#dos

## 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.

Multiple HTTP/2 implementations have been found susceptible to a new attack technique called MadeYouReset that could be explored to conduct powerful denial-of-service (DoS) attacks. "MadeYouReset bypasses the typical server-imposed limit of 100 concurrent HTTP/2 requests per TCP connection from a client. This limit is intended to mitigate DoS attacks by restricting the number of simultaneous

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global). View CSAF 1. EXECUTIVE SUMMARY CVSS v3 6.3 ATTENTION: Low Attack Complexity Vendor: Siemens Equipment: SIMATIC RTLS Locating Manager Vulnerabilities: Reachable Assertion, Insufficiently Protected Credentials 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow an attacker to cause a denial of service condition or escalate to higher access rights. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS Siemens reports that the following products are affected: Siemens SIMATIC RTLS Locating Manager: all versions prior to 3.3 3.2 VULNERABILITY OVERVIEW 3.2.1 REACHABLE ASSERTION CWE-617 Affected devices do not properly validate input sent to its listening port on the ...