Security Bulletin: Samba for IBM i is affected by CVE-2020-14323 and CVE-2020-14318

Security Bulletin

Summary

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

Vulnerability Details

CVEID: CVE-2020-14323
DESCRIPTION: Samba is vulnerable to a denial of service, caused by a NULL pointer dereference in the Winbind service. By sending a specially-crafted packet, a local authenticated attacker could exploit this vulnerability to crash the winbind service.
CVSS Base score: 5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/190934 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H)

CVEID: CVE-2020-14318
DESCRIPTION: Samba could allow a remote authenticated attacker to obtain sensitive information, caused by a missing permissions check on a directory handle requesting ChangeNotify. By sending a specially-crafted request, an attacker could exploit this vulnerability to obtain file name information, and use this information to launch further attacks against the affected system.
CVSS Base score: 4.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/191029 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)

Affected Products and Versions

Affected Product(s)	Version(s)
IBM i	7.4
IBM i	7.3
IBM i	7.2

Remediation/Fixes

The issues can be resolved by applying a PTF to IBM i.

Releases 7.4, 7.3, and 7.2 of IBM i are supported and will be fixed.

The IBM i PTF numbers are:

Release 7.4 – SI74697
Release 7.3 – SI74696
Release 7.2 – SI74695

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

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 v3 Guide
On-line Calculator v3

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Change History

11 Nov 2020: Initial Publication

*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.

Document Location

Worldwide

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Tips

Security Bulletin: Samba for IBM i is affected by CVE-2020-14323 and CVE-2020-14318