Samba Security Update
Date: 13 July 2017
The purpose of this advisory is to bring attention to the recently released security update for Samba.
Samba has released a security patch in Samba versions: 4.6.6, 4.5.12 and 4.4.15 to correct the security issue. Exploitation of this vulnerability could allow a MITM (Man in the Middle) attacker to impersonate a trusted server and gain elevated access to the domain.
- All versions of Samba from 4.0.0 onward using embedded Heimdal Kerberos.
Not Affected Versions:
- Samba versions 4.6.6, 4.5.12 and 4.4.15
CVE Reference: CVE-2017-11103
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.
CCIRC recommends that system administrators test and deploy the vendor-released updates to affected applications accordingly or workarounds to affected platforms accordingly.
Note to Readers
In support of Public Safety's mission to build a safe and resilient Canada, CCIRC's mandate is to help ensure the security and resilience of the vital non-federal government cyber systems that underpin Canada's national security, public safety and economic prosperity. As Canada's computer security incident response team, CCIRC is Canada's national coordination centre for the prevention and mitigation of, preparedness for, response to, and recovery from cyber incidents on non-federal government systems. It does this by providing authoritative advice and support, and coordinating information sharing and incident response.
Please note, CCIRC PGP key has recently been updated.
For general information, please contact Public Safety Canada's Public Affairs division at:
Telephone: 613-944-4875 or 1-800-830-3118
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