Use of a broken or risky cryptographic algorithm in Beckhoff TwinCAT
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2017-16718 |
| CWE-ID | CWE-327 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
TwinCAT Client/Desktop applications / Software for system administration |
| Vendor | Beckhoff |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Use of a broken or risky cryptographic algorithm
EUVDB-ID: #VU36998
Risk: Medium
CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-16718
CWE-ID:
CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
Exploit availability: No
DescriptionThe vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
Beckhoff TwinCAT 3 supports communication over ADS. ADS is a protocol for industrial automation in protected environments. This protocol uses user configured routes, that can be edited remotely via ADS. This special command supports encrypted authentication with username/password. The encryption uses a fixed key, that could be extracted by an attacker. Precondition of the exploitation of this weakness is network access at the moment a route is added.
MitigationInstall update from vendor's website.
Vulnerable software versionsTwinCAT: 3.0
External linkshttp://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2017-002.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.
