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Security Bulletin: Security Bulletin: Samba vulnerability affects IBM SONAS (CVE-2017-9461)

Security Bulletin


IBM SONAS is shipped with Samba, for which a fix is available for security vulnerability.

Vulnerability Details

Samba is used in IBM SONAS to enable file management and authentication services for Microsoft Windows environments.

CVEID: CVE-2017-9461
Samba is vulnerable to a denial of service, caused by improper handling of dangling symlinks in smbd. A remote attacker could exploit this vulnerability to cause a fd_open_atomic infinite loop with high CPU usage and memory consumption on the system.
CVSS Base Score: 7.5
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

The product is affected when running a code releases to


A fix for this issue is in version of IBM SONAS. Customers running an affected version of SONAS should upgrade to or a later version, so that the fix gets applied.

Please contact IBM support for assistance in upgrading your system.

Workarounds and Mitigations

Mitigation(s): Ensure that all users who have access to the system are authenticated by another security system such as a firewall.

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Change History

26 September 2017 : First draft

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.


According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Internal Use Only

CQ S1064127 [PSIRT 8933] Product ID 97053 for IBM SONAS and 97054 for IFS - Open Source Samba Samba Vulnerabilities (CVE-2017-9461)

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Document Information

Modified date:
17 June 2018