Information disclosure in samba (Alpine package)

Published: 2018-08-14

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2018-10919
CWE-ID	CWE-284
Exploitation vector	Local network
Public exploit	N/A
Vulnerable software Subscribe	samba (Alpine package) Operating systems & Components / Operating system package or component
Vendor	Alpine Linux Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU14335

Risk: Low

CVSSv3.1: 5 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-10919

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to missing access control checks when displaying values of confidential attributes. A remote authenticated attacker can use LDAP search expression to obtain both of attributes where the schema SEARCH_FLAG_CONFIDENTIAL (0x80) searchFlags bit and where an explicit Access Control Entry has been specified on the ntSecurityDescriptor.

Mitigation

Install update from vendor's website.

Vulnerable software versions

samba (Alpine package): 4.1.1-r0 - 4.5.16-r0

External links

http://git.alpinelinux.org/aports/commit/?id=4546f9e35ada97ed969b42d4d722ed955a9a767c
http://git.alpinelinux.org/aports/commit/?id=d687a72fe70a1c11bae70cc0418ea1125a9b9c25
http://git.alpinelinux.org/aports/commit/?id=2a5d0006bdb59356b99ca90d9b2b6147c0d526f6
http://git.alpinelinux.org/aports/commit/?id=53e46bd2838462d43bb89139a98f91afc31b6a08
http://git.alpinelinux.org/aports/commit/?id=d773d4c9846c9af6fff4cf55c1942ce486760f82

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.