.NET Core 3.0, has shipped with the new System.Text.Json APIs, which provides built-in support for JSON, including reader/writer, read-only DOM, and serializer/deserializer. With the performance, the main improvement to the methods, check and see the typical speedups of up to 2x over Json.NET.
The new feature Async Streams in C# has removed the scalar result limitation and allows the async method to returns multiple results.
This change makes the async pattern more flexible so that you can retrieve data in lazy asynchronous sequence from a database or you can download data from an asynchronous sequence that returns the data in chunks when they become available.
Continue reading Async StreamsIt is possible to trick a user into executing potentially dangerous actions against the target site due to a lack of Cross- Site-Request-Forgery (CSRF) protections. CSRF attacks are a class of confused deputy attacks that exploit the behaviour of browsers always sending authorization cookies in requests. The target site has no secure way of verifying the request was initiated from a link on a trusted domain.
The SSL Certificate Details provide information about the certificate associated with the HTTPS server. This information describes important attributes of the certificate and should be reviewed for the correctness of the contact information, whether it is self-signed, and how soon it will expire. The Supported Ciphers provides information about each available encryption scheme available for each of the possible SSL/TLS protocols.
The expiration date for certificates should be monitored. New certificates should be available before the expiration date in order to maintain continuity of service and avoid downtime or displaying certificate expiration errors in users’ web browsers.
“Server Side Request Forgery” (a.k.a. SSRF) is a class of web-application vulnerability in which an attacker can cause a website to access unintended server-side resources, including the unauthorized reading, writing, or execution of server resources.
Web-applications designed to pass URLs (references to server accessible content) or portions thereof, from the client browser to the application server using HTTP request parameters or HTTP request headers, are at risk for Server Side Request Forgery exploitation unless they protect against it.
Server-side Request Forgery (SSRF) is related to another type of vulnerability called Open Redirects in the sense that they both rely on untrusted input to reference other web-resources.
Strategies for avoiding and/or fixing Server-Side Request Forgery include:
If URI is hard-coded, then the attacker cannot influence where the request is going, so it would look to be a false positive. However, although some scanning software is known for false positives, you need to be careful, as most scanning software are correct in their analysis. You need to check the whole source-to-sink trace that scanning software provides? If it is reporting only that one line as the source and sink, then yes it is a false positive.
Useful links:
https://www.owasp.org/index.php/Server_Side_Request_Forgery
A function call contains an HTTP response splitting flaw. Writing untrusted input into an HTTP header allows an attacker to manipulate the HTTP response rendered by the browser, leading to cache poisoning and cross-site scripting attacks.
Remove unexpected carriage returns and line feeds from untrusted data used to construct an HTTP response. Always validate untrusted input to ensure that it conforms to the expected format, using centralized data validation routines when possible.
A simple string extension can resolve this issue:
public static string CRLFRemoval(this string token) { return token.Replace("%0d", string.Empty, StringComparison.InvariantCultureIgnoreCase) .Replace("%0D", string.Empty, StringComparison.InvariantCultureIgnoreCase) .Replace("\r", string.Empty) .Replace("\n", string.Empty) .Replace("%0a", string.Empty, StringComparison.InvariantCultureIgnoreCase) .Replace("%0A", string.Empty, StringComparison.InvariantCultureIgnoreCase); }
Links for reference:
https://en.wikipedia.org/wiki/HTTP_response_splitting
https://securiteam.com/securityreviews/5WP0E2KFGK
https://www.owasp.org/index.php?title=Testing_for_HTTP_Splitting/Smuggling_(OTG-INPVAL-017)
