CVE-2021-25397 : Vulnerability Insights and Analysis
Learn about CVE-2021-25397, an improper access control vulnerability in Samsung Mobile Devices allowing local attackers to write arbitrary files via untrusted applications. Find out the impact, affected systems, and mitigation steps.
An improper access control vulnerability in TelephonyUI prior to SMR MAY-2021 Release 1 allows local attackers to write arbitrary files of telephony process via untrusted applications.
Understanding CVE-2021-25397
This CVE impacts Samsung Mobile Devices and raises serious concerns about the security of the telephony process.
What is CVE-2021-25397?
The vulnerability in the TelephonyUI component allows local attackers to write arbitrary files via untrusted apps in Samsung Mobile Devices prior to SMR MAY-2021 Release 1.
The Impact of CVE-2021-25397
With a CVSS base score of 6.8, this medium-severity vulnerability has a high integrity impact but low availability impact. It requires no user interaction and affects confidentiality to none.
Technical Details of CVE-2021-25397
This section delves into the specifics of the vulnerability in terms of description, affected systems, versions, and exploitation mechanism.
Vulnerability Description
The vulnerability arises from improper access control in TelephonyUI, enabling attackers to write arbitrary files in the telephony process.
Affected Systems and Versions
Samsung Mobile Devices running versions P(9.0), Q(10.0), and R(11.0) before SMR MAY-2021 Release 1 are impacted by this vulnerability.
Exploitation Mechanism
Local attackers can exploit this vulnerability through untrusted applications to write arbitrary files, potentially leading to unauthorized access.
Mitigation and Prevention
Understanding how to mitigate and prevent the exploitation of CVE-2021-25397 is crucial for maintaining the security of Samsung Mobile Devices.
Immediate Steps to Take
Users are advised to update their devices to SMR MAY-2021 Release 1 or later to mitigate the vulnerability. Avoiding untrusted applications can also help reduce the risk of exploitation.
Long-Term Security Practices
Implementing strong security measures, such as vetting app permissions and regularly updating devices, can prevent similar vulnerabilities in the future.
Patching and Updates
Samsung Mobile provides security updates regularly. Ensure your device is always updated with the latest security patches to safeguard against known vulnerabilities.