Multiple vulnerabilities in PTC Kepware products
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2020-27265 CVE-2020-27263 CVE-2020-27267 |
| CWE-ID | CWE-121 CWE-122 CWE-416 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
KEPServerEX Server applications / SCADA systems ThingWorx Kepware Server Server applications / SCADA systems ThingWorx Industrial Connectivity Server applications / SCADA systems OPC-Aggregator Server applications / SCADA systems |
| Vendor | Kepware |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Stack-based buffer overflow
EUVDB-ID: #VU49105
Risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-27265
CWE-ID:
CWE-121 - Stack-based buffer overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing OPC UA messages. A remote unauthenticated attacker can trick the victim into opening a specially crafted OPC UA message, trigger stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsKEPServerEX: 6.0 - 6.9
ThingWorx Kepware Server: before 6.9.584.0
ThingWorx Industrial Connectivity: before 8.5 (6.7.1068.0)
OPC-Aggregator: before 6.9.584.0
External linkshttp://ics-cert.us-cert.gov/advisories/icsa-20-352-02
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Heap-based buffer overflow
EUVDB-ID: #VU49106
Risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-27263
CWE-ID:
CWE-122 - Heap-based Buffer Overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing OPC UA messages. A remote attacker can send specially crafted OPC UA message, trick the victim into opening it, trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsKEPServerEX: 6.0 - 6.9
ThingWorx Kepware Server: before 6.9.584.0
ThingWorx Industrial Connectivity: before 8.5 (6.7.1068.0)
OPC-Aggregator: before 6.9.584.0
External linkshttp://ics-cert.us-cert.gov/advisories/icsa-20-352-02
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Use-after-free
EUVDB-ID: #VU49107
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-27267
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a use-after-free error. A remote attacker can create and close OPC UA connections at a high rate that may cause a server to crash.
MitigationInstall updates from vendor's website.
Vulnerable software versionsKEPServerEX: 6.0 - 6.9
ThingWorx Kepware Server: before 6.9.584.0
ThingWorx Industrial Connectivity: before 8.5 (6.7.1068.0)
OPC-Aggregator: before 6.9.584.0
External linkshttp://ics-cert.us-cert.gov/advisories/icsa-20-352-02
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
