2 Advisories Published – 12-17-19

Today the CISA NCCIC-ICS published two control system security blogs for products from Siemens and GE.

Siemens Advisory

This advisory describes 54 vulnerabilities in the Siemens SPPA-T3000 servers. The vulnerabilities were reported by Gleb Gritsai, Eugenie Potseluevskaya, Sergey Andreev, and Radu Motspan from Kaspersky Lab; Vyacheslav Moskvin, and Ivan B from Positive Technologies; and Can Demirel from Biznet Bilisim Sistemleri ve Danışmanlık. Siemens has an update that mitigates three of the vulnerabilities on one of the affected products. There is no indication that any of the researchers have been provided an opportunity to verify the efficacy of the fix.

Sorry, I am not going to list the 54 vulnerabilities.

NCCIC-ICS reports that a relatively low-skilled attacker could remotely exploit these vulnerabilities to allow an attacker to execute arbitrary code on the server, cause a denial-of-service condition, view and modify passwords, gain root privileges, access sensitive information, and read and write arbitrary files on the local system.

NOTE: This is the new vulnerability of the Siemens monthly drop from last week. I briefly discussed these vulnerabilities last Saturday.

GE Advisory

This advisory describes a cross-site scripting vulnerability in the GE S2020/S2020G Fast Switch 61850, a managed Ethernet switch. The vulnerability was reported by Murat Aydemir of Biznet Bilisim A.S.. GE has a new version that mitigates the vulnerability. There is no indication that Aydemir has been provided an opportunity to verify the efficacy of the fix.

NCCIC-ICS reports that a relatively low-skilled attacker could remotely exploit the vulnerability to allow an attacker to inject arbitrary code and allow disclosure of sensitive data.

One Advisory Published – 02-26-19

Today the DHS NCCIC-ICS published a control system security advisory for products from Moxa. The advisory describes ten vulnerabilities in the Moxa IKS and EDS industrial switches. The vulnerabilities were reported by Ivan B, Sergey Fedonin, and Vyacheslav Moskvin of Positive Technologies Security. Moxa has a firmware patch that mitigates the vulnerabilities. There is no indication that the researchers have been provided an opportunity to verify the efficacy of the fix.

The ten reported vulnerabilities are:

• Classic buffer overflow - CVE-2019-6557;

• Cross-site request forgery - CVE-2019-6561;

• Cross-site scripting - CVE-2019-6565;

• Improper access control - CVE-2019-6520;

• Improper restriction of excessive authentication request - CVE-2019-6524;

• Missing encryption of sensitive data - CVE-2019-6526;

• Out-of-bounds read - CVE-2019-6522;

• Unprotected storage of credentials - CVE-2019-6518;

• Predictable from observable state - CVE-2019-6563; and

• Uncontrolled resource consumption - CVE-2019-6559

NCCIC-ICS reports that a relatively low-skilled attacker could remotely exploit these vulnerabilities to allow the reading of sensitive information, remote code execution, arbitrary configuration changes, authentication bypass, sensitive data capture, reboot of the device, device crash, or full compromise of the device.