Security Bulletin: Multiple Vulnerabilities in Samba affect IBM i

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&gt; 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&gt; 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&gt; 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&gt; 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&gt; 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/&gt;

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