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CVE-2021-32656

Status Candidate

Overview

Nextcloud Server is a Nextcloud package that handles data storage. A vulnerability in federated share exists in versions prior to 19.0.11, 20.0.10, and 21.0.2. An attacker can gain access to basic information about users of a server by accessing a public link that a legitimate server user added as a federated share. This happens because Nextcloud supports sharing registered users with other Nextcloud servers, which can be done automatically when selecting the "Add server automatically once a federated share was created successfully" setting. The vulnerability is patched in versions 19.0.11, 20.0.10, and 21.0.2 As a workaround, disable "Add server automatically once a federated share was created successfully" in the Nextcloud settings.

Related Files

Gentoo Linux Security Advisory 202208-17
Posted Aug 11, 2022
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202208-17 - Multiple vulnerabilities have been found in Nextcloud, the worst of which could result in denial of service. Versions less than 23.0.4 are affected.

tags | advisory, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2021-32653, CVE-2021-32654, CVE-2021-32655, CVE-2021-32656, CVE-2021-32657, CVE-2021-32678, CVE-2021-32679, CVE-2021-32680, CVE-2021-32688, CVE-2021-32703, CVE-2021-32705, CVE-2021-32725, CVE-2021-32726, CVE-2021-32734
SHA-256 | c69af16218621a3f77f3c2b2373b447bda23b4a8331cfede05cc8ed67f5e8034
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