What to know for your first infosec interview – 【126kr】

XSS is a client side attack. What this means is that an attacker is able to place malicious code on a website and when a user visits that web page, their web browser runs the code locally. Data recovery wd passport Typically, this is JavaScript but it can be any client side language.

So what can an attacker do with a XSS vulnerability? There are a number of things that can be done.

Relational database management system The most common is stealing cookies or other session information.

For example, you log into your favorite shopping site. Database generator The site issues your web browser a cookie which is your unique identifier. Database 3nf example If an attacker is able to place malicious code on any site you browse to, he can grab your cookie, which allows him to access your favorite shopping site as you.

Storedis basic, it means that the malicious code is stored on the web server. Data recovery hard drive software It can be stored in a comment field, in a database or wherever else you can place your code on the website. Iphone 4 data recovery Reflected is a bit more convoluted. Database logo This requires a victim to access a malicious resource such as a website which then sends a message to the vulnerable web server, which then reflects its response to the victim.

One thing to keep in mind is that if the user is running a web browser that has code execution vulnerabilities, you may be able to execute code on the victims device via an XSS attack.

So how do we fix these types of vulnerabilities? While it completely depends on the circumstances there some common ways to prevent many XSS vulnerabilities. Moto g data recovery Escaping any character that can affect your web app. Database analyst salary Depending on the language you are using, there are typically plugins or functions for this. Data recovery engineer Validate all user data , if it is expecting a phone number, make sure your web app only accepts a phone number. Gt m database Escape all data outputted to the user. In databases information is organized in The other proven method of preventing the damage of a XSS attack is secure cookies and content-security-policy headers . Data recovery tools iphone These force SSL/TLS on the cookies and enforce the HTTP response behavior.

Two notable XSS attacks were TweetDeck and Samy. A database driver is software that lets the Both of these were not particularly dangerous but they did represent the vast effect that these types of vulnerabilities are capable of.

CSRF is another client side attack. 7 data recovery suite key This attack requires an attacker to have some knowledge of the web application as well as who their target is. Data recovery linux CSRF is basically a way for an attacker to force you to execute an action by sending you a link.

For example, the victim gets an email at work while logged into an internal web app that controls access to a VPN portal. Database modeling tools The victim clicks on the link which actually points towards that internal web app which adds a new user to the VPN portal. G info database search As you can see, this could be catastrophic to an organization if executed correctly.

There are two main types of CSRF attacks. Database administrator salary One is used for the example above, it requires some social engineering in order to trick the user into clicking the link. Database triggers The other type is Stored . Data recovery recuva Stored CSRF takes place when the CSRF link is stored on the web server itself. Data recovery texas This can also be executed in part with a XSS vulnerability which would in turn would target a wide amount of users.

So how do we fix these types of vulnerabilities? Most web frameworks have built in methods to guard against CSRF vulnerabilities. Database resume Other ways include checking the referrer header to verify it matches the target origin, checking the origin header to verify it matches the target origin and CSRF tokens . Data recovery external hard drive mac CSRF tokens are unique to each session and are generated at random for each session. Database management systems If the request does not pass the verification, the request fails.

In 2008, uTorrent had a CSRF vulnerability that definitely warrants a read if you want to get a better understanding of CSRF attacks. 7 data recovery review Check it out here.

In symmetric encryption , both communicating parties will need a copy of the same key to decrypt and encrypt data. Mode s database In an asymmetric encryption (Public/Private key) , both parties will need each others public key. Windows 8 data recovery An encrypted message which is encrypted with a public key, can only be encrypted with each users private key which is kept hidden.

Encryption Algorithmsare simply algorithms that scramble data based on some complicated math by using a key. Java 8 database Some of the common ones are Triple DES, RSA, Blowfish, AES. Database tools I would assume that unless you will be working on projects directly related to an organizations PKI (Public Key Infrastructure), you won’t be expected to have a deep understanding of these beyond knowing which of the common ones are symmetric or asymmetric. Drupal 7 database api Some symmetric algorithms are AES, DES and 3DES. Raid 6 data recovery The most common asymmetric algorithm is RSA.

Key Exchangeis the method in which an encrypted communication channel is established. Database architecture A common key exchange protocol is Diffie-Hellman . Iphone 4 data recovery software The problem with this initial key exchange is that before the two parties exchange keys, they cannot communicate securely. Database java This introduces the problem of a Man-In-The-Middle attack. Data recovery android Luckily, there is a way to assist with that issue by using Digital Signatures . C database tutorial This is where your SSL certificates come into play. Data recovery services cost SSL certs are issued by a Certificate Authority such as VeriSign. Data recovery professional Another common to verify a parties identity is the use of PGP , or pretty good privacy. Data recovery images Instead of trusting a third party to verify a certificate, each user is responsible for sharing their public key. Database management system This is a form of asymmetric cryptography.

RSAis similar to Diffie-Hellman with some variations. Sony xperia z data recovery RSA is also an asymmetric protocol but it takes care of signing the digital certificate as where Diffie-Hellman couldn’t do that.

In a nutshell, if asked the difference between the two, RSA is more of an encryption algorithm where Diffie-Hellman is more of a key-exchange protocol.

Hashingis not to be confused with encrypting. Note 3 data recovery Hashing is irreversible where as encryption is reversible. Database image MD5 and SHA-1 are fairly common hashing types but are no longer consider secure. S note data recovery SHA-256 is considered much stronger. Database 4d A salt is used in conjunction with a hash in order to make it more difficult to defend against dictionary attacks or rainbow table attacks. List of data recovery software What a salt does is append a random value to a password before it is hashed in order to prevent having the same hashes in a database if two users happen to use the same password.

Encodingis the simplest to reverse as its not designed for obscuring or hiding data. Types of data recovery A common form of encoding is base64. Data recovery android app What encoding does is converts data to a common form to be transferred over a medium in order to protect the integrity of the data.

CVSSstands for Common Vulnerability Scoring System. Z a r data recovery This is a universal language to describe the severity of a vulnerability. Database hacking Scores range from 0 to 10, where 10 is the most critical. Data recovery las vegas There are multiple metrics that go into calculating the score and these scores change over time depending on the number of target systems, damage potential, exploitability among others.

CVE stands for Common Vulnerabilities and Exposures. Data recovery micro sd This is a standard way to identify a vulnerability with a standard naming convention. A database is a collection of integrated and related This is where you see CVE-YEAR-SOME RANDOM NUMBERS. Database backend “CVE-2016-3578”. Gpu z database Mitre has a database of all CVE’s as well as NIST where you can see some details about each CVE as well as the associated CVSS score.

Get familiar with the Owasp Top Ten. They have a pretty nice cheat sheet you can study off of. Data recovery for android You should be familiar with at least one example based off each vulnerability.

• Missing Function Level Access Control – The admin tab is not shown to a normal user but it can still be accessed by plugging in “/categories/admin” after the host name.

OSI stands for Open Systems Interconnection model. Database types This is a theoretical model that helps us design and understand how data communication works.

Some key differences between a router, a switch and a hub are what they connect. Data recovery center A router connects networks and a switch connects hosts. Database entry A hub just connects hosts and instead of using logic to divert packets, it just sends to everyone. Database options A router uses IP addresses for transmitting data, a switch uses MAC addresses and a hub doesn’t care since it is broadcasting all received data.

Since ICMP is a Layer 3 protocol, it doesn’t use ports which take place at Layer 4. Database jokes That is why pinging does not require a port to be open. R studio data recovery download crack Using commands like tracert to determine the path of a packet also uses ICMP (Windows). Database software for mac This works by setting the TTL (Time To Live) to a low number and incrementing by one each time you get a response. Database questions for interview The response will be an ICMP error message since the TTL was reached before reaching the packet’s destination. Database cleaner This way, your device is able to build a list of devices that a packet crosses all the way to the destination. Data recovery hard disk Linux uses a similar method by using UDP instead of ICMP.