In the above case, if a user enters +890, then a blacklist will say it is valid because it does not contain A-Z. Whereas a whitelist will say it contains a character that is not a number, and only numbers are allowed, so it is invalid. By converting input data into its encoded form, this problem can be solved, and client side code execution can be prevented. Logging is storing a protected audit trail that allows an operator to reconstruct the actions of any subject or object that performs an action or has an action performed against it. Monitoring is reviewing security events generated by a system to detect if an attack has occurred or is currently occurring.
- Authorization is the process of giving someone permission to do or have something.
- A broken or risky crypto algorithm is one that has a coding flaw within the implementation of the algorithm that weakens the resulting encryption.
- The injection-style attacks come in many flavors, from the most popular SQL injection to command, LDAP, and ORM.
- The OWASP Proactive Controls is one of the best-kept secrets of the OWASP universe.
- A security guard stops all guys wearing a red t-shirt who are trying to enter a mall, but anyone else can enter.
Software and data integrity failures include issues that do not protect against integrity failures in software creation and runtime data exchange between entities. One example of a failure involves using untrusted software in a build pipeline to generate a software release. This issue manifests as a lack of MFA, allowing brute force-style attacks, exposing session identifiers, and allowing weak or default passwords. An application could have vulnerable and outdated components due to a lack of updating dependencies. A component, in this case, was added at some point in the past, and the developers do not have a mechanism to check for security problems and update their software components. Sometimes developers unwittingly download parts that come built-in with known security issues.
A06 Vulnerable and Outdated Components
Everyone knows the OWASP Top Ten as the top application security risks, updated every few years. Proactive Controls is a catalog of available security controls that counter one or many of the top ten. Below is an example of an application that stores the user’s password in plaintext inside a MySQL database.
This regular expression ensures that first name should include characters A-Z and a-z. We recently migrated our community to a new web platform and regretably the content for this page needed to be programmatically ported from its previous wiki page. Use the extensive project presentation that expands on the information in the document.
A08 Software and Data Integrity Failures
It has to be ensured at all times that access certain parts of the application should be accessible to users with certain privileges only. OWASP has a project named OWASP ESAPI, which allows users to handle data in a secure manner using industry tested libraries and security functions. In the above code, user input is not filtered and used, as it is part of message to be displayed to the user without implementing any sort of output encoding. Using a parameterized query makes sure that the SQL logic is defined first and locked.
Observe in the above code that the session cookie JSESSIONID remains the same for pre- and post-login. This vulnerability can be exploited by an attacker who has physical access to the machine and notes the value of session cookie pre-authentication. The above code shows that here sensitive information (i.e. password) https://remotemode.net/become-a-net-razor-developer/owasp-proactive-controls/ is stored in a salted MD5 format. If the database is compromised, then the attacker will have to find clear text for the hashed passwords, or else it will be of no use. For example, if you want to access your bank account details or perform a transaction, you need to login into your bank account website.
A risky crypto algorithm may be one that was created years ago, and the speed of modern computing has caught up with the algorithm, making it possible to be broken using modern computing power. A hard-coded or default password is a single password, added to the source code, and deployed to wherever the application is executing. With a default password, if attackers learn of the password, they are able to access all running instances of the application. Insufficient entropy is when crypto algorithms do not have enough randomness as input into the algorithm, resulting in an encrypted output that could be weaker than intended. Depending upon the programming language a developer uses to build an application, regular expression can easily be implemented in it. Another advantage of regular expressions is that there are many industry tested regular expressions for all popular input types.
- This changes the post-login session cookie value, and Session Fixation vulnerability cannot be exploited.
- Using a parameterized query makes sure that the SQL logic is defined first and locked.
- The OWASP Top Ten Proactive Controls describes the most important controls and control categories that every architect and developer should absolutely, 100% include in every project.
- It has to be ensured at all times that access certain parts of the application should be accessible to users with certain privileges only.
The document was then shared globally so even anonymous suggestions could be considered. Probably the best advice on checklists is given by the Application Security Verification Standard (ASVS). The OWASP Top Ten Proactive Controls describes the most important controls and control categories that every architect and developer should absolutely, 100% include in every project. The OWASP Developer Guide is a community effort and this page needs some content to be added. If you have suggestions then submit an issue and the project team can assign it to you,
or submit a pull request with some content.