#VU71213 Out-of-bounds write in Western Digital products - CVE-2022-29844

Vulnerability identifier: #VU71213

Vulnerability risk: High

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:Amber]

CVE-ID: CVE-2022-29844

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
My Cloud PR2100
Hardware solutions / Other hardware appliances
My Cloud PR4100
Hardware solutions / Other hardware appliances
My Cloud EX4100
Hardware solutions / Other hardware appliances
My Cloud EX2 Ultra
Hardware solutions / Other hardware appliances
My Cloud Mirror G2
Hardware solutions / Other hardware appliances
My Cloud DL2100
Hardware solutions / Other hardware appliances
My Cloud DL4100
Hardware solutions / Other hardware appliances
My Cloud EX2100
Hardware solutions / Other hardware appliances
WD Cloud
Hardware solutions / Other hardware appliances
My Cloud
Hardware solutions / Office equipment, IP-phones, print servers

Vendor: Western Digital

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in the FTP service. A remote attacker can trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

My Cloud PR2100: before 5.26.119

My Cloud PR4100: before 5.26.119

My Cloud EX4100: before 5.26.119

My Cloud EX2 Ultra: before 5.26.119

My Cloud Mirror G2: before 5.26.119

My Cloud DL2100: before 5.26.119

My Cloud DL4100: before 5.26.119

My Cloud EX2100: before 5.26.119

My Cloud: before 5.26.119

WD Cloud: before 5.26.119

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External links
https://www.westerndigital.com/support/product-security/wdc-23002-my-cloud-firmware-version-5-26-119
https://www.zerodayinitiative.com/advisories/ZDI-23-112/

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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.