Vulnerability · Published Jan 26, 2022 · Assigned by GitHub_M

CVE-2021-41166Permission bypass in Nextcloud Android App

Medium 4.3

In plain English

A medium-severity incorrect default permissions in security-advisories from nextcloud. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 61% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.9%top 38.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. An issue in versions prior to 3.17.1 may lead to sensitive information disclosure. An unauthorized app that does not have the otherwise required `MANAGE_DOCUMENTS` permission may view image thumbnails for images it does not have permission to view. Version 3.17.1 contains a patch. There are no known workarounds.

Affected products (as reported)

Vendor	Product	Versions
nextcloud	security-advisories	< 3.17.1

Weakness: CWE-276 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

https://hackerone.com/reports/1358597 x_refsource_MISC
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wrwg-jwpg-r3c4 x_refsource_CONFIRM
https://github.com/nextcloud/android/commit/aa47197109970b8449c4e44601eba36e3481b086 x_refsource_MISC
https://github.com/nextcloud/android/commit/b6ecf515b38c2d82d32743f27236534f3e03ee0c x_refsource_MISC