Vulnerability identifier: #VU49500

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-15800

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SCALANCE X-300
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Siemens

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the web server. A remote attacker can send a specially crafted request, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SCALANCE X-300: All versions

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External links
http://cert-portal.siemens.com/productcert/pdf/ssa-139628.pdf

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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.