Authentication bypass in Trend Micro IM Security

1) Improper Authentication

EUVDB-ID: #VU52959

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-31520

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to usage of weak and predictable session token. A remote attacker can guess administrator's session token and gain full access to the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Instant Messaging Security: before 1.6.5 CP3 b1267

External links

http://success.trendmicro.com/solution/000286439

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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