#dos

### Summary A Denial of Service (DoS) vulnerability can be triggered by sending a single HTTP GET request with an extremely large header to an HTTP endpoint. This results in server memory exhaustion, potentially leading to a crash or unresponsiveness. The attack does not require authentication, making it exploitable by any remote user. ### Details The vulnerability leverages the abuse of HTTP headers. By setting a header such as `X-Forwarded-For` to a very large value like `("A" * 5_800_000_000)`, the server's HTTP parser or application logic may attempt to load the entire request into memory, overwhelming system resources. ### Impact _What kind of vulnerability is it? Who is impacted?_ Type of vulnerability: Denial of Service (DoS) ### Resolution Upgrade to a version of vLLM that includes appropriate HTTP limits by deafult, or use a proxy in front of vLLM which provides protection against this issue.

View CSAF 1. EXECUTIVE SUMMARY CVSS v3 5.3 ATTENTION: Exploitable remotely/Low attack complexity Vendor: Mitsubishi Electric Corporation Equipment: MELSEC iQ-F Series CPU module Vulnerability: Improper Handling of Length Parameter Inconsistency 2. RISK EVALUATION Successful exploitation of this vulnerability could result in a remote attacker being able to delay the processing of the Web server function and prevent legitimate users from utilizing the Web server function by sending a specially crafted HTTP request. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of MELSEC iQ-F Series CPU module are affected: MELSEC iQ-F Series CPU module FX5U-32MT/ES: Versions 1.060 and later MELSEC iQ-F Series CPU module FX5U-32MT/DS: Versions 1.060 and later MELSEC iQ-F Series CPU module FX5U-32MT/ESS: Versions 1.060 and later MELSEC iQ-F Series CPU module FX5U-32MT/DSS: Versions 1.060 and later MELSEC iQ-F Series CPU module FX5U-32MR/ES: Versions 1.060 and later MELSEC iQ-F Series CP...

## Technical Details Below is a technical explanation of a newly discovered vulnerability in HTTP/2, which we refer to as “MadeYouReset.” ### MadeYouReset Vulnerability Summary The MadeYouReset DDoS vulnerability is a logical vulnerability in the HTTP/2 protocol, that uses malformed HTTP/2 control frames in order to break the max concurrent streams limit - which results in resource exhaustion and distributed denial of service. ### Mechanism The vulnerability uses malformed HTTP/2 control frames, or malformed flow, in order to make the server reset streams created by the client (using the RST_STREAM frame). The vulnerability could be triggered by several primitives, defined by the RFC of HTTP/2 (RFC 9113). The Primitives are: 1. WINDOW_UPDATE frame with an increment of 0 or an increment that makes the window exceed 2^31 - 1. (section 6.9 + 6.9.1) 2. HEADERS or DATA frames sent on a half-closed (remote) stream (which was closed using the END_STREAM flag). (note that for some implemen...

There's a vulnerability in the CRI-O application where when container is launched with securityContext.runAsUser specifying a non-existent user, CRI-O attempts to create the user, reading the container's entire /etc/passwd file into memory. If this file is excessively large, it can cause the a high memory consumption leading applications to be killed due to out-of-memory. As a result a denial-of-service can be achieved, possibly disrupting other pods and services running in the same host.

Frankfurt am Main, Germany, 20th August 2025, CyberNewsWire

A Russian state-sponsored group, Static Tundra, is exploiting an old Cisco IOS vulnerability to compromise unpatched network devices worldwide, targeting key sectors for intelligence gathering.

A 22-year-old man from the U.S. state of Oregon has been charged with allegedly developing and overseeing a distributed denial-of-service (DDoS)-for-hire botnet called RapperBot. Ethan Foltz of Eugene, Oregon, has been identified as the administrator of the service, the U.S. Department of Justice (DoJ) said. The botnet has been used to carry out large-scale DDoS-for-hire attacks targeting

Microsoft Knack 0.12.0 allows Regular expression Denial of Service (ReDoS) in the knack.introspection module (issue 2 of 2).

Microsoft Knack 0.12.0 allows Regular expression Denial of Service (ReDoS) in the knack.introspection module (issue 1 of 2).

A 22-year-old Oregon man has been arrested on suspicion of operating "Rapper Bot," a massive botnet used to power a service for launching distributed denial-of-service (DDoS) attacks against targets -- including a March 2025 DDoS that knocked Twitter/X offline. The Justice Department asserts the suspect and an unidentified co-conspirator rented out the botnet to online extortionists, and tried to stay off the radar of law enforcement by ensuring that their botnet was never pointed at KrebsOnSecurity.