Swift

Legacy functions like arc4random() or arc4random_uniform() should not be used for generating random numbers. These functions are provided through imported C APIs, and depending on the platform that is executing the code, their underlying implementations can be unsafe.

Choosing secure TLS versions in your app is important because using outdated or vulnerable TLS versions can expose your app's communication to potential attacks. Malicious actors could take advantage of known vulnerabilities in these older TLS versions to intercept sensitive information, compromise user privacy, or perform other malicious actions. TLS versions 1.0 and 1.1 have been found to have several vulnerabilities.

When a web view loads content from a source (like a web page or HTML string), it can also make additional network requests to fetch resources such as images, scripts, stylesheets, etc. If the base URL for these requests is not properly restricted, an attacker could craft URLs that point to local files or malicious websites. This can result in unintended data leakage or execution of malicious scripts.

The number of iterations in the password hashing process directly impacts the computational complexity and time it takes to compute the hash. A low number of iterations can be easily computed by attackers, allowing them to use techniques like brute force or rainbow table attacks to quickly crack the hashed passwords.

ECB encrypts identical plaintext blocks into identical ciphertext blocks. This means that if the same plaintext block appears multiple times in the message, it will result in the same ciphertext block. This behavior makes the encryption vulnerable to certain attacks, such as replay attacks, where an attacker can intercept and replay the encrypted blocks to recreate the original message.

Setting the shouldResolveExternalEntities option to true in the XMLParser instance can make your application vulnerable to XXE attacks. An XXE attack occurs when an attacker tricks an XML parser into processing external entities from a malicious XML input.

DES uses a fixed key length of 56 bits, which is considered insufficient to resist modern brute-force attacks. With the computational power available today, a brute-force attack on DES can be executed relatively quickly. Triple Data Encryption Standard (3DES), also known as TDEA or DESede, is an enhancement of the original Data Encryption Standard (DES) algorithm. It aims to improve the security of DES by applying the algorithm multiple times in succession with different keys. While 3DES is more secure than single DES. But even Triple DES was proven ineffective against brute force attacks (in addition to slowing down the process substantially).