Information disclosure in Nextcloud Android Talk



Published: 2022-03-14
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-41181
CWE-ID CWE-288
Exploitation vector Local
Public exploit N/A
Vulnerable software
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Nextcloud Android Talk
Client/Desktop applications / Messaging software

Vendor

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Authentication bypass using an alternate path or channel

EUVDB-ID: #VU61279

Risk: Low

CVSSv3.1: 2.1 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-41181

CWE-ID: CWE-288 - Authentication Bypass Using an Alternate Path or Channel

Exploit availability: No

Description

The vulnerability allows a local attacker to gain access to potentially sensitive information.

The vulnerability exists due to the affected application does not properly detect the lockscreen state when a call is incoming. An attacker with physical access to the locked phone can gain access to the chat messages and files of the user.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Nextcloud Android Talk: before 12.3.0

External links

http://github.com/nextcloud/security-advisories/security/advisories/GHSA-497c-c8hx-6qcf
http://github.com/nextcloud/talk-android/pull/1585


Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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