#dos

Ubuntu Security Notice 6812-1 - It was discovered that the Hotspot component of OpenJDK 17 incorrectly handled certain exceptions with specially crafted long messages. An attacker could possibly use this issue to cause a denial of service. It was discovered that OpenJDK 17 incorrectly performed reverse DNS query under certain circumstances in the Networking/HTTP client component. An attacker could possibly use this issue to obtain sensitive information.

Ubuntu Security Notice 6811-1 - It was discovered that the Hotspot component of OpenJDK 11 incorrectly handled certain exceptions with specially crafted long messages. An attacker could possibly use this issue to cause a denial of service. It was discovered that OpenJDK 11 incorrectly performed reverse DNS query under certain circumstances in the Networking/HTTP client component. An attacker could possibly use this issue to obtain sensitive information.

Ubuntu Security Notice 6810-1 - It was discovered that the Hotspot component of OpenJDK 8 incorrectly handled certain exceptions with specially crafted long messages. An attacker could possibly use this issue to cause a denial of service. Vladimir Kondratyev discovered that the Hotspot component of OpenJDK 8 incorrectly handled address offset calculations in the C1 compiler. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code.

The distributed denial-of-service (DDoS) botnet known as Muhstik has been observed leveraging a now-patched security flaw impacting Apache RocketMQ to co-opt susceptible servers and expand its scale. "Muhstik is a well-known threat targeting IoT devices and Linux-based servers, notorious for its ability to infect devices and utilize them for cryptocurrency mining and launching Distributed Denial

View CSAF 1. EXECUTIVE SUMMARY CVSS v4 5.6 ATTENTION: Low attack complexity Vendor: Emerson Equipment: PACSystem, Fanuc Vulnerabilities: Cleartext Transmission of Sensitive Information, Insufficient Verification of Data Authenticity Insufficiently Protected Credentials, Download of Code Without Integrity Check CISA is aware of a public report, known as "OT:ICEFALL", detailing vulnerabilities found in multiple operational technology (OT) vendors. CISA is issuing this advisory to provide notice of the reported vulnerabilities and identify baseline mitigations for reducing risks to these and other cybersecurity attacks. 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow remote code execution, loss of sensitive information, or a denial-of-service condition. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following Emerson products are affected: PAC Machine Edition: All versions (CVE-2022-30263, CVE-2022-30265) PACSystem RXi: All versions (CVE-2022-30263, CVE-202...

View CSAF 1. EXECUTIVE SUMMARY CVSS v3 9.8 ATTENTION: Exploitable remotely/low attack complexity Vendor: Emerson Equipment: Ovation Vulnerabilities: Missing Authentication for Critical Function, Insufficient Verification of Data Authenticity CISA is aware of a public report, known as "OT:ICEFALL", detailing vulnerabilities found in multiple operational technology (OT) vendors. CISA is issuing this advisory to provide notice of the reported vulnerabilities and identify baseline mitigations for reducing risks to these and other cybersecurity attacks. 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow remote code execution, loss of sensitive information, denial-of-service, or allow an attacker to modify the controller configuration. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following Emerson products are affected: Ovation: Version 3.8.0 Feature Pack 1 and prior 3.2 Vulnerability Overview 3.2.1 MISSING AUTHENTICATION FOR CRITICAL FUNCTION CWE-306 The affec...

### Summary An unsafe decompression vulnerability allows unauthenticated attackers to crash the collector via excessive memory consumption. ### Details The OpenTelemetry Collector handles compressed HTTP requests by recognizing the Content-Encoding header, rewriting the HTTP request body, and allowing subsequent handlers to process decompressed data. It supports the gzip, zstd, zlib, snappy, and deflate compression algorithms. A "zip bomb" or "decompression bomb" is a malicious archive designed to crash or disable the system reading it. Decompression of HTTP requests is typically not enabled by default in popular server solutions due to associated security risks. A malicious attacker could leverage this weakness to crash the collector by sending a small request that, when uncompressed by the server, results in excessive memory consumption. During proof-of-concept (PoC) testing, all supported compression algorithms could be abused, with zstd causing the most significant impact. Compre...

Links with a valid cHash argument lead to newly generated page cache entries. Because the cHash is not bound to a specific page, attackers could use valid cHash arguments for multiple pages, leading to additional useless page cache entries. Depending on the number of pages in the system and the number of available valid links with a cHash, attackers could add a considerable amount of additional cache entries, which in the end exceed storage limits and thus could lead to the system not responding any more. This means the Cache Flooding attack potentially could lead to a successful Denial of Service (DoS) attack.

### Describe the Bug Providing a non-numeric length value to the random string generation utility will create a memory issue breaking the capability to generate random strings platform wide. This creates a denial of service situation where logged in sessions can no longer be refreshed as sessions depend on the capability to generate a random session ID. ### To Reproduce 1. Test if the endpoint is working and accessible, `GET http://localhost:8055/utils/random/string` 2. Do a bad request `GET http://localhost:8055/utils/random/string?length=foo` 3. After this all calls to `GET http://localhost:8055/utils/random/string` will return an empty string instead of a random string 4. In this error situation you'll see authentication refreshes fail for the app and api. ### Impact This counts as an unauthenticated denial of service attack vector so this impacts all unpatched instances reachable over the internet.

### Summary iq80 Snappy performs out-of-bounds read access when uncompressing certain data, which can lead to a JVM crash. ### Details When uncompressing certain data, Snappy tries to read outside the bounds of the given byte arrays. Because Snappy uses the JDK class `sun.misc.Unsafe` to speed up memory access, no additional bounds checks are performed and this has similar security consequences as out-of-bounds access in C or C++, namely it can lead to non-deterministic behavior or crash the JVM. iq80 Snappy is not actively maintained anymore. As quick fix users can upgrade to version 0.5, but in the long term users should prefer migrating to the Snappy implementation in https://github.com/airlift/aircompressor (version 0.27 or newer). ### Impact When uncompressing data from untrusted users, this can be exploited for a denial-of-service attack by crashing the JVM.