Remote code execution in Siemens RUGGEDCOM ROX products

1) Heap-based buffer overflow

EUVDB-ID: #VU58477

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-2021-43527

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error when handling DER-encoded DSA or RSA-PSS signatures. A remote attacker can send specially crafted signatures encoded within CMS, S/MIME, PKCS #7, or PKCS #12 to the application, 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 update from vendor's website.

Vulnerable software versions

RUGGEDCOM ROX RX5000: 2.10.0

RUGGEDCOM ROX RX1536: 2.10.0

RUGGEDCOM ROX RX1524: 2.10.0

RUGGEDCOM ROX RX1512: 2.10.0

RUGGEDCOM ROX RX1511: 2.10.0

RUGGEDCOM ROX RX1510: 2.10.0

RUGGEDCOM ROX RX1501: 2.10.0

RUGGEDCOM ROX RX1500: 2.10.0

RUGGEDCOM ROX RX1400: 2.10.0

RUGGEDCOM ROX MX5000: 2.10.0

External links

http://cert-portal.siemens.com/productcert/txt/ssa-594438.txt

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.