2 Advisories Published – 2-13-20

Today the CISA NCCIC-ICS published two control system security advisories for products from Schneider Electric.

Magelis HMI Panel Advisory

This advisory describes an improper check for unusual or exceptional conditions vulnerability in the Schneider Magelis HMI Panel. The vulnerability was reported by VAPT Team, C3i Center. Schneider has provided generic workarounds to mitigate the vulnerability.

NCCIC-ICS reports that a relatively low-skilled attacker could remotely exploit the vulnerability to allow a denial-of-service condition.

NOTE: I briefly discussed this vulnerability last August.

Modicon Ethernet Serial RTU Advisory

This advisory describes three vulnerabilities in the Schneider Modicon BMXNOR0200H Ethernet/Serial RTU module. The vulnerability was reported by VAPT Team, C3i Center. Schneider has provided generic workarounds to mitigate the vulnerability.

The three reported vulnerabilities are:

• Improper check for unusual or exception conditions (2) - CVE-2019-6813 and CVE-2019-6831; and

• Improper access control - CVE-2019-6810

NCCIC-ICS reports that a relatively low-skilled attacker could remotely exploit these vulnerabilities to allow remote code execution or cause a denial-of-service condition.

NOTE: I briefly discussed this vulnerability last August.

Other Schneider Advisories

While NCCIC-ICS was covering these two 5-month old vulnerability reports, Schneider was publishing three new advisories this week. I will cover them this weekend.

13 Advisories and 5 Updates Published – 2-11-20

Today the CISA NCCIC-ICS published 13 control system security advisories for products from Synergy Systems and Solutions, Digi International and Siemens (11). They also updated five control system security advisories for products from Siemens.

Synergy Systems Advisory

This advisory describes two vulnerabilities in the SSS HUSKY RTU. The vulnerabilities were reported by VAPT Team, C3i Center. SSS has a new version that mitigates the vulnerabilities. There is no indication that the researchers have been provided an opportunity to verify the efficacy of the fix.

The two reported vulnerabilities are:

• Improper authentication - CVE-2019-20046; and

• Improper input validation - CVE-2019-20045

NCCIC-ICS reports that a relatively low-skilled attacker could remotely exploit these vulnerabilities to allow an attacker to read sensitive information, execute arbitrary code, or cause a denial-of-service condition.

Digi Advisory

This advisory describes two vulnerabilities in the Digi ConnectPort LTS 32 MEI. The vulnerabilities were reported by Murat Aydemir and Fatih Kayran of Biznet Bilisim. Digi has a new release that mitigates the vulnerabilities. There is no indication that the researchers have been provided with an opportunity to verify the efficacy of the fix.

The two reported vulnerabilities are:

• Unrestricted upload of file with dangerous type - CVE-2020-6975; and

• Cross-site scripting - CVE-2020-6973

NCCIC-ICS reports that a relatively low-skilled attacker could remotely exploit the vulnerability to limit system availability.

SIPROTEC Advisory

This advisory describes an improper input validation vulnerability in the Siemens SIPROTEC 4 and SIPROTEC Compact. The vulnerability was reported by Tal Keren from Claroty. Siemens has provided generic workarounds to mitigate the vulnerability.

NCCIC-ICS reports that an uncharacterized attacker could remotely exploit the vulnerability to conduct a denial-of-service attack over the network.

SIMATIC S7-1500 Advisory

This advisory describes a resource exhaustion vulnerability in the Siemens SIMATIC S7-1500 CPU family. The vulnerability is self-reported. Siemens has provided generic workarounds to mitigate the vulnerability.

NCCIC-ICS reports that an uncharacterized attacker could remotely exploit the vulnerability to conduct denial-of-service attacks.

SCALANCE S-600 Advisory

This advisory describes three vulnerabilities in the Siemens SCALANCE S-600 Firewall. One of the vulnerabilities was reported by Melih Berk Ekşioğlu. Siemens has provided generic workarounds to mitigate the vulnerability.

The three reported vulnerabilities are:

• Cross-site scripting - CVE-2019-6585; and

• Uncontrolled resource consumption (2) - CVE-2019-13925 and CVE-2019-13926

NCCIC-ICS reports that an uncharacterized attacker could remotely exploit the vulnerability to conduct denial-of-service or cross-site scripting attacks. User interaction is required for a successful exploitation of the cross-site-scripting attack.

OZW Web Server Advisory

This advisory describes and information disclosure vulnerability in the Siemens OZW web server. The vulnerability was reported by Maxim Rupp. Siemens has a new version that mitigates the vulnerability. There is no indication that Maxim has been provided an opportunity to verify the efficacy of the fix.

NCCIC-ICS reports that a relatively low-skilled attacker could remotely exploit this vulnerability to allow unauthenticated users to access project files.

SIPORT Advisory

This advisory describes an insufficient logging vulnerability in the Siemens SIPORT MP. The vulnerability is self-reported. Siemens has a new version that mitigates the vulnerability.

NCCIC-ICS reports that a relatively low-skilled attacker could remotely exploit the vulnerability to allow the attacker to create special accounts with administrative privileges.

SCALANCE Advisory

This advisory describes a protection mechanism failure vulnerability in the Siemens SCALANCE X switches. The vulnerability is self-reported. Siemens has updates that mitigate the vulnerability.

NCCIC-ICS reports that a relatively low-skilled attacker could remotely exploit this vulnerability to allow an attacker to perform administrative actions.

SIMATIC PCS 7 Advisory

This advisory describes an incorrect calculation of buffer size vulnerability in the Siemens SIMATIC PCS 7, SIMATIC WinCC, SIMATIC NET PC products. The vulnerability was reported by Nicholas Miles from Tenable. Siemens has new versions that mitigate the vulnerability. There is no indication that Miles 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 with network access to cause a denial-of-service condition.

SIMATIC S7 Advisory

This advisory describes a resource exhaustion vulnerability in the Siemens SIMATIC S7 devices. The vulnerability was reported by China Industrial Control Systems Cyber Emergency Response Team. Siemens has a new version that mitigates the vulnerability. There is no indication that the researchers were provided an opportunity to verify the efficacy of the fix.

NCCIC-ICS reports that a relatively low-skilled attacker could remotely exploit this vulnerability to allow remote attackers to perform a denial-of-service attack by sending a specially crafted HTTP request to the web server of an affected device.

PROFINET Advisory

This advisory describes a resource exhaustion vulnerability in the Siemens PROFINET-IO Stack. The vulnerability was reported by Yuval Ardon and Matan Dobrushin of OTORIO. Siemens has updates that mitigate the vulnerability. There is no indication that the researchers have been provided an opportunity to verify the efficacy of the fix.

NCCIC-ICS reports that a relatively low-skilled attacker could remotely exploit this vulnerability to lead to a denial-of-service condition.

NOTE: OTORIO reports that this same vulnerability is found in multiple vendor products including the Moxa EDS Ethernet Switches.

SIMATIC CP Advisory

This advisory describes two vulnerabilities in the Siemens SIMATIC CP 1543-1. The vulnerabilities are self-reported. Siemens has a new version that mitigates the vulnerabilities.

The two reported vulnerabilities are:

• Improper access control - CVE-2019-12815; and

• Loop with unreachable exit condition - CVE-2019-18217

NCCIC-ICS reports that a relatively low-skilled attacker could remotely exploit these vulnerabilities to allow for remote code execution and information disclosure without authentication, or unauthenticated denial of service.

Industrial Products Advisory

This advisory describes two vulnerabilities in the Siemens SCALANCE, SIMATIC, SIPLUS products. The vulnerabilities were reported by Artem Zinenko of Kaspersky Lab. Siemens has new versions that mitigate the vulnerabilities. There is no indication that Zinenko has been provided an opportunity to verify the efficacy of the fix.

The two reported vulnerabilities are:

• Data processing errors - CVE-2015-5621; and

• Null pointer dereference - CVE-2018-18065

NCCIC-ICS reports that a relatively low-skilled attacker could remotely exploit these vulnerabilities to allow remote attackers to conduct a denial-of-service attack by sending specially crafted packets to Port 161/UDP (SNMP).

SIMOCODE Update

This update provides additional information on an advisory that was originally published on March 9th, 2019 and most recently updated on January 14^th, 2020. The new information includes the addition of two affected products:

• SITOP PSU8600; and

• TIM 1531 IRC

Industrial Products w/OPC UA Update

This update provides additional information on an advisory that was originally published on April 9th, 2019 and most recently updated on January 14^th, 2020. The new information includes updated affected version data and mitigation links for SIMATIC NET PC Software.

PROFINET Update

This update provides additional information on an advisory that was originally published on October 10^th, 2019 and most recently updated on January 14^th, 2020. The new information includes updated affected version data and mitigation links for SINAMICS DCP.

Industrial Real Time Devices Update

This update provides additional information on an advisory that was originally published on October 10^th, 2019 and most recently updated on January 14^th, 2020. The new information includes updated affected version data and mitigation links for SINAMICS DCP.

SIMATIC Update

This update provides additional information on an advisory that was originally published on December 10th, 2019. The new information includes updated affected version data and mitigation links for:

• TIM 1531 IRC;

• SIMATIC NET PC Software

Other Siemens Advisories and Updates

Siemens also published two additional advisories and 3 updates yesterday that have not yet been addressed by NCCIC-ICS.

Additionally, on Monday Siemens published updates of 58 previously published advisories. All of these updates were adding references to the SIPLUS device variants as affected products. Siemens has been adding references to this as they have been updating advisories for the last couple of months, so it looks like they are just doing the final house cleaning on the issue. I do not expect NCCIC-ICS to update all of their applicable advisories.

2 Advisories Published – 10-17-19

Today the DHS NCCIC-ICS published two control system security advisories for products from Horner Automation and AVEVA.

Horner Advisory

This advisory describes two vulnerabilities in the Horner Cscape control system application programming software. The vulnerabilities were reported by Francis Provencher of Protek Research Lab via the Zero Day Initiative. Horner has a new version that mitigates the vulnerabilities. There is no indication that Provencher has been provided an opportunity to verify the efficacy of the fix.

The two reported vulnerabilities are:

• Improper input validation - CVE-2019-13541; and

• Out-of-bounds write - CVE-2019-13545

NCCIC-ICS reports that a relatively low-skilled attacker with uncharacterized access could exploit the vulnerabilities to crash the device being accessed, which may allow the attacker to access information and execute arbitrary code.

AVEVA Advisory

This advisory describes a stack-based overflow vulnerability in the AVEVA Vijeo Citect and Citect SCADA. The vulnerability is in the IEC870IP driver. The vulnerability was reported by VAPT Team, C3i Center. AVEVA has a new version of the driver that mitigates the vulnerability. There is no indication that the researchers have been provided an opportunity to verify the efficacy of the fix.

NCCIC-ICS reports that a relatively low-skilled attacker could remotely exploit this vulnerability to cause a server-side crash.

Public ICS Disclosures – Week of 08-10-19

This week we have eight vendor notifications from Schneider (7) and Siemens; updates for four previouls published advisories from Schneider (2) and Siemens (2); as well as two exploit reports for previously published vulnerabilities in products from Wind River, and Cisco.

Schneider Advisories

Magelis Advisory

Schneider published an advisory describing an improper check for unusual or exceptional conditions vulnerability in their Magelis HMI Panel products. The vulnerability was reported by VAPT Team. Schneider provides generic workarounds to mitigate the vulnerability. There is no indication that the researchers have been provided an opportunity to verify the efficacy of the fix.

Modicon 340 Advisory

Schneider published an advisory describing an improper check for unusual or exceptional conditions vulnerability in their Modicon M340 controllers. The vulnerability was reported by VAPT Team. Schneider provides generic workarounds to mitigate the vulnerability. There is no indication that the researchers have been provided an opportunity to verify the efficacy of the fix.

Modicon Advisory

Schneider published an advisory describing three improper check for unusual or exceptional conditions vulnerabilities in their Modicon Ethernet / Serial RTU Modules. The vulnerability was reported by VAPT Team. Schneider provides generic workarounds to mitigate the vulnerability. There is no indication that the researchers have been provided an opportunity to verify the efficacy of the fix.

SoMachine Advisory

Schneider published an advisory describing an untrusted search path vulnerability in their SoMachine HVAC. The vulnerability was reported by Yongjun Liu of the nsfocus security team. Schneider has a new version that mitigates the vulnerability. There is no indiction that Yonguin has been provided an opportunity to verify the efficacy of the fix.

TelevisGo Advisory

Schneider published an advisory describing 22 vulnerabilities in the third party UltraVNC (remote accesss) software component embedded within the TelevisGo product. The vulnerabilities were reported by Kaspersky Labs. Schneider has a hot-fix available that mitigates the vulnerability. There is no indication that the researchers have been provided an opportunity to verify the efficacy of the fix.

The 22 reported vulnerabilities are:

• Buffer errors (9) - CVE-2019-8258, CVE-2018-15361, CVE-2019-8262, CVE-2019-8263, CVE-2019-8269, CVE-2019-8271, CVE-2019-8273, CVE-2019-8274, and CVE-2019-8276;

• Resource management errors (2) - CVE-2019-8259, and CVE-2019-8277;

• Out-of-bounds read (8) - CVE-2019-8260, CVE-2019-8261, CVE-2019-8280, CVE-2019-8264, CVE-2019-8265, CVE-2019-8266, CVE-2019-8267, and CVE-2019-8270;

• Incorrect calculation (2) - CVE-2019-8268, CVE-2019-8272; and

• Improper access control - CVE-2019-8275.

Software Update Service Advisory

Schneider published an advisory describing a deserialization of trusted data vulnerability in their Software Update (SESU) SUT Service. The vulnerability was reported by Amir Preminger of Claroty. Schneider has a new version that mitigates the vulnerability. There is no indication that Preminger has been provided an opportunity to verify the efficacy of the fix.

spaceLYnk Advisory

Schneider published an advisory describing an authentication vulnerability in their  spaceLYnk and Wiser for KNX controllers. The vulnerability was reported by Sumedt Jitpukdebodin. Schneider has new versions that mitigate the vulnreabilty. There is no indication that Jitpukdebodin has been provided an opportunity to verify the efficacy of the fix.

Schneider Updates

Modicon Controllers Update

Schneider published an update that was originally published on May 14^th, 2019.  New information includes:

Added mitigation measures for M340;

Added four new vulnerabilities (links for reports w/exploits from Talos):

• Denial of service vulnerability - CVE-2019-6809;

• Denial of service vulnerability - CVE-2019-6828;

• Denial of service vulnerability - CVE-2019-6829; and

• Denial of service vulnerability - CVE-2019-6830

SCADAPack Update

Schneider published an update for an advisory that was originally published on May 24^th, 2017. New information includes:

• Updated researcher acknowledgement section;

• Corrected CVE ID from CVE-2017-6028 to CVE-2017-6034; and

• Corrected vulnerability description

Siemens Advisory

Siemens published an advisory describing two vulnerabilities in their SIMATIC S7-1200 and SIMATIC

S7-1500 CPU families.  The vulnerabilities were reported by Eli Biham, Sara Bitan, Aviad Carmel, and Alon Dankner, Uriel Malin, and Avishai Woo. Siemens has generic workarounds that mitigate the vulenrabilities. There is no indication that the researchers have been provided an opportunity to verify the efficacy of the fix.

The two reported vulnerabilities are:

• Man-in-the-middle vulnerability - CVE-2019-10929; and

• Code change vulnerability - CVE-2019-10943

Siemens Updates

ZombieLoad Update

Siemens published an update for an advisory that was originally published on July 9^th, 2019. New information includes:

• SIMATIC IPCs 427D, 477D, 627D, 627E, 647D, 647E, 677D, 677E, 827D, 847D, 847E; and

• FieldPG M6

GNU/Linux Update

Siemens published an update for an advisory that was originally published on November 27^th, 2019. New information includes:

• Added CVE-2018-19591, CVE-2019-11360, CVE-2019-13272; and

• Moved CVE2018-16862 from buildtime to runtime relevant

Cisco Exploit

Angelo Ruwantha published a Metasploit module for a vulnerability in the Cisco Adaptive Security Appliance; Cisco published an advisory on this vulnerability on June 6thy, 2018. NCCIC-ICS published an advisory for Rockwell Automation Allen-Bradley Stratix 5950 listing this vulnerability.

WindRiver (Urgent/11) Exploit

Zhou Yu published an exploit for an integer overflow vulnerability in the Wind River VxWorks (one of the Urgent/11 vulnerabilities).

One Advisory Published – 05-30-19

Today the DHS NCCIC-ICS published a control system security advisory for products from AVEVA. The advisory describes an insufficiently protected credentials vulnerability in the AVEVA Vijeo Citect and CitectSCADA software. The vulnerability was reported by VAPT Team, C3i Center, and IIT Kanpur. AVEVA is recommending upgrading to a newer product; CitectSCADA 2018. There is no indication that the researchers have been provided an opportunity to verify the efficacy of the fix.

NCCIC-ICS reports that a relatively low-skilled attacker could exploit the vulnerability to allow a locally authenticated user to obtain Citect user credentials.