Multiple vulnerabilities in Siemens TeleControl Server Basic
| Risk | Low |
| Patch available | NO |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2018-4835 CVE-2018-4836 CVE-2018-4837 |
| CWE-ID | CWE-200 CWE-264 CWE-400 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
TeleControl Server Basic Client/Desktop applications / Other client software |
| Vendor | Siemens |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Information disclosure
EUVDB-ID: #VU10352
Risk: Low
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2018-4835
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.
The weakness exists due to authentication bypass. A remote attacker with network access to Port 8000/TCP can bypass authentication and gain access to limited information.
Siemens has identified the following specific workarounds and mitigations that customers can apply to reduce the risk:
• If TeleControl Server Basic is operated in standalone mode, then customers can close port 8000/tcp on the Windows firewall.
• If Telecontrol Server Basic is operated in redundancy mode, then customers can use the Windows firewall to restrict access to port 8000/tcp to the second Telecontrol Server Basics’ IP address.
TeleControl Server Basic: 3.1
CPE2.3 External linkshttps://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-651454.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.
2) Privilege escalation
EUVDB-ID: #VU10353
Risk: Low
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2018-4836
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain elevated privileges on the target system.
The weakness exists due to improper access and privileges controls. A remote attacker with network access to Port 8000/TCP can escalate his privileges and perform administrative operations.
Siemens has identified the following specific workarounds and mitigations that customers can apply to reduce the risk:
• If TeleControl Server Basic is operated in standalone mode, then customers can close port 8000/tcp on the Windows firewall.
• If Telecontrol Server Basic is operated in redundancy mode, then customers can use the Windows firewall to restrict access to port 8000/tcp to the second Telecontrol Server Basics’ IP address.
TeleControl Server Basic: 3.1
CPE2.3 External linkshttps://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-651454.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.
3) Resource exhaustion
EUVDB-ID: #VU10354
Risk: Low
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2018-4837
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists due to resource exhaustion. A remote attacker with access to the TeleControl Server Basic’s webserver (Ports 80/TCP or 443/TCP) can trigger memory corruption and cause the web server to crash.
Siemens has identified the following specific workarounds and mitigations that customers can apply to reduce the risk:
• Customers can use the Windows firewall to close port 80/tcp and 443/tcp.
TeleControl Server Basic: 3.1
CPE2.3 External linkshttps://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-651454.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.
