#VU52352 Cleartext transmission of sensitive information in DiskStation Manager (DSM) - CVE-2021-26564


Vulnerability identifier: #VU52352

Vulnerability risk: Medium

CVSSv4.0: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-26564

CWE-ID: CWE-319

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
DiskStation Manager (DSM)
Server applications / File servers (FTP/HTTP)

Vendor: Synology Inc.

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to software uses insecure communication channel to transmit sensitive information in synorelayd. A remote attacker can perform a man-in-the-middle attack to spoof servers via an HTTP session.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

DiskStation Manager (DSM): 6.2.3 25426-2


External links
https://www.synology.com/security/advisory/Synology_SA_20_26
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1160


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.


Latest bulletins with this vulnerability