#git

### Summary The function `lookupPreprocess()` is meant to apply some transformations to a string by disabling characters in the regex `[-_ .]`. However, due to the use of late Unicode normalization of type NFKD, it is possible to bypass that validation and re-introduce all the characters in the regex `[-_ .]`. ```go // lookupPreprocess applies transformations to s so that it can be compared // to search for something. // For example, it is used by (ThemeStore).Lookup func lookupPreprocess(s string) string { return strings.ToLower(norm.NFKD.String(regexp.MustCompile(`[-_ .]`).ReplaceAllString(s, ""))) } ``` Take the following equivalent Unicode character U+2024 (․). Initially, the `lookupPreprocess()` function would compile the regex and replace the regular dot (.). However, the U+2024 (․) would bypass the `ReplaceAllString()`. When the normalization operation is applied to U+2024 (․), the resulting character will be U+002E (.). Thus, the dot was reintroduced back. ### Impact The...

### Impact When decoding user supplied MessagePack messages, users can trigger stuck threads by crafting messages that keep the decoder stuck in a loop. ### Patches The fix is available in v1.10.1 ### Workarounds Exploits seem to require structured cloning, replacing the 0x70 extension with your own (that throws an error or does something other than recursive referencing) should mitigate the issue. ### References

### Impact In ActiveAdmin versions prior to 3.2.0, maliciously crafted spreadsheet formulas could be uploaded as part of admin data that, when exported to a CSV file and the imported to a spreadsheet program like libreoffice, could lead to remote code execution and private data exfiltration. The attacker would need privileges to upload data to the same ActiveAdmin application as the victim, and would need the victim to possibly ignore security warnings from their spreadsheet program. ### Patches Versions 3.2.0 and above fixed the problem by escaping any data starting with `=` and other characters used by spreadsheet programs. ### Workarounds Only turn on formula evaluation in spreadsheet programs when importing CSV after explicitly reviewing the file. ### References https://owasp.org/www-community/attacks/CSV_Injection https://github.com/activeadmin/activeadmin/pull/8167

### Impact Denial of Service, Applications that allow the use of the PBKDF2 algorithm. ### Patches A [patch](https://github.com/latchset/jwcrypto/commit/d2655d370586cb830e49acfb450f87598da60be8) is available that sets the maximum number of default rounds. ### Workarounds Applications that do not need to use PBKDF2 should simply specify the algorithms use and exclude it from the list. Applications that need to use the algorithm should upgrade to the new version that allows to set a maximum rounds number. ### Acknowledgement The issues was reported by Jingcheng Yang and Jianjun Chen from Sichuan University and Zhongguancun Lab

Prior work from this researcher disclosed how PowerShell executes unintended files or BASE64 code when processing specially crafted filenames. This research builds on their PSTrojanFile work, adding a PS command line single quote bypass and PS event logging failure. On Windows CL tab, completing a filename uses double quotes that can be leveraged to trigger arbitrary code execution. However, if the filename got wrapped in single quotes it failed, that is until now.

By Waqas Big Tech vs. Big Brother: Apple Defies India Pressure over iPhone Hacking Alerts. This is a post from HackRead.com Read the original post: Apple’s iPhone Hack Attack Warnings Spark Political Firestorm in India

From Sam Altman and Elon Musk to ransomware gangs and state-backed hackers, these are the individuals and groups that spent this year disrupting the world we know it.

Online scams abound every day, but these four scams from 2023 were particularly devious.

A new malware loader is being used by threat actors to deliver a wide range of information stealers such as Lumma Stealer (aka LummaC2), Vidar, RecordBreaker (aka Raccoon Stealer V2), and Rescoms. Cybersecurity firm ESET is tracking the trojan under the name Win/TrojanDownloader.Rugmi. "This malware is a loader with three types of components: a downloader that downloads an

hutool-core v5.8.23 was discovered to contain an infinite loop in the StrSplitter.splitByRegex function. This vulnerability allows attackers to cause a Denial of Service (DoS) via manipulation of the first two parameters.