Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 3 |
CVE-ID | CVE-2020-27736 CVE-2020-27737 CVE-2020-27738 |
CWE-ID | CWE-170 CWE-125 CWE-788 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
Nucleus NET Server applications / Other server solutions VSTAR Server applications / Other server solutions Nucleus Source Code Server applications / Other server solutions Nucleus RTOS Server applications / Other server solutions Nucleus ReadyStart Server applications / Other server solutions Nucleus 4 Server applications / Other server solutions |
Vendor | Siemens |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
EUVDB-ID: #VU52204
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-27736
CWE-ID:
CWE-170 - Improper Null Termination
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the DNS domain name label parsing functionality does not properly validate the null-terminated name in DNS-responses. A remote attacker can cause a denial of service condition or leak the read memory.
MitigationInstall updates from vendor's website.
Vulnerable software versionsNucleus NET: All versions
VSTAR: All versions
Nucleus Source Code: All versions
Nucleus RTOS: All versions
Nucleus ReadyStart: before 2017.02.3
Nucleus 4: before 4.1.0
External linkshttp://cert-portal.siemens.com/productcert/txt/ssa-705111.txt
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.
EUVDB-ID: #VU52205
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-27737
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to a boundary condition in the DNS response parsing functionality. A remote attacker can trigger out-of-bounds read error and read contents of memory on the system or cause a denial of service (DoS) condition.
MitigationInstall updates from vendor's website.
Vulnerable software versionsNucleus NET: All versions
VSTAR: All versions
Nucleus Source Code: All versions
Nucleus RTOS: All versions
Nucleus ReadyStart: before 2017.02.3
Nucleus 4: before 4.1.0
External linkshttp://cert-portal.siemens.com/productcert/txt/ssa-705111.txt
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.
EUVDB-ID: #VU52206
Risk: Medium
CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-27738
CWE-ID:
CWE-788 - Access of Memory Location After End of Buffer
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the DNS domain name record decompression functionality does not properly validate the pointer offset values. A remote attacker can cause a denial of service condition on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsNucleus NET: All versions
VSTAR: All versions
Nucleus Source Code: All versions
Nucleus RTOS: All versions
Nucleus ReadyStart: before 2017.02.3
Nucleus 4: before 4.1.0
External linkshttp://cert-portal.siemens.com/productcert/txt/ssa-705111.txt
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.