ...
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40 views

Windows RDS vulnerability

Further to windows thuesday patches and the 4 criticals vulnerabilities related to RDS, i want to know if i'm exposed to the risk or not. I don't have port 3389 exposed to internet, and i read in in ...
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Generating a valid payload for RichFaces 3.X

I am currently running on a virtual machine JBoss 5.1.0GA + RichFaces 3.X + photoalbum demo which makes me vulnerable (only accessible from my LAN) to CVE-2018-14667. I have tested the payload ...