What’s Vulnerable › Vulnerabilities

CVE-2022-22995: Western Digital My Cloud OS 5 and My Cloud Home Unauthenticated Arbitrary File Write Vulnerability in Netatalk

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-03-25 · updated 2026-06-17
• Weakness: CWE-59

Description

The combination of primitives offered by SMB and AFP in their default configuration allows the arbitrary writing of files. By exploiting these combination of primitives, an attacker can execute arbitrary code.

Affected products

• Fedoraproject Fedora: 37, 38, 39
• Netatalk: before 3.1.18 — fixed in 3.1.18
• Westerndigital My Cloud Dl2100 Firmware: before 5.19.117 — fixed in 5.19.117
• Westerndigital My Cloud Dl4100 Firmware: before 5.19.117 — fixed in 5.19.117
• Westerndigital My Cloud Ex2100 Firmware: before 5.19.117 — fixed in 5.19.117
• Westerndigital My Cloud Ex2 Ultra Firmware: before 5.19.117 — fixed in 5.19.117
• Westerndigital My Cloud Ex4100 Firmware: before 5.19.117 — fixed in 5.19.117
• Westerndigital My Cloud Firmware: before 5.19.117 — fixed in 5.19.117
• Westerndigital My Cloud Home Firmware: before 7.16-220 — fixed in 7.16-220
• Westerndigital My Cloud Mirror Gen 2 Firmware: before 5.19.117 — fixed in 5.19.117
• Westerndigital My Cloud Pr2100 Firmware: before 5.19.117 — fixed in 5.19.117
• Westerndigital My Cloud Pr4100 Firmware: before 5.19.117 — fixed in 5.19.117
• Westerndigital Wd Cloud Firmware: before 5.19.117 — fixed in 5.19.117

How to fix

Upgrade to a fixed version: Netatalk 3.1.18; Westerndigital My Cloud Dl2100 Firmware 5.19.117; Westerndigital My Cloud Dl4100 Firmware 5.19.117; Westerndigital My Cloud Ex2100 Firmware 5.19.117; Westerndigital My Cloud Ex2 Ultra Firmware 5.19.117; Westerndigital My Cloud Ex4100 Firmware 5.19.117; Westerndigital My Cloud Firmware 5.19.117; Westerndigital My Cloud Home Firmware 7.16-220; Westerndigital My Cloud Mirror Gen 2 Firmware 5.19.117; Westerndigital My Cloud Pr2100 Firmware 5.19.117; Westerndigital My Cloud Pr4100 Firmware 5.19.117; Westerndigital Wd Cloud Firmware 5.19.117. Check the vendor advisory for mitigations.

References

• https://lists.debian.org/debian-lts-announce/2024/01/msg00000.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/55ROUJI22SHZX5EM23QAILZHI67EZQKW/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T5CZZLFOTUP3QYHGHSDUNENGSLPJ6KGO/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XO34FWOIJI6V6PH2XY52WNBBARVWPJG2/
• https://security.gentoo.org/glsa/202311-02
• https://www.westerndigital.com/support/product-security/wdc-22005-netatalk-security-vulnerabilities
• https://lists.debian.org/debian-lts-announce/2024/01/msg00000.html
• https://lists.debian.org/debian-lts-announce/2024/11/msg00026.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/55ROUJI22SHZX5EM23QAILZHI67EZQKW/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T5CZZLFOTUP3QYHGHSDUNENGSLPJ6KGO/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XO34FWOIJI6V6PH2XY52WNBBARVWPJG2/
• https://security.gentoo.org/glsa/202311-02

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