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Samba 4.17.x < 4.17.2 Symlink Following

medium Nessus Plugin ID 166908

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Synopsis

The remote Samba server is potentially affected by a UNIX symbolic link (symlink) following vulnerability

Description

A UNIX symbolic link (symlink) following vulnerability exists in all versions of Samba since 4.17, which introduced following symlinks in user space shares configured by an administrator. Improper symlink target checking in a corner case leads to a user being able to create a symbolic link that will make the Samba daemon (smbd) escape the configured share path.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Samba version 4.17.2 or later, or apply vendor workaround.

See Also

https://www.samba.org/samba/security/CVE-2022-3592.html

Plugin Details

Severity: Medium

ID: 166908

File Name: samba_cve_2022-3592.nasl

Version: 1.5

Type: remote

Family: Misc.

Published: 11/3/2022

Updated: 1/23/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:N/A:N

CVSS Score Source: CVE-2022-3592

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:samba:samba

Required KB Items: SMB/NativeLanManager, SMB/samba

Exploit Ease: No known exploits are available

Patch Publication Date: 10/25/2022

Vulnerability Publication Date: 10/28/2022

Reference Information

CVE: CVE-2022-3592

IAVA: 2022-A-0447-S