CVE-2019-9579 Missing authorization in n/a
An attacker with write extended attributes permissions can modify file permissions in the SMB server due to improper handling of ZFS extended attributes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-9579?
CVE-2019-9579 is a high-severity missing authorization vulnerability in Oracle Solaris, published on 26 Dec 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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).
Weakness: CWE-276
Which versions are affected by CVE-2019-9579?
It affects 2 products.
Products include Illumos Illumos, Oracle Solaris.
How do I fix CVE-2019-9579?
No fix has been published for CVE-2019-9579 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2019-9579 being exploited?
There is no known exploitation of CVE-2019-9579 in the wild and no public exploit code.
Other vulnerabilities in Oracle Solaris
Sources
Also known as GHSA-79p4-hp34-c4rw.