Vulnerability identifier: #VU16674

Vulnerability risk: Low

CVSSv3.1: 3.7 [CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-3986

CWE-ID: CWE-200

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Telegram for Android
Mobile applications / Apps for mobile phones

Vendor: Telegram

Description

The vulnerability allows a local high-privileged attacker to obtain potentially sensitive information.

The vulnerability exists in the "Secret Chats" functionality of the Telegram Android messaging application due to leaving of behind photos taken and shared on the secret chats, even after the chats are deleted. A local attacker can gain access to potentially sensitive information from all applications installed on the Android device.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Telegram for Android: 4.9.0

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External links
http://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0654

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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