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Vulnerability record · CVE-2019-9579 · published 26 December 2022

CVE-2019-9579: Illumos incorrect default permissions vulnerability

Illumos · Illumos

An issue was discovered in Illumos in Nexenta NexentaStor 4.0.5 and 5.1.2, and other products. The SMB server allows an attacker to have unintended access, e.g., an attacker with WRITE_XATTR can change permissions. This occurs because of a combination of three factors: ZFS extended attributes are used to implement NT named streams, the SMB protocol requires implementations to have open handle semantics similar to those of NTFS, and the SMB server passes along certain attribute requests to the underlying object (i.e., they are not considered to be requests that pertain to the named stream).

8.1 CVSS 3.1 High EPSS 0.50% · top 59.0% CWE-276 · Incorrect default permissions
8.1CVSS 3.1 base score
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in Illumos in Nexenta NexentaStor 4.0.5 and 5.1.2, and other products. The SMB server allows an attacker to have unintended access, e.g., an attacker with WRITE_XATTR can change permissions. This occurs because of a combination of three factors: ZFS extended attributes are used to implement NT named streams, the SMB protocol requires implementations to have open handle semantics similar to those of NTFS, and the SMB server passes along certain attribute requests to the underlying object (i.e., they are not considered to be requests that pertain to the named stream).

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.illumos.org/issues/10506 MitigationPatchVendor Advisory
https://www.oracle.com/security-alerts/cpuapr2020.html PatchThird Party Advisory
https://www.illumos.org/issues/10506 MitigationPatchVendor Advisory
https://www.oracle.com/security-alerts/cpuapr2020.html PatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-9579), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.