Permissions, Privileges, and Access Controls in samba (Alpine package)

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU32799

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2012-2111

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote #AU# to read and manipulate data.

The (1) CreateAccount, (2) OpenAccount, (3) AddAccountRights, and (4) RemoveAccountRights LSA RPC procedures in smbd in Samba 3.4.x before 3.4.17, 3.5.x before 3.5.15, and 3.6.x before 3.6.5 do not properly restrict modifications to the privileges database, which allows remote authenticated users to obtain the "take ownership" privilege via an LSA connection.

Mitigation

Install update from vendor's website.

Vulnerable software versions

samba (Alpine package): 3.4.8-r0 - 3.5.14-r0

CPE2.3

• cpe:2.3:a:alpine:samba_alpine_package:3.4.8-r0:*:*:*:*:alpine_linux:*:1.10
• cpe:2.3:a:alpine:samba_alpine_package:3.5.8-r0:*:*:*:*:alpine_linux:*:2.1
• cpe:2.3:a:alpine:samba_alpine_package:3.5.11-r0:*:*:*:*:alpine_linux:*:2.1

External links

https://git.alpinelinux.org/aports/commit/?id=516619f168f837bfc4da1d7f8705b3ca882bbb1c
https://git.alpinelinux.org/aports/commit/?id=c63fe772e33d028e961224e40ec25225858206ba
https://git.alpinelinux.org/aports/commit/?id=6159ade2c62c21a121371ab81cc92242c15ab4b8

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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