Multiple vulnerabilities in Siemens SIPROTEC 5 relays
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2021-33719 CVE-2021-33720 |
| CWE-ID | CWE-119 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
SIPROTEC 5 relays with CPU variants CP150 Hardware solutions / Firmware SIPROTEC 5 relays with CPU variants CP200 Hardware solutions / Firmware SIPROTEC 5 relays with CPU variants CP050 Hardware solutions / Firmware SIPROTEC 5 relays with CPU variants CP100 Hardware solutions / Firmware SIPROTEC 5 relays with CPU variants CP300 Hardware solutions / Firmware |
| Vendor | Siemens |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Buffer overflow
EUVDB-ID: #VU56620
Risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-33719
CWE-ID:
CWE-119 - Memory corruption
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. A remote attacker can send a specially crafted packet, trigger memory corruption 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 versionsSIPROTEC 5 relays with CPU variants CP150: All versions
SIPROTEC 5 relays with CPU variants CP200: All versions
SIPROTEC 5 relays with CPU variants CP050: before 8.80
SIPROTEC 5 relays with CPU variants CP100: before 8.80
SIPROTEC 5 relays with CPU variants CP300: before 8.80
External linkshttp://cert-portal.siemens.com/productcert/pdf/ssa-847986.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) Buffer overflow
EUVDB-ID: #VU56621
Risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-33720
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error. A remote attacker can send a specially crafted packet, trigger memory corruption and cause a denial of service condition on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsSIPROTEC 5 relays with CPU variants CP150: All versions
SIPROTEC 5 relays with CPU variants CP200: All versions
SIPROTEC 5 relays with CPU variants CP050: before 8.80
SIPROTEC 5 relays with CPU variants CP100: before 8.80
SIPROTEC 5 relays with CPU variants CP300: before 8.80
External linkshttp://cert-portal.siemens.com/productcert/pdf/ssa-847986.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.
