Path traversal in Siemens Siveillance Video DLNA Server

1) Path traversal

EUVDB-ID: #VU58195

Risk: High

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-42021

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Siveillance Video DLNA Server 2019 R1: All versions

Siveillance Video DLNA Server 2019 R2: All versions

Siveillance Video DLNA Server 2019 R3: All versions

Siveillance Video DLNA Server 2020 R1: All versions

Siveillance Video DLNA Server 2020 R2: All versions

Siveillance Video DLNA Server 2020 R3: All versions

Siveillance Video DLNA Server 2021 R1: All versions

CPE2.3

• cpe:2.3:a:siemens:siveillance_video_dlna_server_2019_r1:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:siveillance_video_dlna_server_2019_r2:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:siveillance_video_dlna_server_2019_r3:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:siveillance_video_dlna_server_2020_r1:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:siveillance_video_dlna_server_2020_r2:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:siveillance_video_dlna_server_2020_r3:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:siveillance_video_dlna_server_2021_r1:*:*:*:*:*:*:*:*

External links

https://cert-portal.siemens.com/productcert/pdf/ssa-755517.pdf

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.