Samba security update

Number: AV17-073
Date: 25 May 2017

Purpose

The purpose of this advisory is to bring attention to the recently released security update for Samba.

Assessment

Samba has released version 4.7.5 that contains security fixes to address a vulnerability VulnerabilityA flaw or weakness in the design or implementation of an information system or its environment that could be exploited to adversely affect an organization's assets or operations. .  Exploitation of this vulnerability could allow a malicious client to upload a shared library to a writable share, and then cause the server to load and execute it.

Affected Versions:

• Samba 3.5.0 to 4.6.3 (for versions 4.6.x)
• Samba 3.5.0 to 4.5.9 (for versions 4.5.x)
• Samba 3.5.0 to 4.4.13 (for versions 4.4.x)

CVE Reference: CVE-2017-7494

Special consideration and review should be conducted for internet connected devices which may be leveraging vulnerable versions of Samba, including but not limited to: DVRs, routers and IP cameras.  These types of devices typically can only be updated via vendor released firmware updates.

Suggested action

CCIRC recommends that system administrators test and deploy the vendor-released updates to affected applications accordingly or workarounds to affected platforms accordingly.

References

https://lists.samba.org/archive/samba-announce/2017/000406.html
https://www.samba.org/samba/security/CVE-2017-7494.html