#dos

Organizations that rely on their content delivery network provider for Web application firewall services may be inadvertently leaving themselves open to attack.

### Impact In Synapse before 1.120.1, `multipart/form-data` requests can in certain configurations transiently increase memory consumption beyond expected levels while processing the request, which can be used to amplify denial of service attacks. ### Patches Synapse 1.120.1 resolves the issue by denying requests with unsupported `multipart/form-data` content type. ### Workarounds Limiting request sizes or blocking the `multipart/form-data` content type before the requests reach Synapse, for example in a reverse proxy, alleviates the issue. Another approach that mitigates the attack is to use a low `max_upload_size` in Synapse. ### References - https://github.com/twisted/twisted/issues/4688#issuecomment-1167705518 - https://github.com/twisted/twisted/issues/4688#issuecomment-2385711609 ### For more information If you have any questions or comments about this advisory, please email us at [security at element.io](mailto:security@element.io).

### Impact Synapse versions before 1.106 are vulnerable to a disk fill attack, where an unauthenticated adversary can induce Synapse to download and cache large amounts of remote media. The default rate limit strategy is insufficient to mitigate this. This can lead to a denial of service, ranging from further media uploads/downloads failing to completely unavailability of the Synapse process, depending on how Synapse was deployed. ### Patches Synapse 1.106 introduces a new "leaky bucket" rate limit on remote media downloads to reduce the amount of data a user can request at a time. This does not fully address the issue, but does limit an unauthenticated user's ability to request large amounts of data to be cached. ### Workarounds Synapse deployments can currently decrease the maximum file size allowed, as well as increase request rate limits. However, this does not as effectively address the issue as a dedicated rate limit on remote media downloads. Server operators may also wish...

Ubuntu Security Notice 7134-1 - Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information across domains, or execute arbitrary code.

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, see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global). View CSAF 1. EXECUTIVE SUMMARY CVSS v4 9.3 ATTENTION: Exploitable remotely/low attack complexity Vendor: Siemens Equipment: RUGGEDCOM APE1808 Vulnerabilities: Missing Authentication for Critical Function, NULL Pointer Dereference, Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow an attacker to gain access to the management web interface or cause a denial-of-service condition. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following Siemens products are affected: RUGGEDCOM APE1808: all ...

View CSAF 1. EXECUTIVE SUMMARY CVSS v4 9.3 ATTENTION: Exploitable remotely/low attack complexity Vendor: Ruijie Equipment: Reyee OS Vulnerabilities: Weak Password Recovery Mechanism for Forgotten Password, Exposure of Private Personal Information to an Unauthorized Actor, Premature Release of Resource During Expected Lifetime, Insecure Storage of Sensitive Information, Use of Weak Credentials, Improper Neutralization of Wildcards or Matching Symbols, Improper Handling of Insufficient Permissions or Privileges, Server-Side Request Forgery (SSRF), Use of Inherently Dangerous Function, Resource Leak 2. RISK EVALUATION Successful exploitation of this vulnerabilities could allow attackers to take near full control over the device. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following Ruijie product is affected: Reyee OS: Versions 2.206.x up to but not including 2.320.x 3.2 Vulnerability Overview 3.2.1 Weak Password Recovery Mechanism for Forgotten Password CWE-640 Ruijie Reyee OS version...

### Summary When parsing form data, `python-multipart` skips line breaks (CR `\r` or LF `\n`) in front of the first boundary and any tailing bytes after the last boundary. This happens one byte at a time and emits a log event each time, which may cause excessive logging for certain inputs. An attacker could abuse this by sending a malicious request with lots of data before the first or after the last boundary, causing high CPU load and stalling the processing thread for a significant amount of time. In case of ASGI application, this could stall the event loop and prevent other requests from being processed, resulting in a denial of service (DoS). ### Impact Applications that use `python-multipart` to parse form data (or use frameworks that do so) are affected. ### Original Report This security issue was reported by: - GitHub security advisory in Starlette on October 30 by @Startr4ck - Email to `python-multipart` maintainer on October 3 by @mnqazi

### Summary Note: i'm reporting this in this way purely because it's private and i don't want to broadcast vulnerabilities. > An unsafe reading of environment file could potentially cause a denial of service in Netty. When loaded on an Windows application, Netty attempts to load a file that does not exist. If an attacker creates such a large file, the Netty application crashes. This vulnerability is fixed in 4.1.115. ### Details https://github.com/redis/lettuce/blob/main/pom.xml#L67C9-L67C53 The netty version pinned here is currently ``` <netty.version>4.1.113.Final</netty.version> ``` This version is vulnerable according to Snyk and is affecting one of our products:  Here is a [link](https://www.cve.org/CVERecord?id=CVE-2024-47535) to the CVE ### PoC _Complete instructions, including specific configuration details, to reproduce the vulnerability._ Not applicable ### Impact _What kind of vuln...

ABB Cylon Aspect version 3.08.00 suffers from a vulnerability in the fileSystemUpdate.php endpoint of the ABB BEMS controller due to improper handling of uploaded files. The endpoint lacks restrictions on file size and type, allowing attackers to upload excessively large or malicious files. This flaw could be exploited to cause denial of service (DoS) attacks, memory leaks, or buffer overflows, potentially leading to system crashes or further compromise.

Debian Linux Security Advisory 5821-1 - Multiple security issues were discovered in Thunderbird, which could result in denial of service or the execution of arbitrary code.