Expect version 23.0.0 represents an update to the assertion library commonly used with Jest, offering developers enhancements and refinements over the previous stable version, 22.4.3. Both versions maintain the core functionality of providing the expect function for writing clear and concise tests as documented on the Jest website. Analyzing the metadata, the newer version includes updates to its dependencies, notably bumping jest-diff, jest-get-type, jest-regex-util, jest-message-util, and jest-matcher-utils to version 23.0.0 aligning them with the primary package version. This suggests improvements or bug fixes within these utility modules that developers leveraging the expect library indirectly benefit from.
The dist information displays that expect 23.0.0 has a slightly larger unpacked size (569152 bytes) compared to expect 22.4.3 (528333 bytes), and a higher file count (17 versus 12). This increased size could point to new features, improved documentation, or potentially more extensive testing within the package. The releaseDate shows expect 23.0.0 was released on May 24, 2018, offering a more recent snapshot of the library compared to the March 21, 2018 release of version 22.4.3. Developers should consider upgrading to version 23.0.0 to take advantage of potential bug fixes, performance improvements, and new features within the core expect functionality and its utility dependencies.
All the vulnerabilities related to the version 23.0.0 of the package
Regular Expression Denial of Service (ReDoS) in micromatch
The NPM package micromatch prior to version 4.0.8 is vulnerable to Regular Expression Denial of Service (ReDoS). The vulnerability occurs in micromatch.braces() in index.js because the pattern .* will greedily match anything. By passing a malicious payload, the pattern matching will keep backtracking to the input while it doesn't find the closing bracket. As the input size increases, the consumption time will also increase until it causes the application to hang or slow down. There was a merged fix but further testing shows the issue persisted prior to https://github.com/micromatch/micromatch/pull/266. This issue should be mitigated by using a safe pattern that won't start backtracking the regular expression due to greedy matching.
Regular Expression Denial of Service (ReDoS) in braces
A vulnerability was found in Braces versions prior to 2.3.1. Affected versions of this package are vulnerable to Regular Expression Denial of Service (ReDoS) attacks.
Regular Expression Denial of Service in braces
Versions of braces prior to 2.3.1 are vulnerable to Regular Expression Denial of Service (ReDoS). Untrusted input may cause catastrophic backtracking while matching regular expressions. This can cause the application to be unresponsive leading to Denial of Service.
Upgrade to version 2.3.1 or higher.
Uncontrolled resource consumption in braces
The NPM package braces fails to limit the number of characters it can handle, which could lead to Memory Exhaustion. In lib/parse.js, if a malicious user sends "imbalanced braces" as input, the parsing will enter a loop, which will cause the program to start allocating heap memory without freeing it at any moment of the loop. Eventually, the JavaScript heap limit is reached, and the program will crash.
