Quantum Secular Labs / Blog / Advisories

CVE-2018-11466: Specially crafted network packets sent to port 102/tcp (ISO-TSAP) could allow a remote attacker to either…

CVE-2018-11466 is rated critical with a CVSS v3.0 base score of 9.8 and NVD lists 5 affected products, including Siemens Sinumerik 808d V4.7 Firmware. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

A vulnerability has been identified in SINUMERIK 808D V4.7 (All versions), SINUMERIK 808D V4.8 (All versions), SINUMERIK 828D V4.7 (All versions < V4.7 SP6 HF1), SINUMERIK 840D sl V4.7 (All versions < V4.7 SP6 HF5), SINUMERIK 840D sl V4.8 (All versions < V4.8 SP3). Specially crafted network packets sent to port 102/tcp (ISO-TSAP) could allow a remote attacker to either cause a Denial-of-Service condition of the integrated software firewall or allow to execute code in the context of the software firewall. The security vulnerability could be exploited by an attacker with network access to the affected systems on port 102/tcp. Successful exploitation requires no user privileges and no user interaction. The vulnerability could allow an attacker to compromise confidentiality, integrity and availability of the system. At the time of advisory publication no public exploitation of this security vulnerability was known

Severity breakdown

CVSS v3.0 9.8: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-248: Uncaught Exception

An exception is thrown from a function, but it is not caught.

Affected products

  • Siemens Sinumerik 808d V4.7 Firmware: all versions listed by NVD
  • Siemens Sinumerik 808d V4.8 Firmware: all versions listed by NVD
  • Siemens Sinumerik 840d Sl V4.7 Firmware: up to and including 4.7
  • Siemens Sinumerik 840d Sl V4.8 Firmware: up to and including 4.8
  • Siemens Sinumerik 828d V4.7 Firmware: up to and including 4.7

References