Information disclosure in samba (Alpine package)

1) Information disclosure

EUVDB-ID: #VU32349

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-5299

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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

The shadow_copy2_get_shadow_copy_data function in modules/vfs_shadow_copy2.c in Samba 3.x and 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3 does not verify that the DIRECTORY_LIST access right has been granted, which allows remote attackers to access snapshots by visiting a shadow copy directory.

Mitigation

Install update from vendor's website.

Vulnerable software versions

samba (Alpine package): 4.1.1-r0 - 4.2.3-r3

CPE2.3

• cpe:2.3:o:alpine:samba_alpine_package:4.1.8-r0:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:samba_alpine_package:4.1.14-r1:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:samba_alpine_package:4.1.9-r0:*:*:*:*:alpine_linux:*:

External links

http://git.alpinelinux.org/aports/commit/?id=2c8df8d5eb5c12b722deb30952b55b164fc7111a
http://git.alpinelinux.org/aports/commit/?id=47affed1795cc5ca4cdd4625ea53ba85513f0636

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.