Samba up to 4.17.1 Wide Link symlink

Summaryinfo

A vulnerability was found in Samba up to 4.17.1. It has been rated as critical. Affected by this issue is some unknown functionality of the component Wide Link Handler. Performing a manipulation results in symlink. This vulnerability is cataloged as CVE-2022-3592. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in Samba up to 4.17.1 (File Transfer Software). This affects an unknown function of the component Wide Link Handler. The manipulation with an unknown input leads to a symlink vulnerability. CWE is classifying the issue as CWE-61. 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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 weakness was shared 10/29/2022. It is possible to read the advisory at samba.org. This vulnerability is uniquely identified as CVE-2022-3592. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 211337 (Fedora 37 : samba (2022-8a9a568dbe)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.17.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (211337). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• File Transfer Software

Name

• Samba

Version

• 4.17.0
• 4.17.1

License

• open-source

Website

• Product: https://www.samba.org/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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