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

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU32622

Risk: Medium

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2013-4475

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

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

Samba 3.2.x through 3.6.x before 3.6.20, 4.0.x before 4.0.11, and 4.1.x before 4.1.1, when vfs_streams_depot or vfs_streams_xattr is enabled, allows remote attackers to bypass intended file restrictions by leveraging ACL differences between a file and an associated alternate data stream (ADS).

Mitigation

Install update from vendor's website.

Vulnerable software versions

samba (Alpine package): 3.6.13-r0 - 3.6.19-r1

CPE2.3

• cpe:2.3:o:alpine:samba_alpine_package:3.6.13-r0:*:*:*:*:alpine_linux:*:2.3
• cpe:2.3:o:alpine:samba_alpine_package:3.6.19-r1:*:*:*:*:alpine_linux:*:2.6

External links

https://git.alpinelinux.org/aports/commit/?id=145836360ec3811eac5629311303d891a9088ce4
https://git.alpinelinux.org/aports/commit/?id=facd113ce1db85be7279f8170bbc8f8857372575
https://git.alpinelinux.org/aports/commit/?id=ce1d3eb25cf80502fc9c9b6604f7efb372ff2ac8
https://git.alpinelinux.org/aports/commit/?id=d8fa59f0ddf835f8d9c7c0b2b45a1a626c8898c6

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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