A symlink following vulnerability was found in Samba, where a user can create a symbolic link that will make 'smbd' escape the configured share path. This flaw allows a remote user with access to the exported part of the file system under a share via SMB1 unix extensions or NFS to create symlinks to files outside the 'smbd' configured share path and gain access to another restricted server's filesystem.
The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files.
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
| Link | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2137776 | issue tracking third party advisory |
| https://www.samba.org/samba/security/CVE-2022-3592.html | vendor advisory |
| https://access.redhat.com/security/cve/CVE-2022-3592 | third party advisory |
| https://security.gentoo.org/glsa/202309-06 | vendor advisory |