CVSS: 6.5EPSS: 0%CPEs: 3EXPL: 1CVE-2022-24741 – High memory usage in Nextcloud server
https://notcve.org/view.php?id=CVE-2022-24741
Nextcloud server is an open source, self hosted cloud style services platform. In affected versions an attacker can cause a denial of service by uploading specially crafted files which will cause the server to allocate too much memory / CPU. It is recommended that the Nextcloud Server is upgraded to 21.0.8 , 22.2.4 or 23.0.1. Users unable to upgrade should disable preview generation with the `'enable_previews'` config flag. El servidor Nextcloud es una plataforma de servicios de código abierto, de estilo de nube autoalojada. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jf3h-xf4q-mh89 https://github.com/nextcloud/server/pull/30291 https://hackerone.com/reports/1261225 https://security.gentoo.org/glsa/202208-17 • CWE-400: Uncontrolled Resource Consumption CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 4.3EPSS: 0%CPEs: 3EXPL: 0CVE-2021-41241 – Advanced permissions is not respected for subfolders in Nextcloud server
https://notcve.org/view.php?id=CVE-2021-41241
Nextcloud server is a self hosted system designed to provide cloud style services. The groupfolders application for Nextcloud allows sharing a folder with a group of people. In addition, it allows setting "advanced permissions" on subfolders, for example, a user could be granted access to the groupfolder but not specific subfolders. Due to a lacking permission check in affected versions, a user could still access these subfolders by copying the groupfolder to another location. It is recommended that the Nextcloud Server is upgraded to 20.0.14, 21.0.6 or 22.2.1. • https://github.com/nextcloud/groupfolders/issues/1692 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-m4wp-r357-4q94 https://github.com/nextcloud/server/pull/29362 https://security.gentoo.org/glsa/202208-17 • CWE-862: Missing Authorization CWE-863: Incorrect Authorization •
CVSS: 5.3EPSS: 0%CPEs: 3EXPL: 0CVE-2021-41239 – User enumeration setting not respected in Nextcloud server
https://notcve.org/view.php?id=CVE-2021-41239
Nextcloud server is a self hosted system designed to provide cloud style services. In affected versions the User Status API did not consider the user enumeration settings by the administrator. This allowed a user to enumerate other users on the instance, even when user listings where disabled. It is recommended that the Nextcloud Server is upgraded to 20.0.14, 21.0.6 or 22.2.1. There are no known workarounds. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-g722-cm3h-8wrx https://github.com/nextcloud/server/issues/27122 https://github.com/nextcloud/server/pull/29260 https://security.gentoo.org/glsa/202208-17 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE-862: Missing Authorization •
CVSS: 8.1EPSS: 0%CPEs: 3EXPL: 0CVE-2021-41177 – Rate-limits not working on instances without configured memory cache backend
https://notcve.org/view.php?id=CVE-2021-41177
Nextcloud is an open-source, self-hosted productivity platform. Prior to versions 20.0.13, 21.0.5, and 22.2.0, Nextcloud Server did not implement a database backend for rate-limiting purposes. Any component of Nextcloud using rate-limits (as as `AnonRateThrottle` or `UserRateThrottle`) was thus not rate limited on instances not having a memory cache backend configured. In the case of a default installation, this would notably include the rate-limits on the two factor codes. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5, or 22.2.0. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fj39-4qx4-m3f2 https://github.com/nextcloud/server/pull/28728 https://hackerone.com/reports/1265709 https://security.gentoo.org/glsa/202208-17 • CWE-799: Improper Control of Interaction Frequency •
CVSS: 10.0EPSS: 0%CPEs: 3EXPL: 0CVE-2021-32802 – Preview generation used third-party library not suited for user-generated content in Nextcloud server
https://notcve.org/view.php?id=CVE-2021-32802
Nextcloud server is an open source, self hosted personal cloud. Nextcloud supports rendering image previews for user provided file content. For some image types, the Nextcloud server was invoking a third-party library that wasn't suited for untrusted user-supplied content. There are several security concerns with passing user-generated content to this library, such as Server-Side-Request-Forgery, file disclosure or potentially executing code on the system. The risk depends on your system configuration and the installed library version. • https://docs.nextcloud.com/server/21/admin_manual/configuration_files/previews_configuration.html#disabling-previews https://github.com/nextcloud/security-advisories/security/advisories/GHSA-m682-v4g9-wrq7 https://hackerone.com/reports/1261413 https://security.gentoo.org/glsa/202208-17 • CWE-829: Inclusion of Functionality from Untrusted Control Sphere •