Multiple vulnerabilities in Western Digital MyCloud products
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2020-28940 CVE-2020-28971 |
| CWE-ID | CWE-287 |
| Exploitation vector | Local network |
| Public exploit | N/A |
| Vulnerable software |
My Cloud PR2100 Hardware solutions / Other hardware appliances My Cloud PR4100 Hardware solutions / Other hardware appliances My Cloud EX2 Ultra Hardware solutions / Other hardware appliances My Cloud EX4100 Hardware solutions / Other hardware appliances My Cloud Mirror Gen 2 Hardware solutions / Other hardware appliances |
| Vendor | Western Digital |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Improper Authentication
EUVDB-ID: #VU49031
Risk: Low
CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2020-28940
CWE-ID:
CWE-287 - Improper Authentication
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error when processing authentication requests within the nasAdmin service. A remote attacker on the local network can bypass authentication process and execute arbitrary commands on the device.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMy Cloud PR2100: before 5.06.115
My Cloud PR4100: before 5.06.115
My Cloud EX2 Ultra: before 5.06.115
My Cloud EX4100: before 5.06.115
My Cloud Mirror Gen 2: before 5.06.115
CPE2.3- cpe:2.3:h:western_digital:my_cloud_pr2100:*:*:*:*:*:*:*:*
- cpe:2.3:h:western_digital:my_cloud_pr4100:*:*:*:*:*:*:*:*
- cpe:2.3:h:western_digital:my_cloud_ex2_ultra:*:*:*:*:*:*:*:*
- cpe:2.3:h:western_digital:my_cloud_ex4100:*:*:*:*:*:*:*:*
- cpe:2.3:h:western_digital:my_cloud_mirror_gen_2:*:*:*:*:*:*:*:*
https://support.wdc.com/downloads.aspx?g=907&lang=en#downloads
https://www.westerndigital.com/support/productsecurity/wdc-20009-os5-firmware-5-06-115
https://www.zerodayinitiative.com/advisories/ZDI-20-1445/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Improper Authentication
EUVDB-ID: #VU49032
Risk: Low
CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2020-28971
CWE-ID:
CWE-287 - Improper Authentication
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error when processing authentication requests within the nasAdmin service. A remote attacker on the local network can bypass authentication process and execute arbitrary commands on the device.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMy Cloud PR2100: before 5.06.115
My Cloud PR4100: before 5.06.115
My Cloud EX2 Ultra: before 5.06.115
My Cloud EX4100: before 5.06.115
My Cloud Mirror Gen 2: before 5.06.115
CPE2.3- cpe:2.3:h:western_digital:my_cloud_pr2100:*:*:*:*:*:*:*:*
- cpe:2.3:h:western_digital:my_cloud_pr4100:*:*:*:*:*:*:*:*
- cpe:2.3:h:western_digital:my_cloud_ex2_ultra:*:*:*:*:*:*:*:*
- cpe:2.3:h:western_digital:my_cloud_ex4100:*:*:*:*:*:*:*:*
- cpe:2.3:h:western_digital:my_cloud_mirror_gen_2:*:*:*:*:*:*:*:*
https://support.wdc.com/downloads.aspx?g=907&lang=en#downloads
https://www.westerndigital.com/support/productsecurity/wdc-20009-os5-firmware-5-06-115
https://www.zerodayinitiative.com/advisories/ZDI-20-1447/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
