CVE Vulnerabilities

CVE-2025-27606

Exposure of Data Element to Wrong Session

Published: Mar 14, 2025 | Modified: Mar 14, 2025
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
RedHat/V2
RedHat/V3
Ubuntu

Element Android is an Android Matrix Client provided by Element. Element Android up to version 1.6.32 can, under certain circumstances, fail to logout the user if they input the wrong PIN more than the configured amount of times. An attacker with physical access to a device can exploit this to guess the PIN. Version 1.6.34 solves the issue.

Weakness

The product does not sufficiently enforce boundaries between the states of different sessions, causing data to be provided to, or used by, the wrong session.

Extended Description

Data can “bleed” from one session to another through member variables of singleton objects, such as Servlets, and objects from a shared pool. In the case of Servlets, developers sometimes do not understand that, unless a Servlet implements the SingleThreadModel interface, the Servlet is a singleton; there is only one instance of the Servlet, and that single instance is used and re-used to handle multiple requests that are processed simultaneously by different threads. A common result is that developers use Servlet member fields in such a way that one user may inadvertently see another user’s data. In other words, storing user data in Servlet member fields introduces a data access race condition.

Potential Mitigations

References