#dos

Cisco Talos’ Vulnerability Discovery & Research team recently disclosed three vulnerabilities found in Eclipse ThreadX and four vulnerabilities in STMicroelectronics.    The vulnerabilities mentioned in this blog post have been patched by their respective vendors, all in adherence to Cisco’s third-party vulnerability disclosure policy.

### Impact This report is to highlight a vulnerability in XGrammar, a library used by the structured output feature in vLLM. The XGrammar advisory is here: https://github.com/mlc-ai/xgrammar/security/advisories/GHSA-389x-67px-mjg3 The [xgrammar](https://xgrammar.mlc.ai/docs/) library is the default backend used by vLLM to support structured output (a.k.a. guided decoding). Xgrammar provides a required, built-in cache for its compiled grammars stored in RAM. xgrammar is available by default through the OpenAI compatible API server with both the V0 and V1 engines. A malicious user can send a stream of very short decoding requests with unique schemas, resulting in an addition to the cache for each request. This can result in a Denial of Service by consuming all of the system's RAM. Note that even if vLLM was configured to use a different backend by default, it is still possible to choose xgrammar on a per-request basis using the `guided_decoding_backend` key of the `extra_body` field ...

View CSAF 1. EXECUTIVE SUMMARY CVSS v4 8.8 ATTENTION: Exploitable remotely/low attack complexity Vendor: ABB Equipment: M2M Gateway Vulnerabilities: Integer Overflow or Wraparound, Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling'), Unquoted Search Path or Element, Untrusted Search Path, Use After Free, Out-of-bounds Write, Buffer Copy without Checking Size of Input ('Classic Buffer Overflow'), Missing Release of Memory after Effective Lifetime, Allocation of Resources Without Limits or Throttling, Improper Privilege Management, Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'), Improper Restriction of Operations within the Bounds of a Memory Buffer, Incorrect Calculation of Buffer Size, Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'), Access of Resource Using Incompatible Type ('Type C...

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 v4 6.9 ATTENTION: Exploitable remotely/low attack complexity Vendor: Siemens Equipment: SIMOCODE, SIMATIC, SIPLUS, SIDOOR, SIWAREX Vulnerability: Uncontrolled Resource Consumption 2. RISK EVALUATION Successful exploitation of this vulnerability could allow remote attackers to affect the availability of the devices under certain conditions. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS Siemens reports that the following products are affected: SIMOCODE pro V PROFINET: All versions SIMATIC S7-1200 CPU 1215C AC/DC/Rly (6ES7215-1BG40-0XB0): Versions prior to V4.4 SIPLUS S7-1200 CPU 1215C DC/DC/DC (6AG1215-1AG40-5XB0): Versions prior to V4.4 SIMATIC ...

NVIDIA's incomplete security patch, combined with a Docker vulnerability, creates a serious threat for organizations using containerized environments. This article explains the risks and mitigation strategies.

SSH servers which implement file transfer protocols are vulnerable to a denial of service attack from clients which complete the key exchange slowly, or not at all, causing pending content to be read into memory, but never transmitted.

SurrealDB allows authenticated users with `OWNER` or `EDITOR` permissions at the root, database or namespace levels to define their own database functions using the `DEFINE FUNCTION` statement A custom database function comprises a name together with a function body. In the function body, the user programs the functionality of the function in terms of SurrealQL. The language includes a `FOR` keyword, used to implement for-loops. Whilst the parser and interpreter constrain the number of iterations for a single for-loop, nesting several for-loops with a large number of iterations is possible. Thus, an attacker could define a function that comprises several nested for-loops with an iteration count of 1.000.000 each. Executing the function will consume all the CPU time of the server, timeouts configured will not break the CPU consumption, and the function execution monopolizes all CPU time of the SurrealDB server, effectively preventing the server from executing functions, queries, com...

Through enabling the scripting capability. SurrealDB allows for advanced functions with complicated logic, by allowing embedded functions to be written in JavaScript. These functions are bounded for memory and stack size, but not in time. An attacker could launch a number of long running functions that could potentially facilitate a Denial Of Service attack. This vulnerability can only affect SurrealDB servers explicitly enabling the scripting capability with `--allow-scripting` or `--allow-all` and equivalent environment variables `SURREAL_CAPS_ALLOW_SCRIPT=true` and `SURREAL_CAPS_ALLOW_ALL=true`. This issue was discovered and patched during an code audit and penetration test of SurrealDB by cure53, the severity defined within cure53's preliminary finding is Low, matched by our CVSS v4 assessment. ### Impact An attacker can use the scripting capabilities of SurrealDB to run a series of long running functions to facilitate a Denial Of Service attack. ### Patches A default timeout ...

An authenticated user can craft a query using the `string::replace` function that uses a Regex to perform a string replacement. As there is a failure to restrict the resulting string length, this enables an attacker to send a `string::replace` function to the SurrealDB server exhausting all the memory of the server due to string allocations. This eventually results in a Denial-of-Service situation for the SurrealDB server. This issue was discovered and patched during an code audit and penetration test of SurrealDB by cure53. Using CVSSv4 definitions, the severity is High. ### Impact An authenticated user can crash the SurrealDB instance through memory exhaustion ### Patches A patch has been created that enforces a limit on string length `SURREAL_GENERATION_ALLOCATION_LIMIT` - Versions 2.0.5, 2.1.5, 2.2.2, and later are not affected by this issue ### Workarounds Affected users who are unable to update may want to limit the ability of untrusted clients to run the `string::replace`...

A vulnerability was found where an attacker can crash the database via crafting a HTTP query that returns a null byte. The problem relies on an uncaught exception in the `net` module, where the result of the query will be converted to JSON before showing as the HTTP response to the user in the **/sql** endpoint. ### Impact This vulnerability allows any authenticated user to crash a SurrealDB instance by sending a crafted query with a null byte to the /sql endpoint. Where SurrealDB is used as an application backend, it is possible that an application user can crash the SurrealDB instance and thus the supported application through crafted inputs that exploit this attack vector. ### Patches A patch has been introduced that ensures the error is caught and converted as an error. - Versions 2.2.2, 2.1.5 and 2.0.5 and later are not affected by this isssue ### Workarounds Affected users who are unable to update may want to limit the ability of untrusted clients to run arbitrary queries ...