#dos

Ubuntu Security Notice 6699-1 - Reima Ishii discovered that the nested KVM implementation for Intel x86 processors in the Linux kernel did not properly validate control registers in certain situations. An attacker in a guest VM could use this to cause a denial of service. It was discovered that the Quick Fair Queueing scheduler implementation in the Linux kernel did not properly handle network packets in certain conditions, leading to a use after free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

Versions of the package black before 24.3.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the lines_with_leading_tabs_expanded function in the strings.py file. An attacker could exploit this vulnerability by crafting a malicious input that causes a denial of service. Exploiting this vulnerability is possible when running Black on untrusted input, or if you habitually put thousands of leading tab characters in your docstrings.

### Impact All historical installations of django-wiki are vulnerable to maliciously crafted article content, that can cause severe use of server CPU through a regular expression loop. ### Patches ### Workarounds Close off access to create and edit articles by anonymous users. ### References _Are there any links users can visit to find out more?_

### Summary An attacker can exploit a critical flaw in the application to initiate a Denial of Service (DoS) attack, rendering the application inoperable and affecting all users. The issue arises from unsafe manipulation of an array in a multi-threaded environment. ### Details The vulnerability is rooted in the application's code, where an array is being modified while it is being iterated over. This is a classic programming error but becomes critically unsafe when executed in a multi-threaded environment. When two threads interact with the same array simultaneously, the application crashes. The core issue is located in [expireOldFailedAttempts](https://github.com/argoproj/argo-cd/blob/54601c8fd30b86a4c4b7eb449956264372c8bde0/util/session/sessionmanager.go#L302-L311) function: ```go func expireOldFailedAttempts(maxAge time.Duration, failures *map[string]LoginAttempts) int { expiredCount := 0 for key, attempt := range *failures { if time.Since(attempt.LastFailed) > maxAge*time.Sec...

### Summary An attacker can exploit a chain of vulnerabilities, including a Denial of Service (DoS) flaw and in-memory data storage weakness, to effectively bypass the application's brute force login protection. This makes the application susceptible to brute force attacks, compromising the security of all user accounts. ### Details The issue arises from two main vulnerabilities: 1. The application crashes due to a previously described DoS vulnerability caused by unsafe array modifications in a multi-threaded environment. 2. The application saves the data of failed login attempts in-memory, without persistent storage. When the application crashes and restarts, this data is lost, resetting the brute force protections. ```go // LoginAttempts is a timestamped counter for failed login attempts type LoginAttempts struct { // Time of the last failed login LastFailed time.Time `json:"lastFailed"` // Number of consecutive login failures FailCount int `json:"failCount"` } ``` By chainin...

Ubuntu Security Notice 6696-1 - Yi Yang discovered that the Hotspot component of OpenJDK 8 incorrectly handled array accesses in the C1 compiler. An attacker could possibly use this issue to cause a denial of service, execute arbitrary code or bypass Java sandbox restrictions. It was discovered that the Hotspot component of OpenJDK 8 did not properly verify bytecode in certain situations. An attacker could possibly use this issue to bypass Java sandbox restrictions.

By Waqas Cyber Warfare Takes Flight: Geopolitics Fuel Attacks on Airlines - Dark Web Tool Aims at E-commerce! This is a post from HackRead.com Read the original post: Dark Web Tool Arms Ransomware Gangs: E-commerce & Aviation Industries Targeted

In Django 3.2 before 3.2.25, 4.2 before 4.2.11, and 5.0 before 5.0.3, the django.utils.text.Truncator.words() method (with html=True) and the truncatewords_html template filter are subject to a potential regular expression denial-of-service attack via a crafted string. NOTE: this issue exists because of an incomplete fix for CVE-2019-14232 and CVE-2023-43665.

Ubuntu Security Notice 6694-1 - It was discovered that Expat could be made to consume large amounts of resources. If a user or automated system were tricked into processing specially crafted input, an attacker could possibly use this issue to cause a denial of service.

Ubuntu Security Notice 6695-1 - It was discovered that TeX Live incorrectly handled certain memory operations in the embedded axodraw2 tool. An attacker could possibly use this issue to cause TeX Live to crash, resulting in a denial of service. This issue only affected Ubuntu 20.04 LTS. It was discovered that TeX Live allowed documents to make arbitrary network requests. If a user or automated system were tricked into opening a specially crafted document, a remote attacker could possibly use this issue to exfiltrate sensitive information, or perform other network-related attacks. This issue only affected Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS.