Detections
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EulerOS Virtualization 3.0.6.6 : samba (EulerOS-SA-2024-1665)

medium Nessus Plugin ID 197263

Synopsis

The remote EulerOS Virtualization host is missing multiple security updates.

Description

According to the versions of the samba packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

 - An infinite loop vulnerability 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 Type Confusion vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets, one encoded data structure is a key-value style dictionary where the keys are character strings, and the values can be any of the supported types in the mdssvc protocol. Due to a lack of type checking in callers of the dalloc_value_for_key() function, which returns the object associated with a key, a caller may trigger a crash in talloc_get_size() when talloc detects that the passed-in pointer is not a valid talloc pointer. With an RPC worker process shared among multiple client connections, a malicious client or attacker can trigger a process crash in a shared RPC mdssvc worker process, affecting all other clients this worker serves. (CVE-2023-34967)

 - A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS module 'acl_xattr' is configured with 'acl_xattr:ignore system acls = yes'. The SMB protocol allows opening files when the client requests read-only access but then implicitly truncates the opened file to 0 bytes if the client specifies a separate OVERWRITE create disposition request. The issue arises in configurations that bypass kernel file system permissions checks, relying solely on Samba's permissions. (CVE-2023-4091)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected samba packages.

See Also

http://www.nessus.org/u?251b46ae

Plugin Details

Severity: Medium

ID: 197263

File Name: EulerOS_SA-2024-1665.nasl

Version: 1.0

Type: local

Published: 5/17/2024

Updated: 5/17/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2023-4091

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:N/I:H/A:N

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

Vulnerability Information

CPE: p-cpe:/a:huawei:euleros:samba-common, p-cpe:/a:huawei:euleros:samba-libs, p-cpe:/a:huawei:euleros:samba-winbind, p-cpe:/a:huawei:euleros:samba-client-libs, p-cpe:/a:huawei:euleros:libsmbclient, p-cpe:/a:huawei:euleros:samba-common-libs, p-cpe:/a:huawei:euleros:libwbclient, p-cpe:/a:huawei:euleros:samba-python, p-cpe:/a:huawei:euleros:samba-common-tools, p-cpe:/a:huawei:euleros:samba-winbind-clients, p-cpe:/a:huawei:euleros:samba, p-cpe:/a:huawei:euleros:samba-winbind-modules, cpe:/o:huawei:euleros:uvp:3.0.6.6, p-cpe:/a:huawei:euleros:samba-client

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/EulerOS/release, Host/EulerOS/rpm-list, Host/EulerOS/uvp_version

Exploit Ease: No known exploits are available

Patch Publication Date: 5/16/2024

Vulnerability Publication Date: 7/20/2023

Reference Information

CVE: CVE-2023-34966, CVE-2023-34967, CVE-2023-4091

IAVA: 2023-A-0376-S, 2023-A-0535