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Security Bulletin: Multiple Vulnerabilities in Samba affect IBM i

Security Bulletin


Summary

Samba is supported on IBM i. IBM i has addressed the applicable CVEs.

Vulnerability Details

CVEID: CVE-2018-10918
DESCRIPTION: Samba is vulnerable to a denial of service, caused by a NULL pointer dereference when checking database outputs from the LDB database layer. If Samba is in an Active Directory Domain Controller configuration, a remote attacker could exploit this vulnerability to cause the "samba" process to crash.
CVSS Base Score: 5.2
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/148709 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:A/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H)

 

CVEID: CVE-2018-1139
DESCRIPTION: Samba could allow a remote attacker to obtain sensitive information, caused by the use of weak NTLMv1 authentication over an SMB1 transport. An attacker could exploit this vulnerability using man-in-the-middle techniques to read details passed between the samba server and client.
CVSS Base Score: 5.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/148707 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)

 

CVEID: CVE-2018-10919
DESCRIPTION: Samba could allow a remote attacker to obtain sensitive information, caused by missing access control checks in the Active Directory LDAP server. An attacker could exploit this vulnerability using authenticated LDAP search expressions to obtain confidential attribute values.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/148708 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

 

CVEID: CVE-2018-10858
DESCRIPTION: Samba is vulnerable to a heap-based buffer overflow, caused by improper bounds checking by libsmbclient. By sending an overly long filename, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
CVSS Base Score: 7.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/148710 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

 

CVEID: CVE-2018-1140
DESCRIPTION: Samba is vulnerable to a denial of service, caused by missing NULL pointer checks on some of the input parameters to the implementation of LDP database. If Samba is in an Active Directory Domain Controller configuration, a remote attacker could exploit this vulnerability to cause the LDAP server and DNS server to crash.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/148706 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Releases 7.2 and 7.3 of IBM are affected.

Remediation/Fixes

The issue can be fixed by applying a PTF to the IBM i Operating System.

 

Releases 7.2 and 7.3 of IBM i are supported and will be fixed.

 

https://www-945.ibm.com/support/fixcentral/

 

The IBM i PTF numbers are:

Release 7.2 - SI68291

Release 7.3 - SI68292

 

Important note: IBM recommends that all users running unsupported versions of affected products upgrade to supported and fixed version of affected products.

 

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

Reference

Complete CVSS v3 Guide
On-line Calculator v3

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

17 Sept 2017: Original Document Published

*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.

Disclaimer

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.


Cross reference information
Product Component Platform Version Edition
IBM i 7.2 IBM i 7.2
IBM i 7.3 IBM i 7.3

Document information

More support for: IBM i

Software version: 7.2, 7.3, 7.2,73

Operating system(s): IBM i

Reference #: 0730345

Modified date: 17 September 2018