Detections
Analytics
Samba 4.16.x < 4.16.10 / 4.17.x < 4.17.9 / 4.18.x < 4.18.4 Multiple Vulnerabilities
medium Nessus Plugin ID 179166
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Synopsis
The remote Samba server is potentially affected by multiple vulnerabilities.Description
The version of Samba running on the remote host is 4.16.x prior to 4.16.10, 4.17.x prior to 4.17.9, or 4.18.x prior to 4.18.4. It is, therefore, potentially affected by multiple vulnerabilities, including the following:- An out-of-bounds read error was found in Samba due to insufficient length checks in winbindd_pam_auth_crap.c. When performing NTLM authentication, the client replies to cryptographic challenges back to the server. These replies have variable lengths, and Winbind fails to check the lan manager response length. When Winbind is used for NTLM authentication, a maliciously crafted request can trigger an out-of-bounds read in Winbind, possibly resulting in a crash. (CVE-2022-2127)
- An infinite loop condition was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets sent by the client, the core unmarshalling function sl_unpack_loop() did not validate a field in the network packet that contains the count of elements in an array-like structure. By passing 0 as the count value, the attacked function will run in an endless loop consuming 100% CPU. This flaw allows an attacker to issue a malformed RPC request, triggering an infinite loop, resulting in a denial of service condition. (CVE-2023-34966)
- A vulnerability was found in Samba's SMB2 packet signing mechanism. The SMB2 packet signing is not enforced if an admin configured 'server signing = required' or for SMB2 connections to Domain Controllers where SMB2 packet signing is mandatory. This flaw allows an attacker to perform attacks, such as a man-in-the-middle attack, by intercepting the network traffic and modifying the SMB2 messages between client and server, affecting the integrity of the data. (CVE-2023-3347)
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 4.18.5, 4.17.10, 4.16.11 or later.See Also
https://www.samba.org/samba/security/CVE-2022-2127.html
https://www.samba.org/samba/security/CVE-2023-3347.html
https://www.samba.org/samba/security/CVE-2023-34966.html
https://www.samba.org/samba/security/CVE-2023-34967.html
Plugin Details
Severity: Medium
ID: 179166
File Name: samba_4_18_5.nasl
Version: 1.2
Type: remote
Family: Misc.
Published: 8/1/2023
Updated: 10/12/2023
Configuration: Enable paranoid mode
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 5.4
Temporal Score: 4
Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:C/A:N
CVSS Score Source: CVE-2023-3347
CVSS v3
Risk Factor: Medium
Base Score: 5.9
Temporal Score: 5.2
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/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, Settings/ParanoidReport
Exploit Ease: No known exploits are available
Patch Publication Date: 7/20/2023
Vulnerability Publication Date: 7/20/2023
Reference Information
CVE: CVE-2022-2127, CVE-2023-3347, CVE-2023-34966, CVE-2023-34967, CVE-2023-34968
IAVA: 2023-A-0376-S