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-2018-1050
DESCRIPTION: Samba is vulnerable to a denial of service, caused by missing null pointer checks on some of the input parameters. By sending specially RPC calls to the ''spoolss'' service, a remote attacker could exploit this vulnerability to cause the print spooler service to crash.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/140206 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)

CVEID: CVE-2018-1057
DESCRIPTION: Samba could allow a remote authenticated attacker to bypass security restrictions, caused by the improper validation of permissions when modifying passwords by the LDAP server on an Active Directory (AD) domain controller (DC). An attacker could exploit this vulnerability to modify the passwords of other users including administrative users.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/140207 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N)

Affected Products and Versions

Releases 7.2 and 7.3 of IBM i 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.

http://www-933.ibm.com/support/fixcentral/

The IBM i PTF numbers are:

Release 7.2 – SI67329
Release 7.3 – SI67330

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

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References

Complete CVSS v2 Guide
On-line Calculator v2

Complete CVSS v3 Guide
On-line Calculator v3

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*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

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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Security Bulletin: Multiple Vulnerabilities in Samba affect IBM i