#perl

Synapse before 1.52.0 with URL preview functionality enabled will attempt to generate URL previews for media stream URLs without properly limiting connection time. Connections will only be terminated after `max_spider_size` (default: 10M) bytes have been downloaded, which can in some cases lead to long-lived connections towards the streaming media server (for instance, Icecast). This can cause excessive traffic and connections toward such servers if their stream URL is, for example, posted to a large room with many Synapse instances with URL preview enabled. Version 1.52.0 implements a timeout mechanism which will terminate URL preview connections after 30 seconds. Since generating URL previews for media streams is not supported and always fails, 1.53.0 additionally implements an allow list for content types for which Synapse will even attempt to generate a URL preview. Upgrade to 1.53.0 to fully resolve the issue. As a workaround, turn off URL preview functionality by setting `url_pre...

Use After Free vulnerability in Linux Kernel allows Privilege Escalation. An improper Update of Reference Count in io_uring leads to Use-After-Free and Local Privilege Escalation. When io_msg_ring was invoked with a fixed file, it called io_fput_file() which improperly decreased its reference count (leading to Use-After-Free and Local Privilege Escalation). Fixed files are permanently registered to the ring, and should not be put separately. We recommend upgrading past commit https://github.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679 https://github.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679

An issue was discovered in Appalti & Contratti 9.12.2. It allows Session Fixation. When a user logs in providing a JSESSIONID cookie that is issued by the server at the first visit, the cookie value is not updated after a successful login.

### Impact User without the right to view documents can deduce their existence by repeated Livetable queries. #### Reproduction steps 1. Restrict "view" access to `Sandbox.TestPage3` by setting an explicit view right for admins 1. As a user who is not an admin, open `<server>/bin/get/XWiki/LiveTableResults?outputSyntax=plain&classname=&collist=doc.title%2Cdoc.location%2Cdoc.content&doc.title=Sandbo&doc.location=Sandbox.TestPage3&doc.content=dummy&limit=0` where `<server>` is the URL of your XWiki installation. #### Expect Result: No results are displayed as the user doesn't have view rights on Sandbox.TestPage3. ##### Actual Result: The result ```json { "reqNo": null, "matchingtags": {}, "tags": [], "totalrows": 1, "returnedrows": 0, "offset": 1, "rows": [ { "doc_viewable": false, "doc_fullName": "obfuscated" } ] } ``` is displayed. This reveals that a document `Sandbox.TestPage3` exists (we explicitly searched for this name) which has a ti...

### Impact We discovered that when the reset a forgotten password feature of XWiki was used, the password was then stored in plain text in database. This only concerns XWiki 13.1RC1 and next versions. Note that it only concerns the reset password feature available from the "Forgot your password" link in the login view: the features allowing a user to change their password, or for an admin to change a user password are not impacted. This vulnerability is particularly dangerous in combination with other vulnerabilities allowing to perform data leak of personal data from users, such as https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-599v-w48h-rjrm. Note that this vulnerability only concerns the users of the main wiki: in case of farms, the users registered on subwiki are not impacted thanks to a bug we discovered when investigating this. ### Patches The problem has been patched in version 14.6RC1, 14.4.3 and 13.10.8. The patch involves a migration of the impacted u...

### Impact In certain scenario a malicious immudb server can provide a falsified proof that will be accepted by the client SDK signing a falsified transaction replacing the genuine one. This situation can not be triggered by a genuine immudb server and requires the client to perform a specific list of verified operations resulting in acceptance of an invalid state value. This vulnerability only affects immudb client SDKs, the immudb server itself is not affected by this vulnerability. ### Detailed description immudb uses Merkle Tree enhanced with additional linear part to perform consistency proofs between two transactions. The linear part is built from the last leaf node of the Merkle Tree compensating for transactions that were not yet consumed by the Merkle Tree calculation. The Merkle Tree part is then used to perform proofs for things that are in transaction range covered by the Merkle Tree where the linear part is used to check those that are not yet in the Merkle Tree. Whe...

Silverstripe silverstripe/framework through 4.11 allows XSS (issue 2 of 3).

Ubuntu Security Notice 5733-1 - It was discovered that FLAC was not properly performing memory management operations, which could result in a memory leak. An attacker could possibly use this issue to cause FLAC to consume resources, leading to a denial of service. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM and Ubuntu 18.04 LTS. It was discovered that FLAC was not properly performing bounds checking operations when decoding data. If a user or automated system were tricked into processing a specially crafted file, an attacker could possibly use this issue to expose sensitive information or to cause FLAC to crash, leading to a denial of service. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.

This is a whitepaper along with a proof of concept eml file discussing CVE-2020-16947 where a remote code execution vulnerability exists in Microsoft Outlook 2019 version 16.0.13231.20262 when it fails to properly handle objects in memory.

This is a whitepaper discussing CVE-2020-1349 where a remote code execution vulnerability exists in Microsoft Outlook 2019 version 16.0.12624.20424 when it fails to properly handle objects in memory.